1.10　方法getId()

getId()方法可以取得线程的唯一数字标识。

创建测试项目runThread，创建Test.java类，代码如下：

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package test1;

public class Test {
    public static void main(String[] args) {
        Thread runThread = Thread.currentThread();
        System.out.println(runThread.getName() + " " + runThread.getId());
        Thread t1 = new Thread();
        System.out.println(t1.getName() + " " + t1.getId());
        Thread t2 = new Thread();
        System.out.println(t2.getName() + " " + t2.getId());
        Thread t3 = new Thread();
        System.out.println(t3.getName() + " " + t3.getId());
        Thread t4 = new Thread();
        System.out.println(t4.getName() + " " + t4.getId());
        Thread t5 = new Thread();
        System.out.println(t5.getName() + " " + t5.getId());
    }
}

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图1-36　获取线程名称及id值

程序运行结果如图1-36所示。

从运行结果来看，当前执行代码的线程名为main，线程id值为1。

而Thread-0线程的id值直接到达11，说明中间有9个id值被隐藏的线程占有。