import java.awt.*;import java.awt.event.*;import javax.swing.*;/* FrameDemo.java requires no other files. */public class FrameDemo {    /**     * Create the GUI and show it.  For thread safety,     * this method should be invoked from the     * event-dispatching thread.     */    private static void createAndShowGUI() {        //Suggest that the L&F (rather than the system)        //decorate all windows.  This must be invoked before        //creating the JFrame.  Native look and feels will        //ignore this hint.        JFrame.setDefaultLookAndFeelDecorated(true);        //Create and set up the window.        JFrame frame = new JFrame("FrameDemo");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        JLabel emptyLabel = new JLabel("");        emptyLabel.setPreferredSize(new Dimension(175, 100));        frame.getContentPane().add(emptyLabel, BorderLayout.CENTER);        //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();            }        });    }}