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。