ThreadFactory简单介绍

介绍

简单来说就是用来创建线程的，其中也只是有一个newthread方法

一些常用的作用

1. 给线程命名，查看创建线程数
2. 给线程设置是否是后台运行
3. 设置线程优先级

示例

• MyThreadFactory

package com.demo.factory;

import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * Created by Administrator
 */
public class MyThreadFactory implements ThreadFactory{

    private AtomicInteger atomicInteger = new AtomicInteger();

    private boolean isDaemon;

    public MyThreadFactory(boolean isDaemon){
        this.isDaemon = isDaemon;
    }

    @Override
    public Thread newThread(Runnable r) {
        atomicInteger.incrementAndGet();
        Thread thread =  new MyWorkThread(atomicInteger,r);
        thread.setDaemon(isDaemon);
        return thread;
    }
}

• MyWorkThread

package com.demo.factory;

import java.util.concurrent.atomic.AtomicInteger;

/**
 * Created by Administrator
 */
public class MyWorkThread extends Thread{
    private AtomicInteger atomicInteger;

    public MyWorkThread(AtomicInteger atomicInteger,Runnable runnable){
        super(runnable);
        this.atomicInteger = atomicInteger;
    }


    @Override
    public void run() {
        System.out.println(this.getName()+" test"+atomicInteger.getAndDecrement());
        super.run();
    }
}

• TestMain

package com.demo.factory;

import java.util.concurrent.*;

/**
 * Created by Administrator
 */
public class TestMain {
    public static void main(String[] args) {
        ExecutorService executorService = Executors.newCachedThreadPool(new MyThreadFactory(false));
        for (int i=0;i<1000;i++){
            executorService.execute(new TestRunnable(String.valueOf(i)));
        }
        executorService.shutdown();

    }

    static class TestRunnable implements Runnable{

        private String msg;

        public TestRunnable(String msg){
            this.msg = msg;
        }
        @Override
        public void run() {
            System.out.println("runnable:"+msg);
        }
    }
}