Question 4

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/*
<applet code="AppletButtonActionEventH2E" width=300 height=300></applet>
*/
public class AppletButtonActionEventH2E extends Applet implements ActionListener
{    
    Button ok,cancel,help;
    TextField t;
	String msg = "";
    public void init()
    {         
    	ok = new Button("OK");
    	cancel = new Button("CANCEL");
		help = new Button("HELP");
	 	t = new TextField();	
		add(ok);
		add(cancel);
		add(help);
 add(t);
		ok.addActionListener(this);
		cancel.addActionListener(this);	
		help.addActionListener(this);
	}
    public void actionPerformed(ActionEvent ae)
    {
		String str = ae.getActionCommand();
		if(str.equals("OK"))
		{
			msg = "OK is pressed";
   t.setBackground(Color.RED);
		}
		else if(str.equals("CANCEL"))
		{
			msg = "CANCEL is pressed";
t.setBackground(Color.GREEN);
		}
		else
		{
			msg = "HELP is pressed";
		}
		repaint();              
    }
    public void paint(Graphics g)
    { 
    	showStatus(msg);   
t.setBackground(Color.YELLOW);    
    }
}
            

import java.awt.*;
import java.applet.*;
/*
<applet code="AppletLifeCycle" width=300 height=300>
</applet>
*/
public class AppletLifeCycle extends Applet
{	
	String msg1,msg2,msg3,msg4;
	// called first
	public void init()
	{
		// Initialization
		msg1="init section begins";
	}
	// called second
	public void start()
	{
		// start or resume execution
		 msg2="start section";
	}
	// called when applet stopped
	public void stop()
	{
		// suspends execution
		 msg3="stop section";
	}
	// called when applet 
	public void destroy()
	{
		// execute shutdown activities
		msg4="destroy section";
	}
	public void paint(Graphics g)
	{
		// redisplay content of window
		g.drawString("Demo for basic methods of applet",20,40);
           		g.drawString(msg1,20,80);
         	 	g.drawString(msg2,20,90);
        	  	g.drawString(msg3,20,100);
          	  	g.drawString(msg4,20,120);
	}
}