[20160704]Addition program that use JOptionPane for input and output

 //Addition program that use JOptionPane for input and output.

 import javax.swing.JOptionPane;

 public class Addition{
    public static void main(String[] args) {
      String firstNumber=JOptionPane.showInputDialog("Enter first integer!");

      String secondNumber=JOptionPane.showInputDialog("Enter second integer!");

      int num1=Integer.parseInt(firstNumber);
      int num2=Integer.parseInt(secondNumber);

      int sum=num1+num2;

      JOptionPane.showMessageDialog(null,"The sum is:\t"+sum,"sum of two integers",JOptionPane.PLAIN_MESSAGE);

    }
 }