Variables add 2 nos

import javax.swing.*;

class AddNumbers

{

public static void main( String[ ] args )

{

String x;

int a;

x = JOptionPane.showInputDialog("Enter a number:");

a = Integer.parseInt(x);

String y;

int b;

y = JOptionPane.showInputDialog("Enter a number:");

b = Integer.parseInt(y);

int c;

c = a + b;

System.out.println("The sum is " + c);

}

}