ButtonExample

import java.awt.*;

import java.awt.event.*;

class ButtonExample extends WindowAdapter implements ActionLiatener{

  Frame f;

  Button b;

  TextField tf;

  int tag=0;

 

  public static void main(String args[]){

    ButtonExample be=new ButtonExample();

    be.go();

  }

 

  public void go(){

    f=new Frame("Button Example");

    b=new Button("Sample");

    b.addActionListener(this);

    b.add(tf,"Center");

 

    f.addWindowListener(this);

    f.setSize(300,500);

    f.setVisible(true);

  }

 

  public void actionPerformed(ActionEvent e){

    String s1="You have pressed the Button!";

    String s2="You do another time!";

 

    if(tag==0){

      tf.setText(s1);

      tag=1;

    }else{

      tf.setText(s2);

      tag=0;

    }

  }

 

  public void actionPerformed(WindowEvent e){

    System.ext(0);

  }

}