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:itsoftjdkinjava -Didea.launcher.port=7532 "-Didea.launcher.bin.path=C:itsoftideaIntelliJ IDEA 2016.3.3in" -Dfile.encoding=UTF-8 -classpath "C:itsoftjdkjrelibcharsets.jar;C:itsoftjdkjrelibdeploy.jar;C:itsoftjdkjrelibextaccess-bridge-32.jar;C:itsoftjdkjrelibextcldrdata.jar;C:itsoftjdkjrelibextdnsns.jar;C:itsoftjdkjrelibextjaccess.jar;C:itsoftjdkjrelibextjfxrt.jar;C:itsoftjdkjrelibextlocaledata.jar;C:itsoftjdkjrelibext
ashorn.jar;C:itsoftjdkjrelibextsunec.jar;C:itsoftjdkjrelibextsunjce_provider.jar;C:itsoftjdkjrelibextsunmscapi.jar;C:itsoftjdkjrelibextsunpkcs11.jar;C:itsoftjdkjrelibextzipfs.jar;C:itsoftjdkjrelibjavaws.jar;C:itsoftjdkjrelibjce.jar;C:itsoftjdkjrelibjfr.jar;C:itsoftjdkjrelibjfxswt.jar;C:itsoftjdkjrelibjsse.jar;C:itsoftjdkjrelibmanagement-agent.jar;C:itsoftjdkjrelibplugin.jar;C:itsoftjdkjrelib
esources.jar;C:itsoftjdkjrelib
t.jar;C:多线程核心技术第一章outproduction第一章;C:itsoftideaIntelliJ IDEA 2016.3.3libidea_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。