1.8.1suspend与resume方法使用

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。