Swing

Introduction

Let's repeat our AWT example written for Swing.

File: "swing1.java"

import java.awt.*;

import java.awt.event.*;

import javax.swing.* ;

public class swing1 extends JFrame implements ActionListener

{

swing1()

{

JButton buttonObj = new JButton("Click me");

buttonObj.setBounds(30,100,100,30);// setting button position

add(buttonObj);//adding button into frame

buttonObj.addActionListener( this ) ;

setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

setSize(300,300);//frame size 300 width and 300 height

setLayout(null);//no layout manager

setVisible(true);//now frame will be visible, by default not visible

}

public void actionPerformed(ActionEvent event)

{

//code that reacts to the action...

System.out.println( "Button clicked." ) ;

}

public static void main(String args[])

{

swing1 frameObj =new swing1();

}

}

Output:

If we look at the code carefully we see that it is very similar to the AWT example. In fact the "ActionListener" is from the same package .