// My first JDialog class
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class myDialog1 extends JDialog
{
	public myDialog1 ()
	{	
		Container cont = getContentPane();
		setTitle(" Hello ");
		setLayout(null);
		setSize(200,200);
		cont.setBackground(Color.BLACK);
	}
}

// My second JDialog class
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class myDialog2 extends myDialog1
{
	public myDialog2 ()
	{	
            super();
            getContentPane().setBackground(Color.WHITE);
	}
}

// How do I change the background color in myDialog2 ?