Java代码如何检测线程是否存活呢?

实现思路：
    使用Thread类中的isAlive方法即可检测一个线程是否存活

public class TwoThreadAlive extends Thread {
	public void run() {
	for (int i = 0; i < 10; i++) {
		printMsg();
	  }
	}

public void printMsg() {
	Thread t = Thread.currentThread();
    //获取当前线程名称
	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());
  }
}