一、如何调试和查看多线程程序？

命令行下输入：

$ jconsole

二、线程的生命周期?

NEW

RUNNABLE

RUNNING

BLOCKKED

TERMINATED

 

三、例子：

package com.javaconcurrencyprogramming.chapter1; import java.util.concurrent.TimeUnit; import static java.lang.Thread.sleep; /**  * @description: java多线程的一个例子  * @author:  * @create:  **/ public class TryConcurrency {
      public static void main(String[] args) {
      /*     线程启动必须在前      */         /*new Thread(){
              public void run(){
                  enjoyMusic();             }         }.start();         browseNews(); */         //jdk8中的写法         new Thread(TryConcurrency::enjoyMusic).start();         browseNews();     }     private static void browseNews() {
          for (;;){
              System.out.println("Uh-huh, the good news.");             sleep(1);         }     }     private static void enjoyMusic(){
          for (;;){
              System.out.println("Uh-huh, the nice music.");             sleep(1);         }     }     private static void sleep(int seconds){
          try {
              TimeUnit.SECONDS.sleep(seconds);         } catch (InterruptedException e) {
              e.printStackTrace();         }     } }