观察线程状态

package Sleep;
//观察测试线程的状态
/*
    1.new完后新生
    2.就绪
    3.运行-->结束
    3.运行-->阻塞-->结束
 */
public class TestState {
    public static void main(String[] args) throws InterruptedException {
        Thread thread = new Thread(()->{
            for (int i = 0; i < 5; i++) {
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            System.out.println("//////");
        });
        //观察状态
        Thread.State state = thread.getState();
        System.out.println(state);

        //观察启动后
        thread.start();
        state = thread.getState();
        System.out.println("//////");

        while (state != Thread.State.TERMINATED){//只要线程不终止,就一直输出
            Thread.sleep(1000);
            state = thread.getState();//更新线程状态
            System.out.println(state);
        }
        //死亡后的线程不能再次启动
    }
}