java - java中默认的新线程名称是如何给出的？

Question

当我运行这个程序时

public class Fabric extends Thread {
    public static void main(String[] args) {
        Thread t1 = new Thread(new Fabric());
        Thread t2 = new Thread(new Fabric());
        Thread t3 = new Thread(new Fabric());
        t1.start();
        t2.start();
        t3.start();
    }
    public void run() {
        for(int i = 0; i < 2; i++)
        System.out.print(Thread.currentThread().getName() + " ");
    }
}

我得到输出

Thread-1 Thread-5 Thread-5 Thread-3 Thread-1 Thread-3

线程被赋予奇数名称 - 1, 3, 5... 或者它是不可预测的，有什么具体原因吗？

Answer 1

new Thread(new Fabric());

由于 Fabric 是一个线程，您在这里创建了 2 个线程:)

JDK8代码:

/* For autonumbering anonymous threads. */
private static int threadInitNumber;
private static synchronized int nextThreadNum() {
    return threadInitNumber++;
}