预期多线程输出

Question

我是Java和多线程概念的新手.这是我的实验代码:

public class Multithread implements Runnable {

    Thread t;

    public Multithread(int prior, String name) {
        this.t = new Thread(this, name);
        this.t.setPriority(prior);
        this.t.start();
    }

    public void run() {
        for (int i = 1; i <= 5; i++) {
            if (this.t.getName().equals("thread1")) {
                System.out.println("First Child Thread Loop No " + i);
            }
            else {
                System.out.println("Second Child Thread Loop No " + i);
            }

            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                System.out.println(e);
            }
        }
    }

    public static void main(String[] args) {
        new Multithread(10, "thread1");
        new Multithread(7, "thread2");
    }
}

输出是:

First Child Thread Loop No 1
Second Child Thread Loop No 1
First Child Thread Loop No 2
Second Child Thread Loop No 2
Second Child Thread Loop No 3
First Child Thread Loop No 3
Second Child Thread Loop No 4
First Child Thread Loop No 4
Second Child Thread Loop No 5
First Child Thread Loop No 5

好吧,我希望这很简单:

First Child Thread Loop No 1
Second Child Thread Loop No 1
First Child Thread Loop No 2
Second Child Thread Loop No 2
First Child Thread Loop No 3
Second Child Thread Loop No 3
First Child Thread Loop No 4
Second Child Thread Loop No 4
First Child Thread Loop No 5
Second Child Thread Loop No 5

我希望第一个线程始终在第二个线程之前执行.请解释我的输出.提前致谢.

Answer 1

原因是当线程开始运行时你无法猜测它们出现的非常基本的线程问题的顺序 - 你可以阅读: http://www.codeproject.com/Articles/616109/Java-Thread-Tutorial 或http:/ /www.vogella.com/articles/JavaConcurrency/article.html 或任何其他基本的线程导师.祝好运.