/* * A 1.4 application that uses SpringLayout to create a single row * of components, similar to that produced by a horizontal BoxLayout. * Other files required: SpringUtilities.java. */import javax.swing.*;import java.awt.*;public class SpringBox {    /**     * 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("SpringBox");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Set up the content pane.        Container contentPane = frame.getContentPane();        contentPane.setLayout(new SpringLayout());        //Add the buttons.        contentPane.add(new JButton("Button 1"));        contentPane.add(new JButton("Button 2"));        contentPane.add(new JButton("Button 3"));        contentPane.add(new JButton("Long-Named Button 4"));        contentPane.add(new JButton("5"));        //Lay out the buttons in one row and as many columns        //as necessary, with 6 pixels of padding all around.        SpringUtilities.makeCompactGrid(contentPane, 1,                                        contentPane.getComponentCount(),                                        6, 6, 6, 6);        //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();            }        });    }}