Java如何检测当前进程的状态呢？

实现思路:
       1.使用Thread.currentThread()获取当前进程
  2.使用isAlive()获取进程的状态

public class testThreadAlive extends Thread {
   public void run() {
      for (int i = 0; i < 4; i++) {
         printMsg();
      }
   }

   public void printMsg() {
      Thread t = Thread.currentThread();
      String name = t.getName();
      System.out.println("进程名称:" + name);
   }

   public static void main(String[] args) {
      testThreadAlive t= new testThreadAlive();
      t.setName("MyThread");
      System.out.println(t.isAlive());
      t.start();     
      System.out.println(t.isAlive());
   }
}