线程状态观测

 

• Thread.State

一个线程可以在给定时间点处于一个状态。这些状态是不反映任何操作系统线程状态的虚拟状态

package com.hua.demo;

//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);//run

        while (state != Thread.State.TERMINATED){//只要线程不终止，就一直输出状态
            try {
                Thread.sleep(1000);
                state = thread.getState();//更新线程状态
                System.out.println(state);//输出线程状态
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

    }
}