java多线程测试

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class Counter1a extends Applet  implements Runnable{
    private int count = 0;
    private Button onOff = new Button("Toggle");
    private Button start = new Button("Start");
    private TextField t =  new TextField(10);
    private boolean runFlag = true;
    private long i = 0;
    Thread athread;//define a thread
    public void init()
    {
        start.addActionListener(new StartL());
        add(start);
        onOff.addActionListener(new OnOffL());
        add(onOff);
    }
    public void run()
    {
        System.out.println("已经调用run()方法");
        while(true)
        {
            try {
                athread.sleep(3000);
            }catch(InterruptedException e) { }
            if(runFlag) {
                count++;
                System.out.println("count = " + count);
            }
        }
    }
    class StartL implements ActionListener {
        public void actionPerformed(ActionEvent e)
        {
            Counter1a aCounter1a = new Counter1a();
            athread = new Thread(aCounter1a);//process create
            athread.start();
            System.out.println("已经按下start按钮");
        }
    }
    class OnOffL implements ActionListener
    {
        public void actionPerformed(ActionEvent e)
        {
            System.out.println("已经按下onOff按钮");
        }
    } 
    public static void main(String[] args)
    {
        Counter1a applet = new Counter1a();
        Frame aFrame = new Frame("Counter1a");
        aFrame.addWindowListener(new WindowAdapter(){
        public void windowClosing(WindowEvent e) {
            System.exit(0);
        }
    });
    aFrame.add(applet,BorderLayout.CENTER);
    aFrame.setSize(300,200);
    applet.init();
    applet.start();
    aFrame.setVisible(true);
    }
}

Thread类 java的线程是通过java.lang.Thread类来实现的。Thread类中综合java程序中一个线程需要拥有的属性和方法。当我们生成一个Thread类的对象之后，一个新的线程就产生了