java programs

LIST OF JAVA PROGRAMS:-

S.No Programs PgNo. 1 Program to Demonstrate simple JAVA program 4 2 Program to compute the area of a circle 5 3 Program to demonstrate type casting in JAVA 6 4 Program to demonstrate the basic Arithmetic Operations 7 5 Program to find largest of three numbers 8 6 Program to print first 10 Fibonacci numbers 9 7 Program to Calculate the factorial of a number using RECURSION 10 8 Program to print prime numbers using CLA 11 9 Program to Demonstrate Command Line Argument 12

10 Program to convert temperature from Fahrenheit to Celsius using CLA 13 11 Program to produce conversion table dollar and rupees using CLA 14 12 Program to print area of right angled triangle using CLA 15 13 Program to print all the elements in an array using CLA 16 14 Program to find the sum of all the elements in an array 17 15 Program to print all the elements in a 2D array 18 16 Program to find the sum of two matrices 19 17 Program to find the difference of two matrices using CLA 20 18 Program to print the UPPER and LOWER triangle of a matrix 21 19 Program to find the trace of a matrix 22 20 Program to find the transpose of a matrix 23 21 Program to find the product of two matrices 24 22 Program to demonstrate a CLASS 25 23 Program to demonstrate a Constructor 26 24 Program to demonstrate a Parameterized Constructor 27 25 Program to Demonstrate THIS keyword 28 26 Program to Demonstrate Constructor Overloading 29 27 Program to pass objects as parameters 31 28 Program to Demonstrate Queue using Class 32 29 Program to Demonstrate Stack using Class 34 30 Program to Demonstrate Access Specifiers 36 31 Program to Demonstrate Static Variables 37 32 Program to Demonstrate Static Methods 38 33 Program to demonstrate an Inner class 39 34 Program to Demonstrate Type Wrapping 40 35 Program to Demonstrate Single Inheritance 41 36 Program to Demonstrate Multilevel Inheritance 43 37 Program to Demonstrate hierarchical Inheritance 45 38 Program to show SUPER Class variable to refer a sub class object 47 39 Program to Demonstrate Method Overriding 48 40 Program to Demonstrate Runtime Polymorphism 49 41 Program to Demonstrate Abstract Class 51

42 Program to Demonstrate FINAL Keyword 52 43 Program to Demonstrate FINAL Method 53 44 Program to Demonstrate FINAL Class 54 45 Program to Demonstrate INTERFACE 55 46 Program to access implementation through Interface references 56 47 Program to Demonstrate EXTENDING INTERFACE 58 48 Program to Demonstrate Stack using interface 59 49 Program to Demonstrate Queue using Interface 61 50 Program to Demonstrate a SIMPLE PACKAGE 63 51 Program to Demonstrate Exception 64 52 Program to Demonstrate TRY CATCH 65 53 Program to Demonstrate CATCH ARITHMETIC Exceptions 66 54 Program to Demonstrate Multiple CATCH 67 55 Program to Demonstrate NESTED TRY 68 56 Program to Demonstrate FINALLY clause 69 57 Program to Demonstrate User Defined EXCEPTIONS 70 58 Program to Demonstrate Throws 71 59 Program to Demonstrate MULTITHREADING 72 60 Program to Demonstrate Runnable Interface 74 61 Program to Demonstrate Thread Priorities 76 62 Program to Demonstrate Synchronized Block 78 63 Program to Demonstrate Synchronized Method 80 64 Program to Demonstrate Deadlock 82 65 Program to Demonstrate Thread Methods 84 66 Program to Create Threads using Thread Class 86 67 Program to Demonstrate Join() & isAlive() methods 88 68 Program to Show how to Get User Input from Keyboard 90 69 Program to Create a Frame Window using Applet 91 70 Program to Demonstrate Life cycle of methods in Applet 93 71 Program to display Parameters Passed from HTML 94 72 Program to Demonstrate all shapes in Graphics class 96 73 Program to Show a Hut,Mountains & Face 97 74 Program to Show Status of Applet Window 99 75 Program to Show Position of the Mouse 100 76 Program to Demonstrate Colors 102 77 Program to Pass Parameters perform Mathematical Operations 103

78 Program To Get Document Code Bases 104 79 Program to Show an Image 105 80 Program to demonstrate an Adapter 106 81 Program to Demonstrate Simple Banner 108 82 Program to Demonstrate Button 110 83 Program to Demonstrate Checkbox 112 84 Program to Demonstrate Radio Buttons (Checkbox Group) 114 85 Program to Demonstrate Choice 116

86 Program to Demonstrate File Dialog 117 87 Program to Demonstrate Labels 121 88 Program to Demonstrate Lists 122 89 Program to Demonstrate Menu 124 90 Program to Demonstrate Text Area 128 91 Program to Make a Login Window 129 92 Program to Make a Login Focus 131 93 Program to Demonstrate Mouse Adapter 133 94 Program to Demonstrate Mouse Events 134 95 Program to Demonstrate the key event handlers 136 96 Program to Demonstrate Border Layout 138 97 Program to Demonstrate Card Layout 139 98 Program to Test Fonts Using Mouse Events 141 99 Program to Demonstrate Grid Layout 143

100 Program to Demonstrate Scrollbar 144 101 Program to Check Connection to Database 146 102 Program to retrieve Records from Database 147 103 Program to demonstrate Insertion into Database 148 104 Program to demonstrate Update into Database 149 105 Program to demonstrate Prepared Statement 150 106 Program to Demonstrate Data Entry using Applet 151 107 Program to Demonstrate Result Set Meta Data 154 108 Program to Demonstrate Transaction handling 155 109 Program to Demonstrate Callable Statement 156 110 Program to Demonstrate Result Set Meta Data 157 111 Program to Demonstrate Database Meta Data 158 112 Program to add Interface 159 113 Program to add Server 159 114 Program to add Client 160 115 Program for implementation for the interface 161 116 Create a Policy to Allow Permission for Everyone 161

01 Program to Demonstrate simple JAVA program

class A

public static void main(String args[])

System.out.println("Welcome to my World");

-----------------------------------------------------------------------------------------

Save the above Program as A.java

Compile Program in Command by using javac

C:\>javac A.java

Run the Program in Command by using java

C:\>java A

---------------------------------------------------------------------------------------------

OUTPUT :

Welcome to my World

02 Program to compute the area of a circle

class A2

int r=10;

System.out.println("Radius of Circle :" + r);

System.out.println("Area of Circle :" + r*r);

OUTPUT :

Radius of Circle : 10

Area of Circle : 314

03 Program to demonstrate type casting in JAVA

class conversion

byte b;

int i=257;

double d=323.142;

System.out.println("\nConversion of int to byte.");

b=(byte) i;

System.out.println("i and b " +i+" "+b);

System.out.println("\nConversion of double to int.");

i=(int)d;

System.out.println("d and i " +d +" "+i);

System.out.println("\nConversion of double to byte.");

b=(byte)d;

System.out.println("d and b " +d + " " +b);

OUTPUT :

Conversion of int to byte.

i and b 257 1

Conversion of double to int.

d and i 323.142 323

Conversion of double to byte.

d and b 323.142 67

04 Program to demonstrate the basic Arithmetic Operations

class arith

int a=10,b=3;

System.out.println("sum is "+(a+b));

System.out.println("difference is "+(a-b));

System.out.println("product is "+(a*b));

System.out.println("quotient is "+(a/b));

System.out.println("remainder is "+(a%b));

OUTPUT :

sum is 13

difference is 7

product is 30

quotient is 3

remainder is 1

05 Program to find largest of three numbers

class large

int a=10,b=30,c=20;

System.out.println("Greatest of given 3 numbers");

if(a>b&&a>c)

System.out.println(+a);

else if(b>c)

System.out.println(+b);

System.out.println(+c);

OUTPUT :

Greatest of given 3 numbers

06 Program to print first 10 Fibonacci numbers

class fib

int i=9,f=0,s=1,temp;

System.out.println(+f);

while(i>0)

System.out.println(+s);

temp=f+s;

s=temp;

OUTPUT :

07 Program to Calculate the factorial of a number using RECURSION

class Factorial

int fact(int n)

int result;

if(n==1)

return 1;

result=fact(n-1)*n;

return result;

class Recursion

public static void main(String args[]){

Factorial f=new Factorial();

System.out.println("Factorial of 3 is " +f.fact(3));

OUTPUT :

Factorial of 3 is 6

Factorial of 4 is 24

Factorial of 5 is 120

08 Program to print prime numbers using CLA

class primecla

public static void main(String s[])

int n,r;

n=Integer.parseInt(s[0]);

for(int i=2;i<=n;i++)

int c=0;

for(int j=1;j<=i;j++)

r=i%j;

if (r==0)

if(c==2)

System.out.println(i);

OUTPUT :

java primecla 10

09 Program to Demonstrate Command Line Argument

class CommandLine

for(int i=0; i<args.length; i++)

System.out.println("args[" +i + "]: "+args[i]);

OUTPUT :

java CommandLine 1 3 4 2 5

args[0]: 1

args[1]: 3

args[2]: 4

args[3]: 2

args[4]: 5

10 Program to convert temperature from Fahrenheit to Celsius scale using CLA

class ftoccla

int f;

double c;

f=Integer.parseInt(s[0]);

c=5*(f-32)/9;

System.out.println(f+" fahrenheit = "+c+" celsius");

OUTPUT :

java ftoccla 34

34 fahrenheit = 1.0 celsius

11 Program to produce the conversion table for dollar and rupees using CLA

class dollarcla

int n,d;

System.out.println("Dollars\t\tRupees" );

d=Integer.parseInt(s[i]);

System.out.println(d+"\t=\t"+(d*45) );

OUTPUT :

java dollarcla 4 1 34 36 37

Dollars Rupees

1 = 45

34 = 1530

36 = 1620

37 = 1665

12 Program to print area of right angled triangle using CLA

class AreaTri

int a,b,area;

a=Integer.parseInt(s[0]);

b=Integer.parseInt(s[1]);

area=a*b/2;

System.out.println("Area of Right angled Triangle = "+area);

OUTPUT :

java AreaTri 5 4

Area of Right angled Triangle = 10

13 Program to print all the elements in an array using CLA

class matrixcla

int n,m;

System.out.println("The length of the matrix is: " +n);

System.out.println("The elements of the matrix are:");

m=Integer.parseInt(s[i]);

System.out.println(m);

OUTPUT :

java matrixcla 5 10 34 36 37 99

The length of the matrix is: 5

The elements of the matrix are:

14 Program to find the sum of all the elements in an array

class Sum

double nums[]={1.1,1.2,1.3,1.4,1.5};

double result=0;

System.out.println("The Elements of Array are :");

for(int i=0;i<5;i++)

System.out.println(nums[i]);

result=result+nums[i];

System.out.println("Sum is " + result);

OUTPUT :

The Elements of Array are :

Sum is 6.5

15 Program to print all the elements in a 2D array

class Matrix

int a[][]= {{1,2,3},{4,5,6}};

System.out.println("Number of Row= " + a.length);

System.out.println("Number of Column= " + a[1].length);

System.out.println("The elements of the matrix are : ");

for(int i = 0; i <a.length; i++)

for(int j = 0; j < a[1].length; j++)

System.out.print(" "+ a[i][j]);

System.out.println();

OUTPUT :

Number of Row= 2

Number of Column= 3

The elements of the matrix are :

16 Program to find the sum of two matrices

class addm

int a[][]={{1,2,3},{4,5,6},{7,8,9}};

int b[][]={{1,1,1},{0,1,0},{0,0,1}};

int c[][]= new int[3][3];

int i,j;

for(i=0;i<3;i++)

for( j=0;j<3;j++)

c[i][j]=a[i][j]+b[i][j];

for(i=0;i<3;i++)

for(j=0;j<3;j++)

System.out.print(+c[i][j]+ " ");

OUTPUT :

7 8 10

17 Program to find the difference of two matrices using CLA

class Matrixcla {

public static void main(String s[]) {

int a[][]=new int[2][2];

int b[][]=new int[2][2];

int x,y,k=0;

System.out.println("First Matrix : ");

for(int i = 0; i < 2; i++) {

for(int j = 0; j < 2; j++) {

x=Integer.parseInt(s[k]);

a[i][j]=x;

System.out.print(" "+ a[i][j]); }

System.out.println(); }

System.out.println("Second Matrix : ");

for(int i = 0; i <2; i++) {

for(int j = 0; j <2; j++) {

y=Integer.parseInt(s[k]);

b[i][j]=y;

System.out.print(" "+b[i][j]); }

System.out.println("Difference of two matrix : ");

for(int i = 0; i <2; i++) {

for(int j = 0; j <2; j++)

System.out.print(" "+(a[i][j]-b[i][j]));

OUTPUT :

java Matrixcla 6 7 8 9 5 5 5 5

First Matrix :

Second Matrix :

Difference of two matrix :

18 Program to print the UPPER and LOWER triangle of a matrix

class UppLow{

public static void main(String arsg[]) {

int a[][]={{1,2,3},{4,5,6},{7,8,9}};

System.out.println("the given matrix:");

for(int i=0;i<3;i++) {

for(int j=0;j<3;j++)

System.out.print(" "+a[i][j]);

System.out.println("upper triangle of matrix:");

for(int j=0;j<3;j++) {

if(i<=j)

System.out.print(a[i][j] + " ");

System.out.print(" "); }

System.out.println("lower triangle of matrix:");

for(int j=0;j<3;j++) {

if(i>=j)

System.out.print(" "); }

OUTPUT :

The given matrix:

Upper triangle of matrix:

Lower triangle of matrix:

19 Program to find the trace of a matrix

class Trace

int a[][]={{1,2,3},{4,5,6},{7,8,9}};

int i,j,sum=0;

System.out.println("The given matrix : ");

for(int i = 0; i <3; i++)

for(int j = 0; j <3; j++)

for(i=0;i<3;i++)

for(j=0;j<3;j++)

if(i==j)

sum=sum+a[i][j];

System.out.println("Trace is : " +sum);

OUTPUT :

The given matrix :

Trace is : 15

20 Program to find the transpose of a matrix

class Transpose

int a[][]={{1,2,3},{4,5,6},{7,8,9}};

int i,j;

System.out.println("The given matrix : ");

for(int i = 0; i <3; i++)

for(int j = 0; j <3; j++)

System.out.println("Transpose of Matrix : ");

for(i=0;i<3;i++)

for(j=0;j<3;j++)

System.out.print(a[j][i]+ " ");

OUTPUT :

The given matrix :

Transpose of Matrix :

21 Program to find the product of two matrices

class Mulm

int a[][]={{1,2,3},{4,5,6},{7,8,9}};

int b[][]={{1,1,1},{0,1,0},{0,0,1}};

int c[][]= new int[3][3];

int i,j,k;

for(i=0;i<3;i++)

for(j=0;j<3;j++)

for(k=0;k<3;k++)

c[i][j]=c[i][j]+a[i][k]*b[k][j];

for(i=0;i<3;i++)

for(j=0;j<3;j++)

System.out.print(+c[i][j]+ " ");

OUTPUT :

4 9 10

7 15 16

22 Program to demonstrate a CLASS

class Democlass //Defining a class

int a=34;//Instance Variable of the class

void showa() //Method of the class

System.out.println("a = " +a);

}//End of the class

class A

public static void main(String args[]) {

Democlass obj = new Democlass();

obj.showa();

OUTPUT :

23 Program to demonstrate a Constructor

class Box

double width;

double height;

double depth;

System.out.println("Constructing Box");

width=10;

height=10;

depth=10;

double volume()

return width*height*depth;

class BoxDemo6

Box mybox1=new Box();

double vol;

vol=mybox1.volume();

System.out.println("volume of is " +vol);

OUTPUT :

Constructing Box

volume of is 1000.0

24 Program to demonstrate a Parameterized Constructor

class Box

double width;

double height;

double depth;

Box(double w,double h,double d)

width=w;

height=h;

depth=d;

double volume()

class BoxDemo7

Box mybox1=new Box(10,20,15);

double vol;

OUTPUT :

volume of is 3000.0

volume of is 162.0

25 Program to Demonstrate THIS keyword

class Box

double width;

double height;

double depth;

Box(double width,double height,double depth)

this.width=width;

this.height=height;

this.depth=depth;

double volume()

return width* height* depth;

class BoxThis

double vol;

System.out.println("Volume is " +vol);

OUTPUT :

Volume is 3000.0

Volume is 162.0

26 Program to Demonstrate Constructor Overloading

class Box

double width;

double height;

double depth;

Box(double w,double h,double d)

width=w;

height=h;

depth=d;

width=-1;

height=-1;

depth=-1;

Box(double len)

width=height=depth=len;

double volume()

class OverloadCons

Box mycube=new Box(7);

double vol;

System.out.println("volume of mybox1 is " +vol);

System.out.println("volume of mybox2 is " +vol);

vol=mycube.volume();

System.out.println("volume of mycube is " +vol);

OUTPUT :

volume of mybox1 is 3000.0

volume of mybox2 is -1.0

volume of mycube is 343.0

27 Program to pass objects as parameters

class Test

int a,b;

Test(int i,int j)

boolean equals(Test o)

if(o.a==a && o.b==b) return true;

else return false;

class PassOb

Test ob1=new Test(100,22);

Test ob2=new Test(100,22);

Test ob3=new Test(-1,-1);

System.out.println("ob1 == ob2 : " +ob1.equals(ob2));

System.out.println("ob1 == ob3 : " +ob1.equals(ob3));

OUTPUT :

ob1 == ob2 : true

ob1 == ob3 : false

28 Program to Demonstrate Queue using Class

class A

int q[] = new int[10];

int f,s;

f =-1;

void push(int item)

if(f==9)

System.out.println("Queue is Full");

q[++f]=item;

int pop()

if(f==s)

System.out.println("Queue is Underflow");

return 0;

return q[++s];

class que{

A obj1 = new A();

obj1.push(i);

System.out.println("Queue elements are : ");

for(int i = 0 ;i<10;i++)

System.out.println(obj1.pop());

OUTPUT :

Queue elements are :

29 Program to Demonstrate Stack using Class

class A

int s[] = new int[10];

int tos;

tos=-1;

void push(int item)

if(tos==9)

System.out.println("Stack is Full");

s[++tos]=item;

int pop()

if(tos<0)

System.out.println("Stack is Underflow");

return 0;

return s[tos--];

class stack{

A obj1 = new A();

obj1.push(i);

System.out.println("Stack elements are : ");

for(int i = 0 ;i<10;i++)

System.out.println(obj1.pop());

OUTPUT :

Stack elements are :

30 Program to Demonstrate Access Specifiers

class Test

int a;

public int b;

private int c;

void setc(int i)

int getc() {

return c;

class AcessTest

Test ob=new Test();

//These are OK,a and b may be accessed directly

ob.a=10;

ob.b=20;

//This is not OK and will cause an error

//ob.c=100; //error!

//you must access c through its methods

ob.setc(100); //Ok

System.out.println("a,b,and c: " +ob.a+" " +ob.b +" "+ob.getc());

OUTPUT :

a,b,and c: 10 20 100

31 Program to Demonstrate Static Variables

class Test

static int count;

static

System.out.println("Welcome");

count=0;

Test()

count++;

class Teststaticvariable

Test t1=new Test();

Test t2=new Test();

Test t3=new Test();

System.out.println(Test.count + " objects are created");

OUTPUT :

Welcome

3 objects are created

32 Program to Demonstrate Static Methods

class Mymath

static int add(int x,int y)

return(x+y);

static int subtract(int x,int y)

return (x-y);

static int square(int x)

return (x*x);}

class demostaticmethod

System.out.println(Mymath.add(100,100));

System.out.println(Mymath.subtract(200,100));

System.out.println(Mymath.square(5));

OUTPUT :

33 Program to demonstrate an Inner class

class Outer

int outer_x=100;

void test()

Inner inner=new Inner();

inner.display();

class Inner

void display()

System.out.println("display: outer_x= "+outer_x);

class InnerClassDemo

Outer outer=new Outer();

outer.test();

OUTPUT :

display: outer_x= 100

34 Program to Demonstrate Type Wrapping

class Wrap {

Integer obj = new Integer(34);

int x = obj.intValue();

System.out.println("x = " +x);

System.out.println("obj = " +obj);

OUTPUT :

x = 34

obj = 34

35 Program to Demonstrate Single Inheritance

class A

int i,j;

void showij()

System.out.println("i and j : " +i+ " " +j);

class B extends A

int k;

void showk()

System.out.println("k : "+k);

void sum()

System.out.println("i+j+k: "+(i+j+k));

class SimpleInheritance

A superob = new A();

B subob = new B();

superob.i=10;

superob.j=20;

System.out.println("Contents of superob: ");

superob.showij();

subob.i=7;

subob.j=8;

subob.k=9;

System.out.println("Contents of subob: ");

subob.showij();

System.out.println("Sum of i,j & k in subob: ");

subob.sum();

OUTPUT :

Contents of superob:

i and j : 10 20

Contents of subob:

i and j : 7 8

Sum of i,j & k in subob:

i+j+k: 24

36 Program to Demonstrate Multilevel Inheritance

class Student

int rollno;

void getroll(int a)

rollno=a;

void putroll()

System.out.println("Roll number : "+rollno);

class Test extends Student //first level inheritence

int marks1,marks2;

void getmarks(int x,int y)

marks1=x;

marks2=y;

void putmarks()

System.out.println("Marks in subject1 = "+marks1);

System.out.println("Marks in subject2 = "+marks2);

class Result extends Test //second level derivation

float total;

void display()

total=marks1+marks2;

putroll();

putmarks();

System.out.println("Total = "+total);

class Multilevel

Result student1 = new Result(); //object of class result is created

student1.getroll(34);

student1.getmarks(40,99);

student1.display();

OUTPUT :

Roll number : 34

Marks in subject1 = 40

Marks in subject2 = 99

Total = 139.0

37 Program to Demonstrate hierarchical Inheritance

class Student

int roll;

void getroll(int x)

roll=x;

void putroll()

System.out.println(roll);

class Result1 extends Student

int marks1;

void getmarks1(int y)

marks1=y;

void showmarks1()

System.out.print("Roll no of 1st student is = ");

putroll();

System.out.println("Marks of 1st student is = "+marks1);

class Result2 extends Student {

int marks2;

void getmarks2(int z)

marks2=z;

void showmarks2()

System.out.print("Rollno of 2nd student is = ");

putroll();

System.out.println("Marks of 2nd student is = "+marks2);

class Hierarchial

Result1 r1 = new Result1();

Result2 r2 = new Result2();;

r1.getroll(36);

r1.getmarks1(99);

r1.showmarks1();

r2.getroll(34);

r2.getmarks2(40);

r2.showmarks2();

OUTPUT :

Roll no of 1st student is = 36

Marks of 1st student is = 99

Rollno of 2nd student is = 34

Marks of 2nd student is = 40

38 Program to Demonstrate SUPER Class variable to reference a sub class object

class A {

int i,j;

A(int a,int b) {

void show() {

System.out.println("i and j: " +i + " " +j);

class B extends A {

int k;

B(int a,int b,int c) {

super(a,b);

k=c; }

void show() {

System.out.println("k: "+k);

class Supref {

B subOb=new B(1,2,3);

a=subOb;

System.out.println("Using Sub Class Object :");

subOb.show();

System.out.println("Using Super class Variable : ");

a.show();

OUTPUT :

Using Sub Class Object :

Using Super class Variable :

39 Program to Demonstrate Method Overriding

class A {

int i,j;

A(int a,int b)

void show() {

class B extends A {

int k;

B(int a,int b,int c)

super(a,b);

void show()

class Override {

subOb.show();

OUTPUT :

40 Program to Demonstrate Runtime Polymorphism

class figure

double dim1;

double dim2;

figure(double a,double b)

dim1=a;

dim2=b;

double area()

System.out.println("area for figure is undefined");

return 0;

class rectangle extends figure

rectangle(double a,double b)

super(a,b);

double area()

System.out.println("Inside Area for rectangle");

return dim1*dim2;

class triangle extends figure {

triangle(double a,double b)

super(a,b);

double area()

System.out.println("Inside area for triangle");

return (dim1*dim2)/2;

class FindAreas {

figure f=new figure(10,10);

rectangle r=new rectangle(9,5);

triangle t=new triangle(10,8);

figure figref;

figref=r;

System.out.println("Area is " +figref.area());

figref=t;

figref=f;

OUTPUT :

Inside Area for rectangle

Area is 45.0

Inside area for triangle

Area is 40.0

area for figure is undefined

Area is 0.0

41 Program to Demonstrate Abstract Class

abstract class A

abstract void callme();

void callmetoo(){

System.out.println("this is a concrete method.");

class B extends A

void callme()

System.out.println("B's implementation of callme.");

class AbstractDemo

B b=new B();

b.callme();

b.callmetoo();

OUTPUT :

B's implementation of callme.

this is a concrete method.

42 Program to Demonstrate FINAL Keyword

class A

final int x =3;

int y;

//x=4;this results in error

class Finaldemo {

A a = new A();

System.out.println("x = " +a.x);

System.out.println("y = " +a.y);

//a.x=5;this also results in error

a.y=6;

System.out.println("x = " +a.x);

System.out.println("y = " +a.y);

OUTPUT :

43 Program to Demonstrate FINAL Method

class A {

int i,j;

A(int a,int b) {

void show() {

final void display() //Cannot be Overriden

class B extends A {

int k;

B(int a,int b,int c) {

super(a,b);

void show() {

class Finalmeth {

System.out.println("Overriden Method call :");

subOb.show();

System.out.println("Final Method call :");

subOb.display();

OUTPUT :

Overriden Method call :

Final Method call :

i and j: 1 2

44 Program to Demonstrate FINAL Class

final class Democlass //Cannot be inherited

int a=34;

void showa()

System.out.println("a = " +a);

class A

Democlass obj = new Democlass();

obj.showa();

OUTPUT :

45 Program to Demonstrate INTERFACE

interface Sum // defining Interface

int z=2;//final variable declared

int add();//Abstract Method declared

class A implements Sum // Class implementing Interface

int x,y;

public int add() {

return x+y+z;

class InterfaceDemo

A a = new A();

a.x=14;

a.y=18;

System.out.println("Sum : " +a.add());

OUTPUT :

Sum : 34

46 Program to access implementation through Interface references

interface figure

double area();

class rectangle implements figure

double dim1,dim2;

rectangle(double a,double b)

dim1=a;dim2=b;

public double area()

return dim1*dim2;

class triangle implements figure

double dim1,dim2;

triangle(double a,double b)

dim1=a;dim2=b;

public double area()

return (dim1*dim2)/2;

}//implements through interface

class demo

rectangle r=new rectangle(100,50);

triangle t=new triangle(10,20);

figure f;

System.out.println(f.area());

OUTPUT :

5000.0

47 Program to Demonstrate EXTENDING INTERFACE

interface A {

void meth1();

void meth2();

interface B extends A {

void meth3();

class Myclass implements B {

public void meth1() {

System.out.println("method1");

class Extint {

Myclass m = new Myclass();

m.meth1();

m.meth2();

m.meth3();

Output :

method1

method2

method3

48 Program to Demonstrate Stack using interface

interface stack

void push(int item);

int pop();

class A implements stack

int s[];

int tos;

A(int size)

s = new int[size];

tos = -1;

public void push(int item)

if(tos == s.length-1)

System.out.println("STACK is FULL");

s[++tos]=item;

public int pop()

if(tos<0)

System.out.println("STACK IS EMPTY");

return 0;

return s[tos--];

class S {

int i;

A stack1 = new A(5);

for(i=0;i<5;i++)

stack1.push(i);

System.out.println("Stack elements are : ");

for(i =0;i<5;i++)

System.out.println(stack1.pop());

OUTPUT :

Stack elements are :

49 Program to Demonstrate Queue using Interface

interface queue

void push(int item);

int pop();

class B implements queue

int s[];

int f,l;

B(int size)

s = new int[size];

f = -1;

l = -1;

public void push(int item)

if(f == s.length-1)

System.out.println("Q is FULL");

s[++f]=item;

public int pop()

if(f==l)

System.out.println(" Q iS EMPTY");

return 0;

return s[++l];

class Q

int i;

B q1=new B(8);

for(i=0;i<8;i++)

q1.push(i);

System.out.println("Queue elements are : ");

for(i =0;i<8;i++)

System.out.println(q1.pop());

OUTPUT :

Queue elements are :

50 Program to Demonstrate a SIMPLE PACKAGE

package MyPack;

public class Balance {

String name;

double bal;

public Balance(string n,double b) {

name=n;

bal=b;

public void show() {

if(bal<0)

System.out.println("-->");

System.out.println(name+ ": $"+bal);

--------------------------------------------------------------------------------------------------------

import MyPack.*;

class TestBalance

public static void main(string args[])

BalanceTest=new Balance("Uday Satya",500);

test.show();

OUTPUT :

Uday Satya : $500

51 Program to Demonstrate Exception

class Excep

static void meth1()

int d=0;

int a=10/d;

public static void main(String a[])

Excep.meth1();

OUTPUT :

Exception in thread "main" java.lang.ArithmeticException: / by zero

at Excep.meth1(Excep.java:6)

at Excep.main(Excep.java:10)

52 Program to Demonstrate TRY CATCH

class TC

int c[]={2,4,6,8};

c[34]=99;

catch(ArrayIndexOutOfBoundsException e)

System.out.println("Array Index Out Of Bound "+e);

OUTPUT :

Array Index Out Of Bound java.lang.ArrayIndexOutOfBoundsException: 34

53 Program to CATCH ARITHMETIC Exceptions

class trysimple

int d,a;

d = 0;

a = 42/d;

System.out.println("This will not Display");

catch(ArithmeticException e)

System.out.println("Division by zero");

System.out.println("After try/Catch Statements");

OUTPUT :

Division by zero

After try/Catch Statements

54 Program to demonstrate Multiple CATCH

class trydemo1

int l=args.length;

System.out.println("l = " +l);

int b = 34/l;

int c[]={0};

c[34]=100;

System.out.println("End of Try Block");

System.out.println("Please Enter Command line Arguments");

System.out.println("Your Array size is small");

catch(Exception e)

System.out.println("Other type of Exception");

OUTPUT :

Please Enter Command line Arguments

55 Program to demonstrate NESTED TRY

class NestTry

int a = args.length;

int b = 42 /a;

System.out.println("a = "+ a);

if(a==1) a = a/(a-a);

if (a==2) {

int c[] = {1};

c[42] = 99;

} catch(ArrayIndexOutOfBoundsException e) {

System.out.println("Array index out-of-bounds:"+e);

} catch(ArithmeticException e) {

System.out.println("Divide by 0:"+e);

OUTPUT :

Divide by 0:java.lang.ArithmeticException: / by zero

56 Program to demonstrate FINALLY clause

class trydemo{

int l=args.length;

System.out.println("l = " +l);

int b = 34/l;

int c[]={0};

c[34]=100;

System.out.println("End of Try Block");

System.out.println("Please Enter Command line Arguments");

System.out.println("Your Array size is small");

catch(Exception e)

System.out.println("Other type of Exception");

finally{

System.out.println("This will be executed");

OUTPUT :

Please Enter Command line Arguments

This will be executed

57 Program to Demonstrate User Defined EXCEPTIONS

class Myexception extends Exception {

private int d;

Myexception(int a)

public String toString() {

return "Myexception["+d+"]";

class UserExcep {

static void compute(int a) throws Myexception {

System.out.println("called compute("+a+")");

if(a>50)

throw new Myexception(a);

System.out.println("normal exit");

compute(34);

compute(99);

catch(Myexception e)

System.out.println("caught "+e);

OUTPUT :

called compute(34)

normal exit

called compute(99)

caught Myexception[99]

58 Program to Demonstrate Throws

class ThrowsDemo

static void throwOne() throws IllegalAccessException

System.out.println("Inside throwOne.");

throw new IllegalAccessException("demo");

throwOne();

catch (IllegalAccessException e)

System.out.println("Caught "+e);

OUTPUT :

Inside throwOne.

Caught java.lang.IllegalAccessException: demo

59 Program to demonstrate MULTITHREADING

class A extends Thread

public void run()

for(int i=1;i<=5;i++)

System.out.println("\tfrom Thread A : i = " +i);

System.out.println("Exit from A");

class B extends Thread

public void run()

for(int j=1;j<=5;j++)

System.out.println("\tfrom Thread B : j = " +j);

System.out.println("Exit from B");

class C extends Thread

public void run()

for(int k=1;k<=5;k++)

System.out.println("\tfrom Thread C : k = " +k);

System.out.println("Exit from C");

class Threadtest

new A().start();

new B().start();

new C().start();

Thread.sleep(10);

catch(InterruptedException e){

System.out.println("Exception " +e);

OUTPUT :

from Thread A : i = 1

Exit from A

from Thread B : j = 1

from Thread C : k = 1

Exit from B

Exit from C

60 Program to Demonstrate Runnable Interface

class A implements Runnable

public void run()

class B implements Runnable

public void run()

class C implements Runnable{

public void run(){

class Runnabletest{

A a = new A();

B b = new B();

C c = new C();

Thread t1 = new Thread(a);

t1.start();

Thread t2 = new Thread(b);

t2.start();

Thread t3 = new Thread(c);

t3.start();

Thread.sleep(10);

catch(InterruptedException e){

OUTPUT :

Exit from A

Exit from B

Exit from C

61 Program to Demonstrate Thread Priorities

public void run()

class B extends Thread{

public void run(){

class C extends Thread{

public void run(){

class Prioritytest {

A a = new A();

B b = new B();

C c = new C();

c.setPriority(Thread.MAX_PRIORITY);

b.setPriority(a.getPriority()+1);

a.setPriority(Thread.MIN_PRIORITY);

a.start();

b.start();

c.start();

OUTPUT :

Exit from C

Exit from B

Exit from A

62 Program to Demonstrate Synchronized Block

class Callme

void call(String msg)

System.out.print("[" +msg);

Thread.sleep(1000);

catch(InterruptedException e)

System.out.println("Interrupted");

System.out.println("]");

class Caller implements Runnable

String msg;

Callme target;

Thread t;

public Caller(Callme targ, String s)

target=targ;

msg=s;

t=new Thread(this);

t.start();

public void run()

synchronized(target) {

target.call(msg);

class SynchBlock

Callme target=new Callme();

Caller ob1=new Caller(target, "Hello");

Caller ob2=new Caller(target, "Synchronized");

Caller ob3=new Caller(target, "World");

ob1.t.join();

ob2.t.join();

ob3.t.join();

OUTPUT :

[Hello]

[Synchronized]

[World]

63 Program to Demonstrate Synchronized Method

class Callme

synchronized void call(String msg)

System.out.print("[" +msg);

Thread.sleep(1000);

System.out.println("]");

class Caller implements Runnable

String msg;

Callme target;

Thread t;

public Caller(Callme targ, String s)

target=targ;

msg=s;

t=new Thread(this);

t.start();

public void run()

target.call(msg);

class SynchMeth

Callme target=new Callme();

Caller ob1=new Caller(target, "Hello");

Caller ob2=new Caller(target, "Synchronized");

Caller ob3=new Caller(target, "World");

ob1.t.join();

ob2.t.join();

ob3.t.join();

OUTPUT :

[Hello]

[Synchronized]

[World]

64 Program to Demonstrate Deadlock

class A {

synchronized void foo(B b) {

String name=Thread.currentThread().getName();

System.out.println(name+ " entered A.foo");

Thread.sleep(1000);

catch(Exception e) {

System.out.println("A Interrupted");

System.out.println(name+ " trying to call B.last()");

b.last();

synchronized void last()

System.out.println("Inside A.last");

class B {

synchronized void bar(A a) {

String name=Thread.currentThread().getName();

System.out.println(name+ " entered B.bar");

Thread.sleep(1000);

catch(Exception e) {

System.out.println("B Interrupted");

System.out.println(name+ " trying to call A.last()");

a.last();

synchronized void last() {

System.out.println("Inside A.last");

class Deadlock implements Runnable

A a=new A();

B b=new B();

Deadlock()

Thread.currentThread().setName("mainThread");

Thread t=new Thread(this, "RacingThread");

t.start();

a.foo(b);

System.out.println("Back in main thread");

public void run()

b.bar(a);

System.out.println("Back in other thread");

new Deadlock();

OUTPUT :

mainThread entered A.foo

RacingThread entered B.bar

mainThread trying to call B.last()

RacingThread trying to call A.last()

65 Program to Demonstrate Thread Methods

class Q {

int n;

boolean valueSet= false;

synchronized int get() {

if(!valueSet)

wait();

catch(InterruptedException ie) {

System.out.println("InterruptedException caught");

System.out.println("Got: " + n);

valueSet=false;

notify();

return n;

synchronized void put(int n) {

if(valueSet)

wait();

catch(InterruptedException ie) {

System.out.println("InterruptedException caught");

this.n=n;

valueSet=true;

System.out.println("Put: " + n);

notify();

class Producer implements Runnable {

Producer(Q q) {

this.q=q;

new Thread(this, "Producer").start();

public void run() {

int i=0;

while(true) {

q.put(i++);

class Consumer implements Runnable {

Consumer(Q q) {

this.q=q;

new Thread(this, "Consumer").start();

public void run() {

int i=0;

while(true) {

q.get();

class PCFixed {

Q q=new Q();

new Producer(q);

new Consumer(q);

System.out.println("Press Control-C to stop.");

OUTPUT :

Put : 1

Got : 1

Put : 2

Got : 2

Put : 3

Got : 3

Put : 4

Got : 4

Put : 5

Got : 5

66 Program to Create Threads using Thread Class

public void run()

class B extends Thread

public void run()

class Threadtest

new A().start();

new B().start();

Thread.sleep(10);

OUTPUT :

Exit from A

Exit from B

67 Program to Demonstrate Join() & isAlive() methods

class NewThread implements Runnable {

String name;

Thread t;

NewThread(String threadname) {

name=threadname;

t= new Thread(this,name);

System.out.println("New Thread: "+t);

t.start();

public void run() {

for(int i=5;i>0;i--) {

System.out.println(name + ": " +i);

Thread.sleep(1000);

catch (InterruptedException ie) {

System.out.println(name + "interrupted."); }

System.out.println(name + "exiting.");

class DemoJoin {

NewThread ob1= new NewThread("One");

NewThread ob2= new NewThread("Two");

NewThread ob3= new NewThread("Three");

System.out.println("Thread One is alive: "+ ob1.t.isAlive());

System.out.println("Thread Two is alive: "+ ob2.t.isAlive());

System.out.println("Thread Three is alive: "+ ob3.t.isAlive());

System.out.println("Waiting for threads to finish.");

ob1.t.join();

ob2.t.join();

ob3.t.join();

catch (InterruptedException ie) {

System.out.println("Main thread Interrupted"); }

System.out.println("Thread One is alive: "+ ob1.t.isAlive());

System.out.println("Thread Two is alive: "+ ob2.t.isAlive());

System.out.println("Thread Three is alive: "+ ob3.t.isAlive());

System.out.println("Main thread exiting.");

OUTPUT :

New Thread: Thread[One,5,main]

New Thread: Thread[Two,5,main]

One: 5

Two: 5

New Thread: Thread[Three,5,main]

Thread One is alive: true

Three: 5

Thread Two is alive: true

Thread Three is alive: true

Waiting for threads to finish.

Two: 4

One: 4

Three: 4

Two: 3

One: 3

Three: 3

Two: 2

One: 2

Three: 2

Two: 1

One: 1

Three: 1

Twoexiting.

Oneexiting.

Threeexiting.

Thread One is alive: false

Thread Two is alive: false

Thread Three is alive: false

Main thread exiting.

68 Program to Demonstrate Get User Input from Keyboard

import java.io.*;

class GetUserInput

public static void main(String[] args)

//the data that will be entered by the user

String name;

//an instance of the BufferedReader class

//will be used to read the data

BufferedReader reader;

//specify the reader variable

//to be a standard input buffer

reader = new BufferedReader(new InputStreamReader(System.in));

//ask the user for their name

System.out.print("What is your name? ");

//read the data entered by the user using

//the readLine() method of the BufferedReader class

//and store the value in the name variable

name = reader.readLine();

//print the data entered by the user

System.out.println("Your name is " + name);

catch (IOException ioe){

//statement to execute if an input/output exception occurs

System.out.println("An unexpected error occured.");

OUTPUT :

What is your name? Uday Satya

Your name is Uday Satya

69 Program to Create a Frame Window using Applet

import java.awt.*;

import java.awt.event.*;

import java.applet.*;

</applet>

class FrameTest extends Frame {

FrameTest(String title) {

super(title);

MyWindowAdapter adap=new MyWindowAdapter(this);

addWindowListener(adap);

public void paint(Graphics g) {

g.drawString("This is in frame window",10,40);

class MyWindowAdapter extends WindowAdapter {

FrameTest ft;

public MyWindowAdapter(FrameTest ft) {

this.ft=ft;

public void WindowClosing(WindowEvent we) {

ft.setVisible(false);

public class AppletFrameWindowEx1 extends Applet {

Frame f;

public void init() {

f=new FrameTest("A frame Window");

f.setSize(300,300);

f.setVisible(true);

public void start() {

f.setVisible(true);

public void stop() {

f.setVisible(false);

g.drawString("This is a Test applet",10,20);

70 Program to Demonstrate Life cycle of methods in Applet

import java.awt.*;

</applet>*/

public class Sample extends Applet {

String msg;

setBackground(Color.cyan);

setForeground(Color.red);

msg="Inside init()--";

msg +="Inside start()--";

msg +="Inside paint()--";

g.drawString(msg,10,30);

71 Program to display Parameters of HTML

import java.awt.*;

</applet>

public class ParamDemo extends Applet {

String fontName;

int fontSize;

float leading;

boolean active;

String param;

fontName=getParameter("fontName");

if(fontName==null)

fontName="Not Found";

param=getParameter("fontSize");

if(param != null)

fontSize=Integer.parseInt(param);

fontSize=0;

catch(NumberFormatException e) {

fontSize=-1;

param = getParameter("leading");

if(param != null)

leading = Float.valueOf(param).floatValue();

leading=0;

catch(NumberFormatException e) {

leading=-1;

param=getParameter("accountEnabled");

if(param != null)

active = Boolean.valueOf(param).booleanValue();

g.drawString("Font name: "+fontName,0,10);

g.drawString("Font size: "+fontSize,0,26);

g.drawString("Leading: "+leading,0,42);

g.drawString("Account Active: "+active,0,58);

72 Program to Demonstrate all shapes in Graphics class

import java.awt.*;

</applet>

public class FigPaint extends Applet

public void paint(Graphics g)

g.drawLine(0,0,100,100);

g.drawRect(10,10,60,50);

g.fillRect(100,10,60,50);

g.drawOval(10,10,50,50);

g.fillOval(100,10,75,50);

g.drawArc(10,40,70,70,0,75);

g.fillArc(100,40,70,70,0,75);

73 Program to Show a Hut,Mountains & Face

import java.awt.*;

</applet>

public class house extends Applet

setBackground(Color.black);

setForeground(Color.white);

g.drawLine(330,220,400,120);

g.drawLine(400,120,470,220);

g.drawLine(349,200,349,300);

g.drawLine(450,200,450,300);

g.drawLine(349,300,450,300);

g.drawRect(385,260,20,40);

g.drawRect(420,220,15,15);

g.fillOval(80,50,40,40);

setBackground(Color.black);

g.drawLine(20,380,60,130);

g.drawLine(60,130,100,360);

g.drawLine(100,360,140,140);

g.drawLine(140,140,180,340);

g.drawLine(180,340,220,150);

g.drawLine(220,150,260,320);

g.drawLine(260,320,315,165);

g.drawLine(315,165,335,210);

g.drawOval(330,350,130,40);

g.drawOval(550,60,60,60);

g.drawOval(565,80,10,10);

g.drawOval(585,80,10,10);

g.drawArc(566,81,30,30,0,-180);

g.drawLine(580,120,580,300);

g.drawLine(520,190,580,160);

g.drawLine(580,160,640,190);

g.drawLine(530,340,580,300);

g.drawLine(580,300,630,340);

74 Program to Show Status of Applet Window

import java.awt.*;

</applet>

public class StatusWindow extends Applet {

g.drawString("This is in the applet window.",10,20);

showStatus("This is shown in the status window.");

75 Program to Show Position of the Mouse in Applet Window

import java.awt.*;

public class AppWindow extends Frame {

String keymsg = "";

String mousemsg = "";

int mouseX=30, mouseY=30;

public AppWindow()

addKeyListener(new MyKeyAdapter(this));

addMouseListener(new MyMouseAdapter(this));

addWindowListener(new MyWindowAdapter());

g.drawString(keymsg,10,40);

g.drawString(mousemsg,mouseX,mouseY);

AppWindow appwin=new AppWindow();

appwin.setSize(new Dimension(400,200));

appwin.setTitle("an AWT-Based Application");

appwin.setVisible(true);

class MyKeyAdapter extends KeyAdapter

AppWindow appWindow;

public MyKeyAdapter(AppWindow appWindow)

this.appWindow=appWindow;

public void keyTyped(KeyEvent ke) {

appWindow.keymsg +=ke.getKeyChar();

appWindow.repaint();

class MyMouseAdapter extends MouseAdapter {

AppWindow appWindow;

public MyMouseAdapter(AppWindow appWindow) {

this.appWindow=appWindow;

public void mousePressed(MouseEvent me) {

appWindow.mouseX=me.getX();

appWindow.mouseY=me.getY();

appWindow.mousemsg="Mouse Down at "+appWindow.mouseX +", "+appWindow.mouseY;

appWindow.repaint();

class MyWindowAdapter extends WindowAdapter {

public void windowClosing(WindowEvent we) {

System.exit(0);

76 Program to Demonstrate Colors

import java.awt.*;

</applet>

public class Colordemo extends Applet{

public void paint(Graphics g){

Color c1 = new Color(255,100,100);

g.setColor(c1);

g.drawLine(110,50,100,100);

g.drawLine(130,100,100,40);

g.setColor(c2);

g.fillRect(60,120,50,50);

g.setColor(c3);

g.fillOval(20,30,70,70);

g.setColor(Color.black);

g.fillRect(120,50,180,90);

77 Program to Pass Parameters perform Mathematical Operations

import java.awt.*;

/*<APPLET CODE = "HelloJavaParam1.class" WIDTH=400 HEIGHT=200>

</APPLET>*/

public class HelloJavaParam1 extends Applet {

int a,b;

a=Integer.parseInt(getParameter("num1")); //recieving parameter value

b=Integer.parseInt(getParameter("num2")); //recieving parameter value

g.drawString(" a = "+a +" b = "+b,20,50);

g.drawString("Mathematical Operation",20,70);

g.drawString("Sum = "+(a+b),20,100);

g.drawString("Difference = "+(a-b),20,120);

g.drawString("Product = "+(a*b),20,140);

g.drawString("Mod = "+(a%b),20,160);

78 Program To Get Document Code Bases

import java.awt.*;

import java.net.*;

</applet>

public class Bases extends Applet{

// Display code and document bases.

String msg;

URL url = getCodeBase(); // get code base

msg = "Code base: " + url.toString();

g.drawString(msg, 10, 20);

url = getDocumentBase(); // get document base

msg = "Document base: " + url.toString();

79 Program to Show an Image

import java.awt.*;

</applet>

public class DrawImageApp extends Applet {

Image i;

public void start()

i = getImage(getDocumentBase(),"sunflower.jpg");

g.drawImage(i,50,50,this);

80 Program to Show an Image

import java.awt.*;

</applet>

public class SimpleBanner extends Applet implements Runnable

String msg = " A Simple Moving Banner.";

Thread t = null;

int state;

boolean stopFlag;

// Set colors and initialize thread.

setForeground(Color.red);

// Start thread

t = new Thread(this);

stopFlag = false;

t.start();

// Entry point for the thread that runs the banner.

public void run() {

char ch;

// Display banner

for( ; ; ) {

repaint();

Thread.sleep(250);

ch = msg.charAt(0);

msg = msg.substring(1, msg.length());

msg += ch;

if(stopFlag)

break;

} catch(InterruptedException e) {}

// Pause the banner.

stopFlag = true;

t = null;

// Display the banner.

81 Program to demonstrate an Adapter

import java.awt.*;

</applet>

public class AdapterDemo extends Applet {

addMouseMotionListener(new MyMouseMotionAdapter(this));

class MyMouseAdapter extends MouseAdapter{

AdapterDemo adapterDemo;

public MyMouseAdapter(AdapterDemo adapterDemo) {

this.adapterDemo = adapterDemo;

public void mouseClicked(MouseEvent me) {

adapterDemo.showStatus("Mouse clicked");

class MyMouseMotionAdapter extends MouseMotionAdapter{

AdapterDemo adapterDemo;

public MyMouseMotionAdapter(AdapterDemo adapterDemo) {

this.adapterDemo = adapterDemo;

public void mouseDragged(MouseEvent me) {

adapterDemo.showStatus("Mouse dragged");

82 Program to Demonstrate Button

import java.awt.*;

/*<applet code=demobutton.class height=200 width=400>

</applet>*/

public class demobutton extends Applet implements ActionListener

String msg="";

Button b1,b2;

public void init()

b1=new Button("OK");

b2=new Button("CANCEL");

add(b1);

add(b2);

b1.addActionListener(this);

public void actionPerformed(ActionEvent e)

String s=e.getActionCommand();

if(s.equals("OK"))

msg="You pressed OK";

msg="You pressed CANCEL";

repaint();

83 Program to Demonstrate Checkbox

import java.awt.*;

/*<applet code=democheckbox.class height=200 width=400>

</applet>*/

public class democheckbox extends Applet implements ItemListener {

String msg="";

Checkbox c1,c2,c3;

c1=new Checkbox("JAVA",null,true);

c2=new Checkbox("VB");

c3=new Checkbox("ORACLE");

add(c1);

add(c2);

add(c3);

c1.addItemListener(this);

public void itemStateChanged(ItemEvent e) {

repaint();

msg="JAVA:"+c1.getState();

msg="VB:"+c2.getState();

msg="ORACLE:"+c3.getState();

84 Program to Demonstrate Radio Buttons (CheckboxGroup)

import java.awt.*;

/*<applet code=democheckboxgrp.class height=200 width=400>

</applet>*/

public class democheckboxgrp extends Applet implements ItemListener {

String msg="";

Checkbox c1,c2,c3;

CheckboxGroup cg;

cg=new CheckboxGroup();

c1=new Checkbox("JAVA",cg,true);

c2=new Checkbox("VB",cg,false);

c3=new Checkbox("ORACLE",cg,false);

add(c1);

add(c2);

add(c3);

repaint();

msg="curently selected:"+cg.getSelectedCheckbox().getLabel();

85 Program to Demonstrate Choice

import java.awt.*;

/*<applet code=demochoice.class height=200 width=400>

</applet>*/

public class demochoice extends Applet implements ItemListener {

Choice c;

c=new Choice();

c.addItem("Red");

c.addItem("Green");

c.addItem("Blue");

add(c);

c.addItemListener(this); }

String st=c.getSelectedItem();

if(st.equals("Red")) {

setBackground(Color.red); }

if(st.equals("Green")) {

setBackground(Color.green); }

if(st.equals("Blue")) {

setBackground(Color.blue);}}}

86 Program to Demonstrate File Dialog

import java.awt.*;

/*<applet code=DemoMenu width=400 height=200>

</applet>*/

class TestMenu extends Frame {

String msg="";

CheckboxMenuItem workoff;

TestMenu(String title) {

super(title);

MenuBar mbar=new MenuBar();

setMenuBar(mbar);

Menu file=new Menu("File");

MenuItem i1,i2,i3,i4,i5;

file.add(i1=new MenuItem("New...."));

file.add(i2=new MenuItem("Open...."));

file.add(i3=new MenuItem("Save...."));

file.add(i4=new MenuItem("-"));

file.add(i5=new MenuItem("Quit...."));

mbar.add(file);

Menu edit=new Menu("Edit");

MenuItem i6,i7,i8,i9;

edit.add(i6=new MenuItem("Cut...."));

edit.add(i7=new MenuItem("Copy...."));

edit.add(i8=new MenuItem("Paste...."));

edit.add(i9=new MenuItem("-"));

Menu submenu1=new Menu("Text Size...");

MenuItem i10,i11;

submenu1.add(i10=new MenuItem("Large...."));

submenu1.add(i11=new MenuItem("Small...."));

edit.add(submenu1);

workoff=new CheckboxMenuItem("Work Offline");

edit.add(workoff);

mbar.add(edit);

Mymenuhandler handler=new Mymenuhandler(this);

i1.addActionListener(handler);

workoff.addItemListener(handler);

if(workoff.getState())

g.drawString("Checked",10,200);

g.drawString("Unchecked",10,200);

class Mymenuhandler implements ActionListener,ItemListener{

TestMenu tm;

Mymenuhandler(TestMenu tm) {

this.tm=tm;

public void actionPerformed(ActionEvent ae) {

String msg=" You selected";

String s=ae.getActionCommand();

if(s.equals("New...."))

msg="New";

else if(s.equals("Quit....")) {

TestDialog d=new TestDialog(tm,"Confirm Exit Dialog");

d.setVisible(true);

else if(s.equals("Open....")) {

FileDialog fopen=new FileDialog(tm,"Open a File",FileDialog.LOAD);

fopen.setVisible(true);

msg="You selected "+fopen.getDirectory()+" "+fopen.getFile();

else if(s.equals("Save....")) {

FileDialog fsave=new FileDialog(tm,"Save a File",FileDialog.SAVE);

fsave.setVisible(true);

public void itemStateChanged(ItemEvent ie) {

tm.repaint();

class TestDialog extends Dialog implements ActionListener {

Frame f;

String s;

Button b,b1;

TestDialog(Frame f,String title) {

super(f,title,false);

this.f=f;

this.s=title;

setLayout(new FlowLayout());

setSize(200,400);

add(new Label("Are you sure you want to exit"));

add(b=new Button("Yes"));

add(b1=new Button("No"));

b.addActionListener(this);

public void actionPerformed(ActionEvent e) {

if(e.getSource() == b){

dispose();

else {

dispose();

public class DemoFileDialog extends Applet {

Frame f;

f=new TestMenu("My Menu Frame");

f.setSize(300,500);

f.setVisible(true); }

f.setVisible(true);

87 Program to Demonstrate Labels

import java.awt.*;

/*<applet code=demolabel.class height=200 width=400>

</applet>*/

public class demolabel extends Applet

public void init()

Label nm=new Label("Name");

Label addr=new Label("Address");

//add labels to window

add(nm);

add(addr);

88 Program to Demonstrate Lists

import java.awt.*;

</applet>

public class ListDemo extends Applet implements ActionListener {

List os,browser;

String msg= "";

os=new List(4,true);

browser=new List(4,false);

os.add("windows 98");

os.add("Windows NT");

os.add("Solaris");

os.add("MacOS");

browser.add("Netscape 1.1");

browser.add("Netscape 2.x");

browser.add("Internet Explorer 2.0");

browser.add("Lynx 2.4");

browser.select(1);

add(os);

add(browser);

os.addActionListener(this);

browser.addActionListener(this);

repaint();

int idx[];

msg="Current OS:";

idx=os.getSelectedIndexes();

for(int i=0; i<idx.length; i++)

msg += os.getItem(idx[i]) + " ";

msg="Current Browser: ";

msg += browser.getSelectedItem();

89 Program to Demonstrate Menu

import java.awt.*;

/*<applet code=DemoMenu width=350 height=250>

</applet>*/

class TestMenu extends Frame {

String msg="";

CheckboxMenuItem workoff;

TestMenu(String title) {

super(title);

MenuBar mbar=new MenuBar();

setMenuBar(mbar);

Menu file=new Menu("File");

MenuItem i1,i2,i3,i4,i5;

file.add(i1=new MenuItem("New...."));

file.add(i2=new MenuItem("Open...."));

file.add(i3=new MenuItem("Close...."));

file.add(i4=new MenuItem("-"));

file.add(i5=new MenuItem("Quit...."));

mbar.add(file);

Menu edit=new Menu("Edit");

MenuItem i6,i7,i8,i9;

edit.add(i6=new MenuItem("Cut...."));

edit.add(i7=new MenuItem("Copy...."));

edit.add(i8=new MenuItem("Paste...."));

edit.add(i9=new MenuItem("-"));

Menu submenu1=new Menu("Text Size...");

MenuItem i10,i11;

submenu1.add(i10=new MenuItem("Large...."));

submenu1.add(i11=new MenuItem("Small...."));

edit.add(submenu1);

workoff=new CheckboxMenuItem("Work Offline");

edit.add(workoff);

mbar.add(edit);

Mymenuhandler handler=new Mymenuhandler(this);

workoff.addItemListener(handler);

if(workoff.getState())

g.drawString("Checked",10,200);

g.drawString("Unchecked",10,200);

class Mymenuhandler implements ActionListener,ItemListener {

TestMenu tm;

Mymenuhandler(TestMenu tm) {

this.tm=tm;

String msg=" You selected";

String s=ae.getActionCommand();

if(s.equals("New...."))

msg="New";

else if(s.equals("Quit....")) {

//activate a dialog box

TestDialog d=new TestDialog(tm,"Confirm Exit Dialog");

d.setVisible(true);

public void itemStateChanged(ItemEvent ie) {

tm.repaint();

class TestDialog extends Dialog implements ActionListener {

Frame f;

String s;

Button b,b1;

TestDialog(Frame f,String title){

super(f,title,false);

this.f=f;

this.s=title;

setSize(300,200);

add(new Label("Are you sure you want to exit"));

add(b=new Button("Yes"));

add(b1=new Button("No"));

b.addActionListener(this);

if(e.getSource() == b){

dispose();

else {

dispose();

public class DemoMenu extends Applet {

Frame f;

f=new TestMenu("My Menu Frame");

f.setSize(300,500);

f.setVisible(true);

90 Program to Demonstrate Text Area

import java.awt.*;

public class DemoTextArea extends Applet implements ActionListener {

TextArea remark;

Button b1;

String msg="";

remark=new TextArea("Enter your remarks",5,50);

b1=new Button("Show");

add(remark);

add(b1);

b1.addActionListener(this);}

if(s.equals("Show")) {

msg=remark.getText();

repaint(); }}

g.drawString(msg,130,160); }}

91 Program to Make a Login Window

import java.awt.*;

public class login extends Applet implements ActionListener{

TextField un,pass;

Button b1,b2;

String msg="";

public void init(){

un=new TextField(12);

pass=new TextField(8);

pass.setEchoChar('*');

b1=new Button("Verify");

b2=new Button("Cancel");

add(un);

add(pass);

add(b1);

add(b2);

public void actionPerformed(ActionEvent e){

if(s.equals("Verify")){

String user=un.getText();

String pwd=pass.getText();

if(user.equals("student") && pwd.equals("loyola")){

msg="Login Successful";

msg="You cannot login.Check your username and password";

un.setText("");

pass.setText("");

msg="";

repaint();

}}//end of class

92 Program to Make a Login Focus

import java.awt.*;

/*<applet code=loginFocus.class height=200 width=400>

</applet>*/

public class loginFocus extends Applet implements ActionListener,FocusListener {

TextField un,pass;

Button b1,b2;

String msg="";

un=new TextField(12);

pass=new TextField(8);

pass.setEchoChar('*');

b1=new Button("Verify");

b2=new Button("Cancel");

add(un);

add(pass);

add(b1);

add(b2);

un.addFocusListener(this);

pass.addFocusListener(this);

public void focusGained(FocusEvent fe) {

if(fe.getSource()==un) {

un.setText("Enter UserName");

public void focusLost(FocusEvent fe) {

if(fe.getSource()==pass) {

if(pass.getText().equals("")) {

msg="Enter the password to login";

repaint();

if(s.equals("Verify")){

String user=un.getText();

String pwd=pass.getText();

if(user.equals("student") && pwd.equals("loyala")) {

msg="Login Successful";

msg="You cannot login.Check your username and password";

else {

un.setText("");

pass.setText("");

msg="";

repaint();

}}//end of class

93 Program to Demonstrate Mouse Adapter

public class MouseAdapterApplet extends Applet {

addMouseListener(new MouseAdapter(){

public void mousePressed(MouseEvent e){

showStatus("Mouse Pressed");}});}}

94 Program to Demonstrate Mouse Events

import java.awt.*;

</Applet>

public class MouseEventsApplet extends Applet implements MouseListener,MouseMotionListener {

String msg;

msg="";

addMouseListener(this);

addMouseMotionListener(this);

public void mouseClicked(MouseEvent e){

msg="mouseClicked";

repaint();

public void mouseEntered(MouseEvent e){

msg="mouseentered";

repaint();

public void mouseExited(MouseEvent e){

msg="mouseexit";

repaint();}

msg="mousepressed";

repaint();}

public void mouseReleased(MouseEvent e){

msg="mousereleased";

repaint();}

public void mouseDragged(MouseEvent e){

msg="*";

repaint();

public void mouseMoved(MouseEvent e){

msg="mousemoved";

repaint();

95 Program to Demonstrate the key event handlers

import java.awt.*;

</applet>

public class SimpleKey extends Applet

implements KeyListener {

String msg = "";

int X = 10, Y = 20; // output coordinates

addKeyListener(this);

requestFocus(); // request input focus

public void keyPressed(KeyEvent ke) {

showStatus("Key Down");

public void keyReleased(KeyEvent ke) {

showStatus("Key Up");

public void keyTyped(KeyEvent ke) {

msg += ke.getKeyChar();

repaint();

// Display keystrokes.

g.drawString(msg, X, Y);

96 Program to Demonstrate Border Layout

import java.awt.*;

</applet>

public class TestBL extends Applet {

setLayout(new BorderLayout());

add(new Scrollbar(Scrollbar.HORIZONTAL),BorderLayout.NORTH);

add(new Scrollbar(Scrollbar.HORIZONTAL),BorderLayout.SOUTH);

add(new Scrollbar(Scrollbar.VERTICAL),BorderLayout.EAST);

add(new Scrollbar(Scrollbar.VERTICAL),BorderLayout.WEST);

add (new TextArea("I am in the center"),BorderLayout.CENTER);

97 Program to Demonstrate Card Layout

import java.awt.*;

</applet>

public class TestCL extends Applet implements ActionListener {

Panel p,p1,p2;

CardLayout cl1;

Label l1;

Button b1,b2;

CheckboxGroup cbg;

Checkbox c1,c2;

l1=new Label("Licesence Agreement");

b1=new Button("Accept");

b2=new Button("Exit");

cl1=new CardLayout();

p=new Panel();

p.setLayout(cl1);

p1=new Panel();

p1.add(l1);

p1. add(b1);

p1.add(b2);

p2=new Panel();

cbg=new CheckboxGroup();

c1=new Checkbox("Typical",cbg,true);

c2=new Checkbox("Custom",cbg,false);

p2.add(c1);

p2.add(c2);

p.add(p1,"panel1");

p.add(p2,"panel2");

add(p);

if(e.getSource() == b1) {

cl1.show(p,"panel2");

98 Program to Test Fonts Using Mouse Events

import java.awt.*;

public class TestFonts extends Applet{

int n=0;

Font f;

String msg;

public void init(){

f=new Font("Dialog",Font.PLAIN,12);

msg="Hello World";

setFont(f);

class MyMouseAdapter extends MouseAdapter{

TestFonts tfonts;

public MyMouseAdapter(TestFonts f){

tfonts=f;

tfonts.n++;

switch(tfonts.n){

case 1:

tfonts.f=new Font("DialogInput",Font.BOLD,20);

break;

case 2:

tfonts.f=new Font("SansSerif",Font.BOLD,22);

break;

case 3:

tfonts.f=new Font("Serif",Font.BOLD,24);

break;

case 4:

tfonts.f=new Font("Monospaced",Font.BOLD,26);

break;

if(tfonts.n==4){

tfonts.n=-1;

tfonts.setFont(tfonts.f);

tfonts.repaint();

99 Program to Demonstrate Grid Layouts

import java.awt.*;

</applet>

public class TestGL extends Applet{

public void init(){

setLayout(new FlowLayout(FlowLayout.CENTER));

add(new TextField("0"));

setLayout(new GridLayout(3,3));

setFont(new Font("SansSerif",Font.BOLD,16));

for(int i=0;i<3;i++){

for(int j=0;j<3;j++){

int k=i*3+j;

if(k>0)

add(new Button(""+k));

100 Program to Demonstrate Scrollbar

import java.awt.*;

</applet>

public class TestScrollBar extends Applet implements AdjustmentListener

Scrollbar s1,s2,s3;

public void init()

s1=new Scrollbar(Scrollbar.HORIZONTAL,100,10,0,255);

s2=new Scrollbar(Scrollbar.VERTICAL,50,10,0,255);

s3=new Scrollbar(Scrollbar.VERTICAL,150,10,0,255);

setLayout(new BorderLayout());

add(s1,BorderLayout.SOUTH);

add(s2,BorderLayout.EAST);

add(s3,BorderLayout.WEST);

//register to recieve adjustment events

s1.addAdjustmentListener(this);

public void adjustmentValueChanged(AdjustmentEvent e)

repaint();

int r=s1.getValue();

int g1=s2.getValue();

int b=s3.getValue();

Color c=new Color(r,g1,b);

setBackground(c);

101 Program to Check JDBC Connection

import java.sql.*;

import java.util.*;

public class JDBCDemo1

public static void main(String[]args) throws Exception

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

Connection c = DriverManager.getConnection("jdbc:odbc:MyDSN");

System.out.println("Connection Successfull");

c.close();

OUTPUT :

Connection Successful

102 Program to retrieve Records from Database

import java.sql.*;

public class TestRetrieveRecords {

public static void main(String[] args) throws Exception {

Connection con=DriverManager.getConnection("jdbc:odbc:mdbTEST");

Statement st = con.createStatement();

ResultSet rs = st.executeQuery("select * from emp");

System.out.println("*** Employee's Details *** \n");

while(rs.next()) {

System.out.println("Employee Number: " + rs.getInt(1));

System.out.println("Employee Name: " + rs.getString(2));

System.out.println("Employee Salary: " + rs.getInt(3) + "\n");

rs.close();

st.close();

con.close();

OUTPUT :

*** Employee's Details ***

Employee Number: 1

Employee Name: Uday

Employee Salary: 6000

Employee Number: 2

Employee Name: Venkat

Employee Number: 3

Employee Name: Satish

Employee Number: 4

Employee Name: Vijay

103 Program to demonstrate Insertion into Database

import java.sql.*;

import java.io.*;

public class InsertDemo {

public static void main(String[] args) throws Exception {

int no=9;

String name="Satya";

double sal=10000;

Connection con = DriverManager.getConnection("jdbc:odbc:mdbTEST");

Statement st=con.createStatement();

st.executeUpdate("insert into Emp values("+ no + ",'"+ name +"',"+ sal +")");

System.out.println("*** Record Inserted Successfully ***\n");

st.close();

con.close();

OUTPUT :

*** Record Inserted Successfully ***

104 Program to demonstrate Update into Database

import java.util.*;

import java.sql.*;

import java.io.*;

public class JDBCUpdateDemo {

public static void main(String[]args) throws Exception{

int eno=9;

Connection c = DriverManager.getConnection("jdbc:odbc:mdbTEST");

Statement st=c.createStatement();

int i = st.executeUpdate("update Emp set Salary = Salary +1000 where Empid="+eno);

System.out.println(i+"----record Updated");

st.close();

c.close();

OUTPUT :

1----record Updated

105 Program to demonstrate Prepared Statement

import java.sql.*;

import java.io.*;

public class JDBCPrepareDemo {

public static void main(String[] args)throws Exception {

PreparedStatement pst = con.prepareStatement("insert into Emp(Empid,Name,Salary) values(?,?,?)");

int no=104;

pst.setInt(1,no);

String name="RUVN";

pst.setString(2,name);

int sal=14000;

pst.setInt(3,sal);

int i = pst.executeUpdate();

System.out.println(i+"--Record inserted");

pst.close();

con.close();

OUTPUT :

1--Record inserted

106 Program to Demonstrate Data Entry using Applet

import java.sql.*;

import java.awt.*;

public class JDBCDataEntry extends Frame implements ActionListener

Button ok,cancel;

TextField t1,t2,t3;

JDBCDataEntry()

ok=new Button("OK");

cancel=new Button("Cancel");

t1=new TextField(20);

add(new Label("Employee Number : "));

add(t1);

add(new Label("Employee Name : "));

add(t2);

add(new Label("Employee Salary : "));

add(t3);

add(ok);

add(cancel);

ok.addActionListener(this);

cancel.addActionListener(this);

setTitle("Employee's Registration Form");

setSize(350,300);

setVisible(true);

public void actionPerformed(ActionEvent ae)

if(ae.getSource()==cancel)

t1.setText("");

t2.setText("");

t3.setText("");

if(ae.getSource()==ok)

int no=Integer.parseInt(t1.getText());

String name=t2.getText();

int sal=Integer.parseInt(t3.getText());

st.executeUpdate("insert into Emp values("+ no + ",'" + name + "' , " + sal + ")");

System.out.println("*******Registraiton performed*******");

st.close();

con.close();

catch(Exception e)

System.out.println("Message: " + e);

public static void main(String[] args) throws Exception

new JDBCDataEntry();

*******Registraiton performed*******

107 Program to Demonstrate Result Set Meta Data

import java.sql.*;

public class JDBCRSMetaDataDemo

Connection c = DriverManager.getConnection("jdbc:odbc:mdbTEST","scott","tiger");

String s="select * from emp";

ResultSet rs=st.executeQuery(s);

ResultSetMetaData rsm=rs.getMetaData();

rs.next();

System.out.println("No of columns in the table: "+ rsm.getColumnCount());

System.out.println(rsm.getColumnName(1)+" : "+rsm.getColumnTypeName(1));

rs.close();

st.close();

c.close();

OUTPUT :

No of columns in the table: 3

Empid : INTEGER

Name : VARCHAR

Salary : INTEGER

108 Program to Demonstrate Transaction handling

import java.sql.*;

public class JDBCTransDemo

Properties p=new Properties();

p.setProperty("uid","scott");

p.setProperty("password","tiger");

Connection con = DriverManager.getConnection("jdbc:odbc:MyDSN",p);

//set the auto commit mode to false

con.setAutoCommit(false);

//create a transaction

int i= st.executeUpdate("insert into Emp values("+ no + ",'"+ name +"',"+ sal +")");

System.out.println("first row inserted but not commited");

//create another transaction

int j= st.executeUpdate("insert into Emp values("+ no + ",'"+ name +"',"+ sal +")");

System.out.println("second row inserted but not commited");

//commit the trans

con.commit();

System.out.println("trans commited");

st.close();

con.close();

}catch(Exception e)

System.out.println("Error: "+e);

109 Program to Demonstrate Callable Statement

import java.sql.*;

import java.util.*;

public class JDBCCallableDemo

Connection c = DriverManager.getConnection("jdbc:odbc:MyDSN1");

String str= "{call emp_job(?,?,?)}";

//call a stored procedure

CallableStatement cs=c.prepareCall(str);

//pass the IN parameter

cs.setInt(1,7839);

//register the out parameters

cs.registerOutParameter(2,Types.VARCHAR);

cs.registerOutParameter(3,Types.VARCHAR);

//process the stored procedure

cs.execute();

//retrieve the data

ename=cs.getString(2);

ejob=cs.getString(3);

//display the data

System.out.println("Employee name: "+ename);

System.out.println("Employee Job: "+ejob);

cs.close();

c.close();

110 Program to Demonstrate Result Set Meta Data

import java.sql.*;

import java.util.*;

import java.io.*;

public class Rsmeta1

Properties p=new Properties();

p.setProperty("uid","scott");

p.setProperty("password","tiger");

Connection c = DriverManager.getConnection("jdbc:odbc:student",p);

ResultSet rs=st.executeQuery("select * from student");

ResultSetMetaData rsmd = rs.getMetaData();

for(int i=0; i< rsmd.getColumnCount();i++)

System.out.print(rsmd.getColumnLabel(i+1)+" ");

while(rs.next())

System.out.println(rs.getInt(1)+" "+rs.getString(2)+" "+rs.getInt(3)+" "+rs.getInt(4));

st.close();

c.close();

111 Program to Demonstrate Database Meta Data

import java.sql.*;

public class JDBCDBMetaDataDemo

Connection c = DriverManager.getConnection("jdbc:odbc:MyDSN1","scott","tiger");

//create a DB metadata object

DatabaseMetaData dbm=con.getMetaData();

//String[] tabtypes={"TABLES"};

ResultSet tabrs=dbm.getTables(null,null,null,"TABLE");

while(tabrs.next())

System.out.println(tabrs.getString("TABLE_NAME"));

con.close();

112 Program to Demonstrate Add Interface

import java.util.*;

import java.rmi.*;

public interface RMIAddInterface extends java.rmi.Remote

int add(int a,int b ) throws RemoteException;

113 Program to Demonstrate Add S erver

import java.rmi.*;

import java.rmi.server.UnicastRemoteObject;

public class RMIAddServer

if(System.getSecurityManager() == null)

System.setSecurityManager( new RMISecurityManager() );

RMIAddImpl myObject = new RMIAddImpl( "MYADDSERVER" );

System.out.println( "RMI Server ready..." );

114 Program to add Client

import java.rmi.*;

import java.rmi.registry.*;

public class RMIAddClient

public static void main(String[] args)

if(System.getSecurityManager() == null)

System.setSecurityManager( new RMISecurityManager() );

RMIAddInterface a = (RMIAddInterface)Naming.lookup("rmi://localhost/MYADDSERVER");

System.out.println( "The sum is:"+a.add(2,2));

catch( Exception e )

System.out.println( e );

115 implementation for the interface

import java.rmi.*;

import java.rmi.server.UnicastRemoteObject;

public class RMIAddImpl extends UnicastRemoteObject implements RMIAddInterface

public RMIAddImpl( String name ) throws RemoteException

Naming.rebind( name, this );

catch( Exception e )

System.out.println( e );

public int add( int a,int b )

return (a+b);

116 Create a Policy to Allow Permission for Everyone

grant {

// Allow everything

permission java.security.AllPermission;

java programs

demonstrate

print prime

interface

class program

applet program

demonstrate

demonstrate

cla program

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chapter 2: writing java programs java programming from the...

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