JProgressBar Demo 线程实时刷新信息
http://www.cnblogs.com/leajon-first/archive/2012/10/26/2740633.html
涉及三个线程：
主线程：主线程运行程序，
任务线程：然后打开一个新线程来处理任务，
刷新线程：在处理任务的时候，需要刷新主线程里面的信息，
那么应该重新开第三个线程来刷新主线程的信息。
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Java代码 import java.awt.BorderLayout; import java.awt.Color; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.logging.Level; import java.util.logging.Logger; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JProgressBar; import javax.swing.SwingUtilities; public class PgbDemo extends JFrame { private JProgressBar pgb; private JButton but; private JPanel pan; public PgbDemo() { super("JProgressBar Demo"); initComponents(); } private void initComponents() { pan = new JPanel(); pan.setLayout(new BorderLayout()); pgb = new JProgressBar(); pgb.setMinimum(0); pgb.setMaximum(100); pgb.setValue(0); pgb.setStringPainted(true); pgb.setBorderPainted(true); pgb.setBackground(Color.yellow); pan.add(pgb, BorderLayout.CENTER); but = new JButton("Start"); but.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { //run task but.setEnabled(false); new ATask().start(); } }); pan.add(but, BorderLayout.EAST); this.getContentPane().add(pan); this.setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { PgbDemo frame = new PgbDemo(); frame.setLocationRelativeTo(null); frame.setSize(500, 100); frame.setVisible(true); } }); } class ATask extends Thread { public void run() { System.out.println(SwingUtilities.isEventDispatchThread()); for (int i = 0; i < 130; i++) { final int percents = (int) ((float) i / 130.0 * 100.0) + 1; SwingUtilities.invokeLater(new Runnable() { public void run() { PgbDemo.this.pgb.setValue(percents); } }); try { Thread.sleep(100); } catch (InterruptedException ex) { Logger.getLogger(PgbDemo.class.getName()).log(Level.SEVERE, null, ex); } } SwingUtilities.invokeLater(new Runnable() { public void run() { PgbDemo.this.but.setEnabled(true); } }); } } } |
多个线程,比如一个线程做业务,一个线程专门处理进度条
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Java代码 package tools; import java.awt.BorderLayout; import java.awt.Color; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.logging.Level; import java.util.logging.Logger; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JProgressBar; import javax.swing.SwingUtilities; /** * 涉及到四个个线程 * 1.主线程 * 2.进度条线程 * 3.做业务的线程 * 4.改变进度条值的线程(不断创建,消失) * @author Administrator * */ public class PgbDemo extends JFrame { /** * */ private static final long serialVersionUID = 1L; private JProgressBar pgb; private JButton but; private JPanel pan; private int max = 100; private int current = 0; public PgbDemo() { super("JProgressBar Demo"); initComponents(); } private void initComponents() { pan = new JPanel(); pan.setLayout(new BorderLayout()); pgb = new JProgressBar(); pgb.setMinimum(0); pgb.setMaximum(100); pgb.setValue(0); pgb.setStringPainted(true); pgb.setBorderPainted(true); pgb.setBackground(Color.yellow); pan.add(pgb, BorderLayout.CENTER); but = new JButton("Start"); but.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { // run task but.setEnabled(false); new ATask().start(); new ATask1().start(); System.out.println("AAAAAAA"); } }); pan.add(but, BorderLayout.EAST); this.getContentPane().add(pan); this.setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { PgbDemo frame = new PgbDemo(); frame.setLocationRelativeTo(null); frame.setSize(500, 100); frame.setVisible(true); } }); } class ATask1 extends Thread { public void run() { System.out.println(SwingUtilities.isEventDispatchThread()); while (current <= max) { System.out.println(current); try { Thread.sleep(30); } catch (InterruptedException ex) { Logger.getLogger(PgbDemo.class.getName()).log(Level.SEVERE, null, ex); } //同步操作 synchronized(this){ current++; } } SwingUtilities.invokeLater(new Runnable() { public void run() { PgbDemo.this.but.setEnabled(true); } }); } } class ATask extends Thread { public void run() { System.out.println(SwingUtilities.isEventDispatchThread()); int currPercents = 0;//用来跳出判断 while(currPercents<=100){ System.out.println("----------------current=>" + current); System.out.println("----------------max=>" + max); final int percents = (int) ((float) current / max * 100.0) + 1; currPercents= percents; System.out.println("----------------percents=>" + percents); SwingUtilities.invokeLater(new Runnable() { //设定进度条的值,是需要在一个线程里面的 public void run() { PgbDemo.this.pgb.setValue(percents); } }); try { Thread.sleep(50); } catch (InterruptedException ex) { Logger.getLogger(PgbDemo.class.getName()).log(Level.SEVERE, null, ex); } } SwingUtilities.invokeLater(new Runnable() { public void run() { PgbDemo.this.but.setEnabled(true); } }); } } } |
