Java基础很重要(四)---多线程

Java有两种实现多线程的方式，这个大家应该都记得，继承Thread  or 实现Runnable接口，不过具体的实现忘的差不多了，复习一下。

1、继承Thread类

import java.util.*;class TimePrinter extends Thread{ int pauseTime;//休息时间 String name;//线程名称 public TimePrinter(int x,String n){ pauseTime=x; name=n; } public void run(){ while(true){ try{ System.out.println(name+":"+new Date(System.currentTimeMillis())); Thread.sleep(pauseTime);//线程睡眠 }catch(Exception e); } } }public statci void main(String args[]){ TimePrinter t1=new TimePrinter(1000,"Fast Thread"); t1.start(); TimePrinter t2=new timePrinter(3000,"Slow Thread"); t2.start();}

2、实现Runnable接口

/*下面是一个Applet时钟的例子*/import java.applet.Applet;public class Clock extends Appletimplements Runnable { Thread clockThread; public void start() { if (clockThread == null) { clockThread = new Thread(this, "Clock"); clockThread.start(); }}public void run() { while (clockThread != null) { repaint(); try { clockThread.sleep(1000); }catch (InterruptedException e){ }}} public void stop() { clockThread.stop(); clockThread = null;}public void paint(Graphics g) { Date now = new Date(); g.drawString(now.getHours() + ":" + now.getMinutes() + ":"+ now.getSeconds(), 5, 10); } }