Java通过继承thread类与实现Runnable接口实现多线程的区别

Java中线程的创建有两种方式：

1．  通过继承Thread类，重写Thread的run()方法，将线程运行的逻辑放在其中

2．  通过实现Runnable接口，实例化Thread类

一、通过继承Thread类实现多线程

class MyThread extends Thread{
	String name = null;
	int ticket = 0;
	public MyThread(String name){
		this.name = name;
	}
	public synchronized void run(){
		for (int i = 0; i < 5; i++) {
			System.out.println(Thread.currentThread().getName()+this.name+" ticket:"+ticket++);
			try {
				Thread.sleep(100);
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}

	}
}

通过如下方式运行：

     public static void main(String[] args) {

         MyThread mThread1 = new MyThread("线程一");
         MyThread mThread2 = new MyThread("线程二");
         MyThread mThread3 = new MyThread("线程三");
         mThread1.start();
         mThread2.start();
         mThread3.start();
     }    

运行结果如下：

 Thread-1线程二 ticket:0
 Thread-0线程一 ticket:0
 Thread-2线程三 ticket:0
 Thread-1线程二 ticket:1
 Thread-0线程一 ticket:1
 Thread-2线程三 ticket:1
 Thread-1线程二 ticket:2
 Thread-2线程三 ticket:2
 Thread-0线程一 ticket:2
 Thread-1线程二 ticket:3
 Thread-2线程三 ticket:3
 Thread-0线程一 ticket:3
 Thread-1线程二 ticket:4
 Thread-2线程三 ticket:4
 Thread-0线程一 ticket:4

二、通过继承Runnable接口实现多线程

多线程类：

 class RunThread implements Runnable{

     int Counter = 0;
     @Override
     public synchronized void run() {
         for(int i=0;i<5;i++){
             System.out.println(Thread.currentThread().getName()+"count:"+Counter++);
             try {
                 Thread.sleep(100);
             } catch (InterruptedException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
     }
 }

实现方式：

     public static void main(String[] args) {

         RunThread rThread = new RunThread();
         Thread t1 = new Thread(rThread,"线程一");
         Thread t2 = new Thread(rThread,"线程二");
         Thread t3 = new Thread(rThread,"线程三");
         t1.start();
         t2.start();
         t3.start();
 　　}

输出结果：

 线程一count:0
 线程一count:1
 线程一count:2
 线程一count:3
 线程一count:4
 线程二count:5
 线程二count:6
 线程二count:7
 线程二count:8
 线程二count:9
 线程三count:10
 线程三count:11
 线程三count:12
 线程三count:13
 线程三count:14