多线程简单实例（0）

创建线程有两种方式：1.继承Thread类 2,实现Runnable接口

优缺点：

如果继承Thread，由于java不能多继承，所以无法继承别的类。当然有点就是有很多继承自Thread的方法，方便使用

实现Runnable接口很方便，而且可以继承别的类。缺点就是功能单一。

下面是一个简单的多线程实例。两种方式创建线程类。但是，这个程序的重点不在这，而是线程执行的顺序和过程。

package test;

public class ThreadTest {
    public static void main(String[] args) {
        ThreadDemo thread  = new ThreadDemo();
        RunnableTest test = new RunnableTest();
        Thread test2 = new Thread(test);
        //thread.run();
        thread.start();
        test.run();
        test2.start();
        while(true) {
            System.out.println("all Thread is die");
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            if(!thread.isAlive() && !test2.isAlive())
                break;
        }
        
    }
}

class ThreadDemo extends Thread {
    @Override
    public void run() {
        System.out.println("Thread:"+Thread.currentThread().getName());
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

class RunnableTest implements Runnable{

    @Override
    public void run() {
        System.out.println("this is the test class:"+Thread.currentThread().getName());
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    
}

执行结果：

Thread:Thread-0
this is the test class:main
all Thread is die
this is the test class:Thread-1
all Thread is die
all Thread is die
all Thread is die
all Thread is die
all Thread is die
all Thread is die
all Thread is die
all Thread is die
all Thread is die