choice =Integer.parseInt(JOptionPane.showInputDialog ("What do you want to calculate? \n[1] Water Bill \n[2] Electricity Bill")); switch(choice) { case 1: JOptionPane.showInputDialog( null, "Water consumed:"); { int water_consumed; if (water_consumed >0 &&water_consumed <=100) {water_amt=water_consumed*15;} else if (water_consumed>100 &&water_consumed<=300) {units=water_consumed-100; water_amt=15*100+units*30;} else if (water_consumed>300 && water_consumed<=500) {units=water_consumed-300; water_amt=15*100+30*200+units*45;} else if (water_consumed>500) {units=water_consumed-500; water_amt=15*100+30*200+45*200+units*60;} else {JOptionPane.showMessageDialog(null,"Wrong Unit Consumed Entered","ERROR",JOptionPane.ERROR_MESSAGE);} JOptionPane.showMessageDialog(null,"CONSUMED UNITS~~~>"+water_consumed+"\nAmount of Electricity Bill~~>"+water_amt,"BILL CALCULATOR",JOptionPane.INFORMATION_MESSAGE); break; } default:

JOptionPane.showMessageDialog(null,"Invalid Choice!","ERROR",JOptionPane.ERROR_MESSAGE);

break;}