1.8.1suspend与resume方法使用

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暂停线程意味着线程还能恢复运行

suspend()方法暂停线程。resume()恢复线程

测试如下

 package com.cky.thread;

 /**

  * Created by edison on 2017/12/3.

  */

 public class MyThread extends Thread{

     private long i=0;

     public long getI() {

         return i;

     }

     public void setI(long i) {

         this.i = i;

     }

     @Override

     public void run() {

         super.run();

         while(true) {

             i++;

         }

     }

 }

 package com.cky.test;

 import com.cky.thread.MyThread;

 /**

  * Created by edison on 2017/12/3.

  */

 public class Test {

     public static void main(String[] args) {

         try {

             MyThread myThread = new MyThread();

             myThread.start();

             Thread.sleep(5000);

             //A断

             myThread.suspend();

             System.out.println("A= "+ System.currentTimeMillis()+ " i="+myThread.getI());

             Thread.sleep(5000);

             System.out.println("A= "+ System.currentTimeMillis()+ " i="+myThread.getI());

             //B段

             myThread.resume();

             Thread.sleep(5000);

             //c断

             myThread.suspend();

             System.out.println("B= "+ System.currentTimeMillis()+ " i="+myThread.getI());

             Thread.sleep(5000);

             System.out.println("B= "+ System.currentTimeMillis()+ " i="+myThread.getI());

         } catch (InterruptedException e) {

             e.printStackTrace();

         }

     }

 }

C:\itsoft\jdk\bin\java -Didea.launcher.port=7532 "-Didea.launcher.bin.path=C:\itsoft\idea\IntelliJ IDEA 2016.3.3\bin" -Dfile.encoding=UTF-8 -classpath "C:\itsoft\jdk\jre\lib\charsets.jar;C:\itsoft\jdk\jre\lib\deploy.jar;C:\itsoft\jdk\jre\lib\ext\access-bridge-32.jar;C:\itsoft\jdk\jre\lib\ext\cldrdata.jar;C:\itsoft\jdk\jre\lib\ext\dnsns.jar;C:\itsoft\jdk\jre\lib\ext\jaccess.jar;C:\itsoft\jdk\jre\lib\ext\jfxrt.jar;C:\itsoft\jdk\jre\lib\ext\localedata.jar;C:\itsoft\jdk\jre\lib\ext\nashorn.jar;C:\itsoft\jdk\jre\lib\ext\sunec.jar;C:\itsoft\jdk\jre\lib\ext\sunjce_provider.jar;C:\itsoft\jdk\jre\lib\ext\sunmscapi.jar;C:\itsoft\jdk\jre\lib\ext\sunpkcs11.jar;C:\itsoft\jdk\jre\lib\ext\zipfs.jar;C:\itsoft\jdk\jre\lib\javaws.jar;C:\itsoft\jdk\jre\lib\jce.jar;C:\itsoft\jdk\jre\lib\jfr.jar;C:\itsoft\jdk\jre\lib\jfxswt.jar;C:\itsoft\jdk\jre\lib\jsse.jar;C:\itsoft\jdk\jre\lib\management-agent.jar;C:\itsoft\jdk\jre\lib\plugin.jar;C:\itsoft\jdk\jre\lib\resources.jar;C:\itsoft\jdk\jre\lib\rt.jar;C:\多线程核心技术\第一章\out\production\第一章;C:\itsoft\idea\IntelliJ IDEA 2016.3.3\lib\idea_rt.jar" com.intellij.rt.execution.application.AppMain com.cky.test.Test

A= 1512288685100 i=3391077327

A= 1512288690111 i=3391077327

B= 1512288695126 i=6819461694

B= 1512288700129 i=6819461694

结果分析

线程确实被暂停了，而且还可以恢复成运行的状态。