Tutorial Addendum on Beat - Beat JFrame

Interrupting Anatomy Threads

    

Problem: I wish to understand how some accoutrement are created for the anatomy window

    

and can those accoutrement been interrupted.

    

Solution: This is easy. Just get the account of all accoutrement of the current

    

thread group, and arrest them one by one. Actuality is a sample program to show

    

you how to do this:

    

 

    
/**

    
 * FrameThreads.java

    
 * Absorb (c) 2002 by Dr.  Yang

    
 */

    
import java.awt.*;

    
import javax.swing.*;

    
public chic FrameThreads {

    
   accessible changeless abandoned main(String[] a) {

    
      JFrame f =   new   JFrame("Frame 1");

    
      f.setBounds(0,0,100,100);

    
      f.setVisible(true);

    
      f =  new  JFrame("Frame 2");

    
      f.setBounds(50,50,100,100);

    
      f.setVisible(true);

    
      f =  new  JFrame("Frame 3");

    
      f.setBounds(100,100,100,100);

    
      f.setVisible(true);

    
      Thread[] l =  new  Thread[100];

    
      int n = Thread.enumerate(l);

    
      Cilia g = null;

    
      for (int i=0; i<n; i++) {

    
         System.out.println("Active cilia = "+l[i].getName());

    
      }

    
      Cilia t = Thread.currentThread();

    
      for (int i=0; i<n; i++) {

    
         try {

    
            Thread.sleep(1000*30);

    
         } bolt (Exception e) {

    
            System.out.println("Interrupted.");

    
         }

    
         if (t != l[i]) {

    
            System.out.println("Interrupting cilia = "

    
               +l[i].getName());

    
            l[i].interrupt();

    
         }

    
      }

    
   }

    
}

    

If you run this program , you will see 3 anatomy windows assuming up on the screen.

    

After about every 30 seconds, my program will forward an arrest arresting to each

    

thread. If the arrest arresting alcove "Java2D Disposer" thread, all the

    

windows will be closed. The afterward account shows you the achievement of my program:

    

 

    
Active cilia = main

    
Active cilia = AWT-Windows

    
Active cilia = AWT-Shutdown

    
Active cilia = AWT-EventQueue-0

    
Active cilia = Java2D Disposer

    
Interrupting cilia = AWT-Windows

    
Interrupting cilia = AWT-Shutdown

    
Interrupting cilia = AWT-EventQueue-0

    
Interrupting cilia = Java2D Disposer

    
Exception while removing reference: java.lang.InterruptedException

    
java.lang.InterruptedException

    
   at java.lang.Object.wait(Native Method)

    
   at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:111)

    
   at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:127)

    
   at sun.java2d.Disposer.run(Disposer.java:100)

    
   at java.lang.Thread.run(Thread.java:534)

    
AWT acquaintance activation interrupted:

    
java.lang.InterruptedException

    
   at java.lang.Object.wait(Native Method)

    
   at java.lang.Object.wait(Object.java:429)

    
   at sun.awt.AWTAutoShutdown.activateBlockerThread(AWTAutoShut...

    
   at sun.awt.AWTAutoShutdown.setToolkitBusy(AWTAutoShutdown.ja...

    
   at sun.awt.AWTAutoShutdown.notifyToolkitThreadBusy(AWTAutoSh...

    
   at sun.awt.windows.WToolkit.eventLoop(Native Method)

    
   at sun.awt.windows.WToolkit.run(WToolkit.java:262)

    
   at java.lang.Thread.run(Thread.java:534)

    

Note 1: Beat arrangement uses 4 threads: AWT-Windows, AWT-Shutdown, AWT-EventQueue-0,

    

and Java2D Disposer.

    

Note 2: If cilia "Java2D Disposer" is interrupted, the absolute appliance terminates.

    

Displaying Chinese Characters in Anatomy Title

    

Problem: I wish to affectation Chinese characters in the appellation of a anatomy

    

window.

    

Solution: You can alone do this if you are using JDK 1.4.2 and accept a

    

Unicode chantry installed to abutment Chinese characters. In my sample cipher listed

    

below, I am using chantry SimSun, which was installed as allotment of Windows

    

multi-language support.

    

 

    
/**

    
 * JFrameChinese.java

    
 * Absorb (c) 2004 by Dr.  Yang

    
 */

    
import java.awt.*;

    
import javax.swing.*;

    
public chic JFrameChinese {

    
   accessible changeless abandoned main(String[] a) {

    
      JFrame f =  new  JFrame();

    
      f.setFont(new Font("SimSun",Font.PLAIN, 12));

    
      f.setTitle("Hello world! - u7535u8111u4F60u597DuFF01");

    
      f.setBounds(100,50,500,300);

    
      f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    
      f.setVisible(true);

    
   }

    
}

    

Note 1: With JDK 1.4.1 or lower, the characters are displayed as "?".

    

I don t any way to fix it. If you accept any suggestions, amuse allotment them

    

with me.

    

Note 2: To analysis if you accept SimSun chantry installed or not, you can attending

    

for winntfontssimsun.ttc book in your arrangement agenda tree.