观测线程状态

• 新生
• 就绪
• 运行：阻塞 死亡
• Thread.state

package com.dxch.Demo02;
//观察测试线程的状态
public class TestState {public static void main(String[] args) {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);//new//观察启动后thread.start();//启动线程state = thread.getState();System.out.println(state);//Runwhile(state != Thread.State.TERMINATED){//只要线程不终止，就一直输出状态try {Thread.sleep(100);} catch (InterruptedException e) {throw new RuntimeException(e);}state = thread.getState();//更新线程状态System.out.println(state);//输出状态}}
}

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RUNNABLE
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//
TERMINATED

Process finished with exit code 0

• 死亡之后的线程就不能再次启动了！