# import java.io.*;
# //多线程编程
# public class MultiThread
# {
# public static void main(String args[])
# {
# System.out.println("我是主线程!");
# //下面创建线程实例thread1
# ThreadUseExtends thread1=new ThreadUseExtends();
# //创建thread2时以实现了Runnable接口的THhreadUseRunnable类实例为参数
# Thread thread2=new Thread(new ThreadUseRunnable(),"SecondThread");
# thread1.start();//启动线程thread1使之处于就绪状态
# //thread1.setPriority(6);//设置thread1的优先级为6
# //优先级将决定cpu空出时,处于就绪状态的线程谁先占领cpu开始运行
# //优先级范围1到10,MIN_PRIORITY,MAX_PRIORITY,NORM_PAIORITY
# //新线程继承创建她的父线程优先级,父线程通常有普通优先级即5NORM_PRIORITY
# System.out.println("主线程将挂起7秒!");
# try
# {
# Thread.sleep(7000);//主线程挂起7秒
# }
# catch (InterruptedException e)
# {
# return;
# }
# System.out.println("又回到了主线程!");
# if(thread1.isAlive())
# {
# thread1.stop();//如果thread1还存在则杀掉他
# System.out.println("thread1休眠过长,主线程杀掉了thread1!");
# }
# else
# System.out.println("主线程没发现thread1,thread1已醒顺序执行结束了!");
# thread2.start();//启动thread2
# System.out.println("主线程又将挂起7秒!");
# try
# {
# Thread.sleep(7000);//主线程挂起7秒
# }
# catch (InterruptedException e)
# {
# return;
# }
# System.out.println("又回到了主线程!");
# if(thread2.isAlive())
# {
# thread2.stop();//如果thread2还存在则杀掉他
# System.out.println("thread2休眠过长,主线程杀掉了thread2!");
# }
# else
# System.out.println("主线程没发现thread2,thread2已醒顺序执行结束了!");
# System.out.println("程序结束按任意键继续!");
# try
# {
# System.in.read();
# }
# catch (IOException e)
# {
# System.out.println(e.toString());
# }
#
# }//main
# }//MultiThread
#
#
# class ThreadUseExtends extends Thread
# //通过继承Thread类,并实现它的抽象方法run()
# //适当时候创建这一Thread子类的实例来实现多线程机制
# //一个线程启动后(也即进入就绪状态)一旦获得CPU将自动调用它的run()方法
# {
#
# ThreadUseExtends(){}//构造函数
# public void run()
# {
# System.out.println("我是Thread子类的线程实例!");
# System.out.println("我将挂起10秒!");
# System.out.println("回到主线程,请稍等,刚才主线程挂起可能还没醒过来!");
# try
# {
# sleep(10000);//挂起5秒
# }
# catch (InterruptedException e)
# {
# return;
# }
# //如果该run()方法顺序执行完了,线程将自动结束,而不会被主线程杀掉
# //但如果休眠时间过长,则线程还存活,可能被stop()杀掉
# }
# }
#
#
# class ThreadUseRunnable implements Runnable
# //通过实现Runnable接口中的run()方法,再以这个实现了run()方法的类
# //为参数创建Thread的线程实例
# {
# //Thread thread2=new Thread(this);
# //以这个实现了Runnable接口中run()方法的类为参数创建Thread类的线程实例
# ThreadUseRunnable(){}//构造函数
# public void run()
# {
# System.out.println("我是Thread类的线程实例并以实现了Runnable接口的类为参数!");
# System.out.println("我将挂起1秒!");
# System.out.println("回到主线程,请稍等,刚才主线程挂起可能还没醒过来!");
# try
# {
# Thread.sleep(1000);//挂起5秒
# }
# catch (InterruptedException e)
# {
# return;
# }
# //如果该run()方法顺序执行完了,线程将自动结束,而不会被主线程杀掉
# //但如果休眠时间过长,则线程还存活,可能被stop()杀掉
# }
#
# }
# //该程序可做的修改如改休眠时间或优先级setPriority()