import java.applet.*;
import java.awt.*;
import java.awt.event.*;

public class leak2 extends Applet  {

public void init() 
{
	setBackground(new Color(225,225, 255));
	try
	{
		FrameForApplet frameForApplet = new FrameForApplet("A frame");
	}
	catch (Throwable e)
	{
		System.out.println("Can't use Frame: " + e);
		return;
	}
}

public void paint(Graphics g)
{
	g.drawString("A Frame appears using Java version " + System.getProperty("java.version"), 10 , 25);
}
}  // END OF Class leak2


final class FrameForApplet extends Frame  {

ButtonPanel buttonPanel;
int panelNow;
static final int RED = 0;
static final int GREEN = 1;

FrameForApplet(String s)
{
	super(s);
	setLayout(new GridBagLayout());
	addNotify();
	setBounds(400, 100, 400, 400);
	changeToPage(GREEN);
	show();
}
	
final void changeToPage(int newPanel)
{
	if (buttonPanel != null)
	{
		buttonPanel = null;
		removeAll();
	}
	Runtime.getRuntime().gc();
	System.out.println("total = " + Runtime.getRuntime().totalMemory() + "\t free + " + Runtime.getRuntime().freeMemory());
	if (newPanel == GREEN)
	{
		buttonPanel = new ButtonPanel(GREEN, this);
		add(buttonPanel);
	}
	else if (newPanel == RED)
	{
		buttonPanel = new ButtonPanel(RED, this);
		add(buttonPanel);
	}
	panelNow = newPanel;
	validate();
}
}  // END OF Class FrameForApplet


class ButtonPanel extends Panel implements ActionListener {

static int buttons = 100;
int now;
Button[] button;
FrameForApplet container;
	
ButtonPanel(int now, FrameForApplet container)
{
	this.container = container;
	this.now = now;
	Color buttonColor = (now == 1)? Color.green : Color.red;
	setLayout(new GridLayout(buttons/10, 10, 4, 4));
	button = new Button[buttons];
	for (int i=0; i<buttons; i++)
	{
		button[i] = new Button();
		button[i].setBackground(buttonColor);
		button[i].addActionListener(this);
		add(button[i]);
	}
}

public void actionPerformed(ActionEvent ae)
{
	container.changeToPage(1-now);
}
}  //  END OF Class ButtonPanel