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Simple applet to add 2 integers

// Applet class that does addition of two integer numbers
// import class graphics and javax.swing package

import java.awt.Graphics;
import javax.swing.*;

public class AddApplet extends JApplet
 int sum;
 int x;
 int y;
 public void init()
  String num1;
  String num2;
  // read first number from the keyboard
  num1 = JOptionPane.showInputDialog("Enter a whole number");
  // read seond number from the ketboard
  num2 = JOptionPane.showInputDialog("Enter a whole number");
  x= Integer.parseInt(num1); // comvert the string to an integer
  y= Integer.parseInt(num2); // convert the string to an integer
  sum = x + y;

 public void paint(Graphics g)
  //writes the output in the applet starting at position 30, 30
  g.drawString("the sum ot x (="+x+")+y(="+y+")="+sum, 30,30);

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