demoprogressbar.java

本程序是一个Java环境下的多线程的简单事例

package progress;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.reflect.*;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class DemoProgressBar extends JPanel{

  JProgressBar JPB;
  static final int theMIN=0;
  static final int theMAX=100;

  public DemoProgressBar() {

    super(true);

    JPB=new JProgressBar();
    JPB.setMinimum(theMIN);
    JPB.setMaximum(theMAX);
    add(JPB);

  }//DemoProgressBar

  public void updateBar(int NewValue){
    JPB.setValue(NewValue);
  }//updateBar

  public static void main(String args[]){

    final DemoProgressBar pbe=new DemoProgressBar();

    JFrame jframe=new JFrame("demo");
    jframe.setUndecorated(true);
    jframe.setContentPane(pbe);
    jframe.pack();
    jframe.setVisible(true);

    jframe.addWindowListener(new WindowAdapter(){
      public void windowClosing(WindowEvent e){
        System.exit(0);
      }
    });//addWindowListener

    for(int i=0;i<=100;i++){
      final int theValue=i;
      try{
        SwingUtilities.invokeAndWait(
           new Runnable(){
              public void run(){
                pbe.updateBar(theValue);
              }//run
           }//new Runnable
         );
      }//try
      catch(InterruptedException ie){;}//
      catch(InvocationTargetException ite){}

      try{
        java.lang.Thread.sleep(30);
      }catch(Exception e){;}

    }//for
    jframe.setVisible(false);
  }//main

}//end of class