Find maximum of two numbers without using third variable in JAVA in JAVA

CODING:

import javax.swing.JOptionPane;

class max

{

public static void main(String[] args)

{

String a=JOptionPane.showInputDialog(null, "A", "Find Maximum Number", JOptionPane.PLAIN_MESSAGE);

String b=JOptionPane.showInputDialog(null, "B", "Find Maximum Number", JOptionPane.PLAIN_MESSAGE);

if(Integer.parseInt(a) > Integer.parseInt(b))

 {

  JOptionPane.showMessageDialog(null,"Max Number is : " + Integer.parseInt(a));

 }

else

 {

  JOptionPane.showMessageDialog(null,"Max Number is : " + Integer.parseInt(b));

 }

System.exit(0);

}

}