两种方式实现多线程共享资源（典型的售票例子）

系统管理员 2022-07-14 05:13 214阅读 0赞

1、继承Thread

TestThread类

public class TestThread extends Thread{
    	private  int ticket = 300;
    	@Override
    	public void run() {
    		while(true){
    			try {
    				Thread.sleep(10);
    			} catch (Exception e) {
    				e.printStackTrace();
    			}
    			sale();
    			if(ticket <= 0)
    				break;
    		}
    	}
    	
    	public synchronized void sale(){
    		if(ticket > 0){
    			System.out.println(Thread.currentThread().getName() +"-->"+ ticket--);
    		}
    	}
    
    }

2、Runable接口

TestRunable类

package mytestthread;
    
    public class TestRunable implements Runnable{
    	public int tic = 300;
    	
    	@Override
    	public void run() {
    		
    		while(true){
    			try {
    				Thread.sleep(10);
    			} catch (InterruptedException e) {
    				e.printStackTrace();
    			}
    			sale();
    			if(tic <= 0)
    				break;
    		}
    	}
    	
    	public synchronized void sale(){
    
    		if(tic > 0){
    			System.out.println(Thread.currentThread().getName() + "--" + tic--);
    		}
    	}
    
    }

3、main函数

package mytestthread;
    
    public class MyThead{
    
    	/**
    	 * @param args
    	 */
    	public static void main(String[] args) {
    		/*TestRunable t1 = new TestRunable();
    		Thread thread1 = new Thread(t1, "te1");
    		Thread thread2 = new Thread(t1, "te2");
    		Thread thread3 = new Thread(t1, "te3");
    		Thread thread4 = new Thread(t1, "te4");
    		
    		thread1.start();
    		thread2.start();
    		thread3.start();
    		thread4.start();*/
    		
    		TestThread t = new TestThread();
    		Thread aa =new Thread(t,"aa");
    		Thread bb =new Thread(t,"bb");
    		Thread cc =new Thread(t,"cc");
    		aa.start();
    		bb.start();
    		cc.start();
    	}
    
    }
    
    
    看了几篇文章感觉没达到资源共享的目的，资源共享需要synchronized锁，并且需要同一个对象才有效。