如果用Runnable就可以实现资源共享[Java多线程]

时间:2023-01-09 17:28:53
class MyThread extends Thread{  
private int ticket=10;
public void run(){
for(int i=0;i<20;i++){
if(this.ticket>0){
System.out.println("卖票:ticket"+this.ticket--);
}
}
}
}


public class ThreadTicket {
public static void main(String[] args) {
MyThread mt1=new MyThread();
MyThread mt2=new MyThread();
MyThread mt3=new MyThread();
mt1.start();//每个线程都各卖了10张,共卖了30张票
mt2.start();//但实际只有10张票,每个线程都卖自己的票
mt3.start();//没有达到资源共享
}
}
/*
卖票:ticket10
卖票:ticket10
卖票:ticket9
卖票:ticket9
卖票:ticket8
卖票:ticket10
卖票:ticket7
卖票:ticket8
卖票:ticket6
卖票:ticket9
卖票:ticket5
卖票:ticket7
卖票:ticket4
卖票:ticket8
卖票:ticket7
卖票:ticket6
卖票:ticket5
卖票:ticket4
卖票:ticket3
卖票:ticket2
卖票:ticket6
卖票:ticket1
卖票:ticket3
卖票:ticket2
卖票:ticket1
卖票:ticket5
卖票:ticket4
卖票:ticket3
卖票:ticket2
卖票:ticket1
请按任意键继续. . .
*/
//如果用Runnable就可以实现资源共享,下面看例子: class MyThread implements Runnable{  	private int ticket=10;  	public void run(){  		for(int i=0;i<20;i++){  			if(this.ticket>0){  			System.out.println("卖票:ticket"+this.ticket--);  			}  		}  	}  }  public class RunnableTicket {  	public static void main(String[] args) {  		MyThread mt=new MyThread();  		new Thread(mt).start();//同一个mt,但是在Thread中就不可以,如果用同一  		new Thread(mt).start();//个实例化对象mt,就会出现异常  		new Thread(mt).start();  	}  }//虽然现在程序中有三个线程,但是一共卖了10张票,也就是说使用Runnable实现多线程可以达到资源共享目的。/*卖票:ticket10卖票:ticket8卖票:ticket6卖票:ticket9卖票:ticket5卖票:ticket7卖票:ticket3卖票:ticket1卖票:ticket4卖票:ticket2请按任意键继续. . .*/