线程继承和实现共享资源

最新推荐文章于 2023-12-09 08:05:42 发布

原创最新推荐文章于 2023-12-09 08:05:42 发布 · 451 阅读

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#多线程

本文通过两个Java示例展示了多线程环境下实现资源同步访问的方法。第一个示例使用Thread子类并应用synchronized关键字确保售票操作的同步；第二个示例则通过实现Runnable接口，并在成员方法中使用synchronized关键字来达到相同目的。

public class ThreadTest3 {
   public static void main(String[] args){
       Thread t1 = new Ticket3("t1");
       Thread t2 = new Ticket3("t2");
       Thread t3 = new Ticket3("t3");
       t1.start();
       t2.start();
       t3.start();
   }

}

class Ticket3 extends Thread{
   private static int NUM = 50;

   public Ticket3(String name) {
       super.setName(name);
   }

   public static synchronized void sale(){
       try {
           Thread.sleep(20);
           if(NUM>0){
               System.out.println(Thread.currentThread().getName()+"售出:"+(NUM--));
           }
       } catch (InterruptedException e) {
           e.printStackTrace();
       }finally{

       }
   }

   @Override
   public void run(){
       while (true) {
           sale();
       }
   }
}
---------------------------------------------------华丽分割线------------------------------------------------

public class ThreadTest {
   public static void main(String[] args){
       Ticket ticket = new Ticket();
       Thread t1 = new Thread(ticket,"t1");
       Thread t2 = new Thread(ticket,"t2");
       Thread t3 = new Thread(ticket,"t3");
       t1.start();
       t2.start();
       t3.start();
   }

}

class Ticket implements Runnable{
   private static int NUM = 50;

   @Override
   public void run() {
       sale();
   }

   private void sale() {
       while (true) {
           synchronized(this){
               try {
                   Thread.sleep(20);
                   if(NUM>0){
                       System.out.println(Thread.currentThread().getName()+"售出:"+(NUM--));
                   }else{
                       System.out.println(Thread.currentThread().getName()+"break");
                       break;
                   }
               } catch (InterruptedException e) {
                   e.printStackTrace();
               }
           }
       }

   }

}