多线程 编写多线程的两种方式

1、通过继承Thread编写多线程类

package org.zln.thread;

import java.util.Date;

/**
 * Created by coolkid on 2015/6/21 0021.
 */
public class TestThread extends Thread{
    private int time;//休眠时间
    private String user;//调用用户

    public TestThread(int time, String user) {
        this.time = time;
        this.user = user;
    }

    @Override
    public void run() {
        while (true){
            try {
                System.out.println(Thread.currentThread().getName()+"\t"+user+" 休息 "+time+"ms-"+new Date());
                Thread.sleep(time);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args) {
        Thread thread1 = new TestThread(1000,"Jack");
        Thread thread2 = new TestThread(3000,"Mike");
        thread1.start();
        thread2.start();
    }
}

设置线程优先级：thread2.setPriority(Thread.MAX_PRIORITY);

这样就能够保证每次都是thread2先于thread1执行

2、通过实现Runnable接口编写多线程类

package org.zln.thread;

import java.util.Date;

/**
 * Created by coolkid on 2015/6/21 0021.
 */
public class TestRunnable implements Runnable {
    private int time;//休眠时间
    private String user;//调用用户

    public TestRunnable(int time, String user) {
        this.time = time;
        this.user = user;
    }

    @Override
    public void run() {
        while (true){
            try {
                System.out.println(Thread.currentThread().getName()+"\t"+user+" 休息 "+time+"ms-"+new Date());
                Thread.sleep(time);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args) {
        Thread t1 = new Thread(new TestRunnable(1000,"Jack"));
        Thread t2 = new Thread(new TestRunnable(3000,"Mike"));
        t2.setPriority(Thread.MAX_PRIORITY);
        t1.start();
        t2.start();
    }
}