Swing - Problem in LookAndFeel

[Niyas Ahmed Sheikh]

The below is not compiling. I copied this prgoram from Sun's tutorial.
The Error due to this line: JFrame.setDefaultLookAndFeelDecorated(true);

import javax.swing.*;        
 
public class HelloWorldSwing {
    /**
     * 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("HelloWorldSwing");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        //Add the ubiquitous "Hello World" label.
        JLabel label = new JLabel("Hello World");
        frame.getContentPane().add(label);
 
        //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();
                                              }
                                            });
    }
}

Error Message:

HelloWorldSwing.java:11: cannot resolve symbol
symbol  : method setDefaultLookAndFeelDecorated  (boolean)
location: class javax.swing.JFrame
        JFrame.setDefaultLookAndFeelDecorated(true);
              ^
1 error

1. What is event-dispatching thread.

2. If we want to use thread, we have extend Thread or implement Runnable. But in this program nothing is used. Why?

3. What is the meaning of the below coding:
javax.swing.SwingUtilities.invokeLater(new Runnable()

4. I heard that swing is platform independent. That is it's look and feel will be same across all the platform. Is it true? If so, I am getting the maximize amd minimize button(Windows Look and Feel) is differ from the one I seen in the Sun's tutorial output(Java Look and Feel). Why?

[ September 09, 2005: Message edited by: Niyas Ahmed Sheikh ]
[ September 09, 2005: Message edited by: Niyas Ahmed Sheikh ]

[Khan Malamir]

About the compile problem - this method is since JDK 1.4, do you use an older version?

1 and 3 are better answered by Sun in Threads and Swing

I don't understand your question (2), you have a Runnable implementation that is queued on the vent thread.

4 is probably because default LAF differs on different platforms.

[Carty Ellis]

This works fine for me

public static void main(String[] args) {
/*
* The following "try" sets the look and feel of the system the
* application is running on
*/
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (NoClassDefFoundError e) {
System.out.println("UIManager error:" + e.getMessage());
} catch (Exception e) {
System.out.println("MESSAGE:" + e.getMessage());
}

RunConversionLoad gui = new RunConversionLoad();
gui.go();
}