NullLayoutPane.java Source code

Introduction

Here is the source code for NullLayoutPane.java

Source

/*
 * Copyright (c) 2000 David Flanagan. All rights reserved. This code is from the
 * book Java Examples in a Nutshell, 2nd Edition. It is provided AS-IS, WITHOUT
 * ANY WARRANTY either expressed or implied. You may study, use, and modify it
 * for any non-commercial purpose. You may distribute it non-commercially as
 * long as you retain this notice. For a commercial use license, or to purchase
 * the book (recommended), visit http://www.davidflanagan.com/javaexamples2.
 */

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class NullLayoutPane extends JPanel {
    public NullLayoutPane() {
        // Get rid of the default layout manager.
        // We'll arrange the components ourselves.
        this.setLayout(null);

        // Create some buttons and set their sizes and positions explicitly
        for (int i = 1; i <= 9; i++) {
            JButton b = new JButton("Button #" + i);
            b.setBounds(i * 30, i * 20, 125, 30); // use reshape() in Java 1.0
            this.add(b);
        }
    }

    // Specify how big the panel should be.
    public Dimension getPreferredSize() {
        return new Dimension(425, 250);
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });

        frame.getContentPane().add(new NullLayoutPane(), BorderLayout.CENTER);
        // Finally, set the size of the main window, and pop it up.
        frame.setSize(600, 400);
        frame.setVisible(true);
    }

}