Java线程同步 [英] Java thread synchronization

问题描述

我想用2个线程显示我的名字和姓氏。一旦用户点击ctrl与一些密钥程序应该终止。请建议我开始这个。这是我的代码，它只显示一个版本。但是我希望在用户按下某个键之前显示它。

i want to display my first name and last name using 2 threads. Once user click ctrl with some key programe should be terminate. Please advice me to begin this. here is my code and it is display only one tome. but i want to display this into until user press some key.

 class Thread_Ex11{
public static void main(String[] args) {
        Thread t1 = new Thread(new MyRunnable(), "gayan");
        Thread t2 = new Thread(new MyRunnable(), "suranga");
        t1.start();
        try {
            t1.join(2000);
            t2.join(2000); 
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
          
            t2.start();
            t1.start();  

        try {
            t1.join();
            t2.join();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
      
        }

}

class MyRunnable implements Runnable{

    @Override
    public void run() {
       while(true){
        System.out.println(Thread.currentThread().getName());
             
       }  
  }
    
}

什么我试过了：



我这个程序编译的输出

这是一个

这是两个



但是我想出去的是

这是一个

这是两个

这是一个

这是两个

等....

终止

What I have tried:

my out put of this programme compiling
this is one
this is two

but i want out put is
this is one
this is two
this is one
this is two
etc....
terminated

推荐答案

您需要在两个线程中添加循环，以便它们一遍又一遍地打印相同的文本。您可能还需要添加某种形式的延迟，以免它们在系统中失控。在启动线程后的main方法中，需要等待按键或控制台输入。此时它应该终止两个线程。

You need to add loops into your two threads so they keep printing the same text over and over. You may also need to add some form of delay so they do not run away with the system. And in your main method after starting the threads it needs to wait for a keypress or console input. At that point it should terminate the two threads.

试试这个，它适用于我。

Try this, it works for me.

public class Thread_Ex {
    public static void main(String [] args) {
        Thread t1 = new Thread(new MyRunnable(), "gayan");
        Thread t2 = new Thread(new MyRunnable(), "suranga");
        
        t1.start();
        t2.start();
        while (true) {
            try {
                System.in.read();
                t1.interrupt();
                t2.interrupt();
            }
            catch (Exception eee) {
                //
            }
        }
    }
}

class MyRunnable implements Runnable {
    @Override
    public void run() {
        while(true) {
            System.out.println(Thread.currentThread().getName());
            try {
                Thread.sleep(200);
            }
            catch (InterruptedException zz) {
                //
            }
            
            if (Thread.interrupted()) {
                System.out.println("interrupted");
                break;
            }
        } 
    }
}

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