JAVA多线程Thread和Runnable的实现

java中只允许单一继承，但允许实现多个接口，因此第二种方法更灵活。

/**
     * 运行继承java.lang.thread类定义的线程
     */
    public void startone() {
        // 创建实例
        onethread onethread = new onethread();
        // 启动线程threada
        onethread.startthreada();
        try {
            // 设置线程休眠1秒
            thread.sleep(1000);
        } catch (interruptedexception e) {
            e.printstacktrace();
        }
        // 停止线程，此处为什么不用stop()方法，因为该方法已经废弃，但可以用在死锁。
        onethread.stopthreada();
    }

/**
     * 运行实现runnable接口定义的线程
     */
    public void starttwo() {
        // 创建实例
        runnable runnable = new twothread();
        // 将实例放入到线程中
        thread threadb = new thread(runnable);
        // 启动线程
        threadb.start();
    }

// 继承thread类定义线程
class onethread extends thread {
    private boolean running = false;

    public void start() {
        this.running = true;
        super.start();
    }
    public void run() {
        int i = 0;
        try {
            while (running) {
                system.out.println("继承thread类定义线程程序体......" + i++);
                thread.sleep(200);
            }
        } catch (interruptedexception e) {
            e.printstacktrace();
        }
    }
    public void startthreada() {
        system.out.println("启动继承thread类定义线程");
        this.start();
    }
    public void stopthreada() {
        system.out.println("关闭继承thread类定义线程");
        this.running = false;
    }
}

// 实现runnable接口定义线程
class twothread implements runnable {
    private date rundate;

    public void run() {
        system.out.println("实现runnable接口定义线程程序体......");
        this.rundate = new date();
        system.out.println("线程启动时间......" + rundate);
    }

public static void main(string[] args) {
        // 实例化对象
        threadstartandstop threadstartandstop = new threadstartandstop();
        threadstartandstop.startone();
        threadstartandstop.starttwo();
    }

 启动继承thread类定义线程
继承thread类定义线程程序体......0
继承thread类定义线程程序体......1
继承thread类定义线程程序体......2
继承thread类定义线程程序体......3
继承thread类定义线程程序体......4
关闭继承thread类定义线程
实现runnable接口定义线程程序体......
线程启动时间......fri mar 15 12:56:57 cst 2013