笔记20200521004：多线程【线程状态】

package com.chengguo.线程;

/**
 * 观察线程的状态
 */
public class Demo_20200518005_State {
    public static void main(String[] args) throws InterruptedException {
        //创建线程，通过lambda表达式表示
        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();
        state = thread.getState();
        System.out.println(state);//RUN

        //只要线程不终止，就一直输出状态
        while (state != Thread.State.TERMINATED) {
            Thread.sleep(100);
            //更新线程状态
            state = thread.getState();
            //输出状态
            System.out.println(state);
        }
    }
}