HOW TO CREATE A BUTTON

This is the simplest program to understand how to apply button to the applet.
Save the program by button_click.java 
To compile the program in ubuntu type: javac button_click.java
To run the program type java button_click

 import java.applet.*;
import java.awt.event.*;
import java.awt.*;
public class button_click extends Applet implements ActionListener
{
int state;
Checkbox xp,linux,obj;
Button ok;
TextField disp;
public void init()
{
 xp=new Checkbox("  Windows XP");
 linux=new Checkbox(" Linux");
ok=new Button("   OK   ");
disp=new TextField(25);
add(xp);
add(linux);
add(ok);
add(disp);

 ok.addActionListener(this);

 }
public void actionPerformed(ActionEvent ae)
{
if(ae.getSource()==ok)
 {
if(xp.getState()==true)
  disp.setText(xp.getLabel());
else
  if(linux.getState()==true)
  disp.setText(linux.getLabel());
}
}
}
/*<applet code=button_click.class width=225 height=200>
</applet>  */

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