如何在JAVA中用三线程打印数字1到31？

Question

我正在尝试使用三个线程按顺序打印数字 1 到 31。 当数字变为 31 时，我要将 output “(current Thread) 打败。” 也可以是 output 最多 3 个。

所以我想像 output

线程一印：1 2 线程二印：3 4 5 线程三印：6 7 线程一印：8…… 线程三印：31 线程三败

程序结束。

    public class MyRunnable implements Runnable {
    Stack sta = new Stack();
    
    public void run() {
        while(sta.getStack()<=31){
            int stack = 1;
            stack++;
            
            sta.setStack(stack);
            
            System.out.println(Thread.currentThread().getName() + "print: "+ stack);
            
        }
        
    }

}
////////////

        public class Stack {
        private int stack = 1;
        
        public synchronized void setStack (int stack) {
            for(int cnt = 1; cnt<=31; cnt ++) {
                
            try {
                 
                Thread.sleep(100);
                
            } catch (InterruptedException e) {  
                
            }
            
        
            System.out.println(Thread.currentThread().getName() + "defeated.");
            
        }
            
    }
        public int getStack() {
            return this.stack;
        }
    
    }

////////////////////

    public class ThreadTest {
    public static void main(String[] args) {
        
        Runnable threadRun = new MyRunnable();
        
        Thread myThread1 = new Thread(threadRun);
        Thread myThread2 = new Thread(threadRun);
        Thread myThread3 = new Thread(threadRun);
        
        myThread1.setName("Thread One");
        myThread2.setName("Thread Two");
        myThread3.setName("Thread Three");
        

        myThread1.start();
        myThread2.start();
        myThread3.start();


    }

}

我上了3节课。 但它只打印“Thread One output defeat”我不知道是什么问题。 它不会按顺序打印线程。 我不擅长使用这个平台，所以很抱歉看起来很奇怪。

Answer 1

我试了一下，想出了这个：

public class MyRunnable implements Runnable {
Stack sta = new Stack();

@Override
public void run() {
    while (sta.getStack() <= 31) {
        int stack = sta.getStack() + 1;
        sta.setStack(stack);

        if (stack <= 31) {
            System.out.println(Thread.currentThread().getName() + " print: " + stack);
        }
    }
}
}

public class Stack {
private int stack = 0;

public synchronized void setStack(int stack) {
    this.stack = stack;
    try {
        Thread.sleep(100);
    } catch (InterruptedException e) {
    }
    if (stack > 31) {
        System.out.println(Thread.currentThread().getName() + " defeated.");
    }
}

public synchronized int getStack() {
    return this.stack;
}
}

public class ThreadTest {
public static void main(String[] args) {

    Runnable threadRun = new MyRunnable();

    Thread myThread1 = new Thread(threadRun);
    Thread myThread2 = new Thread(threadRun);
    Thread myThread3 = new Thread(threadRun);

    myThread1.setName("Thread One");
    myThread2.setName("Thread Two");
    myThread3.setName("Thread Three");

    myThread1.start();
    myThread2.start();
    myThread3.start();

}
}