初识进度条JProgressBar

ProgressBarTest类：
　　实现接口：ActionListener,PropertiesChangeListener
　　覆盖方法：actionPerformed(),propertyChange()
Task类：
　　继承SwingWorker<Void,Void>
　　覆盖方法doInBackground()
Important Code:
　　66~86
View Code
  1 package com.slh.swing;
  2 
  3 import java.awt.*;
  4 import java.awt.event.ActionEvent;
  5 import java.awt.event.ActionListener;
  6 import java.beans.PropertyChangeEvent;
  7 import java.beans.PropertyChangeListener;
  8 import java.util.concurrent.TimeUnit;
  9 
 10 import javax.swing.*;
 11 
 12 public class ProgressBarTest extends JPanel implements ActionListener,
 13     PropertyChangeListener {
 14   private JButton startButton;
 15   private JProgressBar progressBar;
 16   private JTextArea taskOutput;
 17   private Task task;
 18 
 19   class Task extends SwingWorker<Void, Void> {
 20 
 21     @Override
 22     protected Void doInBackground() throws Exception {
 23       int progress=0;
 24       while(progress<100){
 25         Thread.sleep(1000);
 26         progress+=10;
 27         setProgress(Math.min(progress,100));
 28       }
 29       return null;
 30     }
 31     protected void done(){
 32       startButton.setEnabled(true);
 33       setCursor(null);
 34       taskOutput.append("Done!\n");
 35     }
 36 
 37   }
 38 
 39   public ProgressBarTest() {
 40     super(new BorderLayout());
 41     initComponent();
 42   }
 43 
 44   private void initComponent() {
 45     startButton = new JButton("start");
 46     //startButton.setActionCommand("start");//
 47     startButton.addActionListener(this);
 48     
 49     progressBar=new JProgressBar();
 50     progressBar.setValue(0);
 51     progressBar.setStringPainted(true);//
 52     
 53     taskOutput=new JTextArea(5,20);
 54     taskOutput.setMargin(new Insets(5,5,5,5));
 55     taskOutput.setEditable(false);
 56     
 57     JPanel jPanel=new JPanel();
 58     jPanel.add(startButton);
 59     jPanel.add(progressBar);
 60     
 61     add(jPanel,BorderLayout.PAGE_START);
 62     add(new JScrollPane(taskOutput),BorderLayout.CENTER);
 63     setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
 64   }
 65 
 66   @Override
 67   public void propertyChange(PropertyChangeEvent evt) {
 68     // TODO Auto-generated method stub
 69     if("progress"==evt.getPropertyName()){
 70       int progress=(Integer) evt.getNewValue();
 71       progressBar.setValue(progress);
 72       taskOutput.append("当前进度"+progress+"%\n");
 73     }
 74 
 75   }
 76 
 77   @Override
 78   public void actionPerformed(ActionEvent e) {
 79     startButton.setEnabled(false);
 80     setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
 81     task=new Task();
 82     task.addPropertyChangeListener(this);
 83     task.execute();
 84   }
 85 
 86   private static void createAndShowGUI() {
 87     JFrame jFrame = new JFrame();
 88     jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 89 
 90     JComponent pbt = new ProgressBarTest();
 91     pbt.setOpaque(true);
 92     jFrame.setContentPane(pbt);
 93 
 94     jFrame.pack();
 95     jFrame.setVisible(true);
 96   }
 97 
 98   public static void main(String[] args) {
 99     SwingUtilities.invokeLater(new Runnable() {
100       public void run() {
101         createAndShowGUI();
102       }
103     });
104   }
105 
106 }
初识 进度条JProgressBar

初识进度条JProgressBar
