Swing and threads - An Introduction to Graphical User Interfaces with Java Swing - page 242

Running in thread Thread-1
WorkerThread1: Done

The code for NonBlockingFrame is listed below and the resulting display is shown
in Figure 20.1.

File: its/Blocking/NonBlockingFrame.java

1. package its.Blocking;
2.
3. import its.SimpleFrame.SimpleFrame;
4. import java.awt.event.ActionEvent;
5. import java.awt.event.ActionListener;
6. import javax.swing.JLabel;
7. import javax.swing.JMenu;
8. import javax.swing.JMenuBar;
9. import javax.swing.JMenuItem;
10.
11. public class NonBlockingFrame extends SimpleFrame
12. {
13.
14.

private JLabel display;

15. private int nummer;

16.
17.

public NonBlockingFrame(){

18.

nummer = 0;

19.

this .setTitle("Non blocking frame");

20.

display = new JLabel("Nothing happened");

21.

this .getContentPane().add(display);

22.
23.

JMenuBar menuBar = new JMenuBar();

24.

this .setJMenuBar(menuBar);

25.

JMenu menu = new JMenu("Menu1");

26.

menuBar.add(menu);

27.

JMenuItem startItem = new JMenuItem("Start");

28.

menu.add(startItem);

29.

MenuListener mListener = new MenuListener();

30.

startItem.addActionListener(mListener);

31.

}

32.
33. private void lengthyWork(){

34. // This is the lengthy work

35. for ( int i=0;i<10; i++){

36. System.out.println("Working "+i);

37. System.out.println("Running in thread "+

Thread.currentThread().getName());