progressbarexample.java

java swing 开发代码

//  ProgressBarExample.java
// A demonstration of the JProgressBar component.  The component tracks the
// progress of a for loop.
//
package	jswing.ch06;

import javax.swing.*;

public class ProgressBarExample extends JPanel {

  JProgressBar pbar;
  static final int MY_MINIMUM=0;
  static final int MY_MAXIMUM=100;

  public ProgressBarExample() {
     pbar = new JProgressBar();
     pbar.setMinimum(MY_MINIMUM);
     pbar.setMaximum(MY_MAXIMUM);
     add(pbar);
  }

  public void updateBar(int newValue) {
    pbar.setValue(newValue);
  }

  public static void main(String args[]) {

     final ProgressBarExample it = new ProgressBarExample();

     JFrame frame = new JFrame("Progress Bar Example");
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   
     frame.setContentPane(it);
     frame.pack();
     frame.setVisible(true);

     for (int i = MY_MINIMUM; i <= MY_MAXIMUM; i++) {
       final int percent=i;
       try {
         SwingUtilities.invokeLater(new Runnable() {
             public void run() {
               it.updateBar(percent);
             }
         });
         java.lang.Thread.sleep(100);
       } catch (InterruptedException e) {;}
     } 
  }
}