/* * BorderLayoutDemo.java is a 1.4 application that requires no other files. */import java.awt.BorderLayout;import java.awt.Container;import java.awt.Dimension;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;public class BorderLayoutDemo {    public static boolean RIGHT_TO_LEFT = false;    public static void addComponentsToPane(Container pane) {        if (!(pane.getLayout() instanceof BorderLayout)) {            pane.add(new JLabel("Container doesn't use BorderLayout!"));            return;        }        if (RIGHT_TO_LEFT) {            pane.setComponentOrientation(                java.awt.ComponentOrientation.RIGHT_TO_LEFT);        }        JButton button = new JButton("Button 1 (PAGE_START)");        pane.add(button, BorderLayout.PAGE_START);        //Make the center component big, since that's the        //typical usage of BorderLayout.        button = new JButton("Button 2 (CENTER)");        button.setPreferredSize(new Dimension(200, 100));        pane.add(button, BorderLayout.CENTER);        button = new JButton("Button 3 (LINE_START)");        pane.add(button, BorderLayout.LINE_START);        button = new JButton("Long-Named Button 4 (PAGE_END)");        pane.add(button, BorderLayout.PAGE_END);        button = new JButton("5 (LINE_END)");        pane.add(button, BorderLayout.LINE_END);    }    /**     * Create the GUI and show it.  For thread safety,     * this method should be invoked from the     * event-dispatching thread.     */    private static void createAndShowGUI() {        //Make sure we have nice window decorations.        JFrame.setDefaultLookAndFeelDecorated(true);        //Create and set up the window.        JFrame frame = new JFrame("BorderLayoutDemo");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Set up the content pane.        addComponentsToPane(frame.getContentPane());        //Use the content pane's default BorderLayout. No need for        //setLayout(new BorderLayout());        //Display the window.        frame.pack();        frame.setVisible(true);    }    public static void main(String[] args) {        //Schedule a job for the event-dispatching thread:        //creating and showing this application's GUI.        javax.swing.SwingUtilities.invokeLater(new Runnable() {            public void run() {                createAndShowGUI();            }        });    }}