以下实例演示了如何通过继承Thread类并使用currentThread()方法来检测一个线程是否存活:
/* author by w3cschool.cc TwoThreadAlive.java */public class TwoThreadAlive extends Thread { public void run() { for (int i = 0; i < 10; i++) { printMsg(); } } public void printMsg() { Thread t = Thread.currentThread(); String name = t.getName(); System.out.println("name=" + name); } public static void main(String[] args) { TwoThreadAlive tt = new TwoThreadAlive(); tt.setName("Thread"); System.out.println("before start(), tt.isAlive()=" + tt.isAlive()); tt.start(); System.out.println("just after start(), tt.isAlive()=" + tt.isAlive()); for (int i = 0; i < 10; i++) { tt.printMsg(); } System.out.println("The end of main(), tt.isAlive()=" + tt.isAlive()); }}
以上代码运行输出结果为:
before start(), tt.isAlive()=falsejust after start(), tt.isAlive()=truename=main name=Threadname=main name=main name=main name=main name=main name=main name=main name=main name=main name=Threadname=Threadname=Threadname=Threadname=ThreadThe end of main(), tt.isAlive()=truename=Threadname=Threadname=Threadname=Thread
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