DuoXiancheng.rar_java多线程

import java.awt.*; import java.awt.event.*; import javax.swing.*; public class DuoXiancheng extends JApplet implements ActionListener { //用applet定义变量和类R private JLabel infor1; private JLabel infor2; private JLabel infor3; private JLabel infor4; private JLabel infor5; private JLabel infor6; private JPanel inforPanel; private JPanel inforPanel2; private JLabel shuchus[]; private JCheckBox annius[]; private Thread xianchengs[]; private boolean zhanting[]; private String colorNames[] = { "Black", "Blue", "Cyan", "Dark Gray", "Gray", "Green", "Light Gray", "Magenta", "Orange", "Pink", "Red", "White", "Yellow","Red","Blue" }; private Color colors[] = { Color.black, Color.blue, Color.cyan, Color.darkGray, Color.gray, Color.green, Color.lightGray, Color.magenta, Color.orange, Color.pink, Color.red, Color.white, Color.yellow,Color.red,Color.blue, }; // 设置GUI 和数组 public void init() { shuchus= new JLabel[15]; annius = new JCheckBox[15]; xianchengs = new Thread[15]; zhanting = new boolean[15]; JLabel infor1=new JLabel(""); JLabel infor2=new JLabel(" 多线程演示程序"); JLabel infor3=new JLabel(" 江南大学"); JLabel infor4=new JLabel(" 信息工程学院"); JLabel infor5=new JLabel(" 软件0202班 刘昌劲"); JLabel infor6=new JLabel(" 6号"); JPanel inforPanel=new JPanel(); inforPanel.setLayout(new GridLayout(1,3)); inforPanel.add(infor1); inforPanel.add(infor2); inforPanel.add(infor3); inforPanel.add(infor4); inforPanel.add(infor5); inforPanel.add(infor6); JPanel inforPanel2=new JPanel(); inforPanel2.setLayout(new GridLayout(5,6,7,7)); Container container = getContentPane(); container.add(inforPanel,BorderLayout.NORTH); container.add(inforPanel2,BorderLayout.CENTER); // 创建GUI元素,注册listeners 并关联到content pane for ( int c = 0; c < 15; c++ ) { annius[c] = new JCheckBox( "线程"+(c+1)+"停止/开始"); annius[c] .addActionListener( this ); annius[c].setBackground(Color.orange); inforPanel2.add(annius[c]); shuchus[c] = new JLabel(); shuchus[c].setOpaque( true ); inforPanel2.add( shuchus[c] ); } } //创建和开始线程方法，该方法在init之后和用户背调用 public void start() { // 创建线程，每次start（）开始时就运行 for (int c=0;c<xianchengs.length; c++) { // 创建线程，用Runnable对象R初始化 xianchengs[c] = new Thread( new R(), "第"+(c+1)+"个线程"); //执行线程 xianchengs[c].start(); } } // 寻找线程在数组中的位置 private int zhiyin( Thread liuxing) { for ( int a=0; a<xianchengs.length;a++) if (liuxing==xianchengs[a] ) return a; return -1; } //当用户选中按钮就调用该方法停止线程 public synchronized void stop() { // 开始令每个线程都运有� for ( int b=0; b<xianchengs.length; b++ ) xianchengs[b] = null; // 等待的线程执行 notifyAll(); } //按钮事件处理 public synchronized void actionPerformed( ActionEvent event ) { for ( int d=0; d<annius.length;d++ ) { if ( event.getSource() == annius[d] ) { zhanting[d] = !zhanting[d]; // 使线程重新运行 if ( !zhanting[d] ) notifyAll(); return; } } } //inner class R private class R implements Runnable { public void run() { // 取得当前运行的线程 final Thread currentThread = Thread.currentThread(); // 确定线程位置 final int zhi= zhiyin( currentThread ); while ( xianchengs[zhi] == currentThread ) { // 0 to 0.25 秒时间阻塞 try { Thread.sleep( ( int ) ( Math.random() * 250 ) ); // 判断线程时否该停止 synchronized( DuoXiancheng.this ) { while ( zhanting[zhi] && xianchengs[zhi] == currentThread ) { //暂停运行线程 DuoXiancheng.this.wait(); } } } //当有异常时InterruptedExceptions处理 catch ( InterruptedException interruptedException ) { System.err.println( "sleep interrupted" ); } // display color on corresponding label SwingUtilities.invokeLater( new Runnable() { //刷新Swing GUI元素 public void run() { // 得随机颜色 int t=( int ) ( Math.random() *15 ) ; Color xianshi=colors[t]; shuchus[zhi].setBackground(xianshi); shuchus[zhi].setText( currentThread.getName() + ": " + colorNames[t]); } } // 结束 anonymous inner class ); // 结束调用SwingUtilities.invokeLater } // while结束 } } //inner class R 结束 } //类结束