1.2.2实现Runnable接口

使用Runnable创建线程

 package com.cky.runner;

 /**
  * Created by chenkaiyang on 2017/12/2.
  */
 public class MyRunnable implements  Runnable{
     @Override
     public void run() {
         System.out.println("运行中");
     }
 }

test类

 package com.cky.test;

 import com.cky.runner.MyRunnable;

 /**
  * Created by chenkaiyang on 2017/12/2.
  */
 public class Test {
     public static void main(String[] args){
         MyRunnable myRunnable = new MyRunnable();
         Thread thread = new Thread(myRunnable);
         thread.start();
         System.out.println("运行结束");

     }
 }

D:\it\jdk1.8\bin\java -Didea.launcher.port=7532 "-Didea.launcher.bin.path=D:\it\idea\IntelliJ IDEA 2016.3.3\bin" -Dfile.encoding=UTF-8 -classpath "D:\it\jdk1.8\jre\lib\charsets.jar;D:\it\jdk1.8\jre\lib\deploy.jar;D:\it\jdk1.8\jre\lib\ext\access-bridge-64.jar;D:\it\jdk1.8\jre\lib\ext\cldrdata.jar;D:\it\jdk1.8\jre\lib\ext\dnsns.jar;D:\it\jdk1.8\jre\lib\ext\jaccess.jar;D:\it\jdk1.8\jre\lib\ext\jfxrt.jar;D:\it\jdk1.8\jre\lib\ext\localedata.jar;D:\it\jdk1.8\jre\lib\ext\nashorn.jar;D:\it\jdk1.8\jre\lib\ext\sunec.jar;D:\it\jdk1.8\jre\lib\ext\sunjce_provider.jar;D:\it\jdk1.8\jre\lib\ext\sunmscapi.jar;D:\it\jdk1.8\jre\lib\ext\sunpkcs11.jar;D:\it\jdk1.8\jre\lib\ext\zipfs.jar;D:\it\jdk1.8\jre\lib\javaws.jar;D:\it\jdk1.8\jre\lib\jce.jar;D:\it\jdk1.8\jre\lib\jfr.jar;D:\it\jdk1.8\jre\lib\jfxswt.jar;D:\it\jdk1.8\jre\lib\jsse.jar;D:\it\jdk1.8\jre\lib\management-agent.jar;D:\it\jdk1.8\jre\lib\plugin.jar;D:\it\jdk1.8\jre\lib\resources.jar;D:\it\jdk1.8\jre\lib\rt.jar;F:\springboot\threaddemo\out\production\threaddemo;D:\it\idea\IntelliJ IDEA 2016.3.3\lib\idea_rt.jar" com.intellij.rt.execution.application.AppMain com.cky.test.Test
运行结束
运行中

Process finished with exit code 0

因为java是单根集继承，不支持多继承，为了改变这个限制，使用runnable接口实现多线程

注：Thread类也实现了Runnerable接口，那说明了构造函数不仅仅可以传入runnable接口对象，也可以传递Thread对象，这样做完全可以将一个Thread对象的run方法交给其他线程调用