线程优先级

来源：互联网发布：城市交通综合网络规划编辑：程序博客网时间：2024/05/21 17:34
import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextField; /**  * 线程的优先级  * 10个计数器线程分别被设置了不同的优先级，我们通过计数器的累加来观察优先级的作用  * @author 五斗米  * @blog http://blog.csdn.net/mq612  */public class TestMain extends JFrame {     private MyThread [] thread = null; // 要操作的线程     private JPanel pane = null;     private JButton startButton = null, stopButton = null; // 启动、结束按钮     public TestMain(){         super("线程的优先级");         pane = new JPanel();         thread = new MyThread[10];         for(int i = 0; i < 10; i++){ // 线程的优先级最小是1，最大是10             thread[i] = new MyThread(i + 1);         }         startButton = new JButton("执行");         startButton.addActionListener(new ActionListener(){             public void actionPerformed(ActionEvent e) {                 for(int i = 0; i < 10; i++){                     thread[i].start();                 }             }         });         stopButton = new JButton("结束");         stopButton.addActionListener(new ActionListener(){             public void actionPerformed(ActionEvent e) {                 for(int i = 0; i < 10; i++){                     thread[i].quit();                 }             }         });         JPanel p = new JPanel();         p.add(startButton);         p.add(stopButton);         this.getContentPane().add(pane);         this.getContentPane().add(p, BorderLayout.NORTH);         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);         this.setSize(500, 300);         this.setLocationRelativeTo(null);         this.setVisible(true);     }     /**      * 计数器线程      */    class MyThread extends Thread{         private JTextField text = null; // 计数器         private int i = 0; // 计数器         private int priority = 0; // 优先级         private JLabel label = null; // 优先级显示标签         private boolean b = true; // 控制线程结束的boolean变量         public MyThread(int priority){             this.priority = priority;             this.setPriority(priority);             JPanel p = new JPanel();             label = new JLabel("Priority=" + priority);             text = new JTextField(12);             p.add(label);             p.add(text);             pane.add(p); // 将自己的计数器加入主窗口面板中         }         /**          * 结束线程          */        public void quit(){             b = false;         }         public void run(){             while(b){                 this.text.setText(Integer.toString(i++));                 try {                     this.sleep(1); // 减小这里的毫秒数，可以让我们更容易观察到结果                 } catch (InterruptedException ex) {                     ex.printStackTrace();                 }             }         }     }     public static void main(String [] args){         new TestMain();     }   }
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