Java多线程 开端

Java启动多线程的两种方式：
一是实现Runnable接口
二是继承Thread类，重写run()方法。

package com.kunpengku;

public class Welcome

    public static void main(String[] args) throws Exception
    {
        //多线程方式一
        Runnable r = new Ppp();
        Thread t = new Thread(r);
        t.start();

        //多线程方式二
        Q q = new Q();
        q.start();

    }

}

class Ppp implements Runnable{
    public void run(){
        try{
            for (int i=0;i<10;i++){
                System.out.println(Thread.currentThread()+String.valueOf(i));
                Thread.sleep(1000);
            }
        }catch(InterruptedException e){
            e.printStackTrace();
        }
    }
}

class Q extends Thread{

    public void run(){
        try{
            for (int i=0;i<10;i++){
                System.out.println(Thread.currentThread());
                Thread.sleep(1000);
            }
        }catch(InterruptedException e){
            e.printStackTrace();
        }

    }
}