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ThreadPoolExecutor的七個參數:

• corePoolSize 核心線程數
• MaxPS? 最大線程數
• keepAliveTime? 存活時間
• TimeUnit? 時間單位
• BlockingQueue? 任務隊列
• ThreadFactory? 線程工廠
• RejectStrategy? 拒絕策略

Abort??? 拋異常

Discard 悄悄扔掉

DiscardOld 扔掉最先的任務

CallerRuns 誰提交任務誰來執行

package com.zhangxueliang.demo.springbootdemo.JUC.c_026_01_ThreadPool;import java.util.concurrent.ArrayBlockingQueue; import java.util.concurrent.Executors; import java.util.concurrent.ThreadPoolExecutor; import java.util.concurrent.TimeUnit;/*** @ProjectName springbootdemo_src* @ClassName T05_00_HelloThreadPool* @Desicription TODO* @Author Zhang Xueliang* @Date 2019/12/5 15:34* @Version 1.0**/ public class T05_00_HelloThreadPool{public class Task implements Runnable{int i;public Task(int i) {this.i = i;}@Overridepublic void run() {System.err.println(Thread.currentThread().getName()+" "+i);}} }class Test_T05_00_HelloThreadPool{public static void main(String[] args) {T05_00_HelloThreadPool t05_00_helloThreadPool = new T05_00_HelloThreadPool();ThreadPoolExecutor threadPoolExecutor = new ThreadPoolExecutor(2, 4, 60, TimeUnit.SECONDS,new ArrayBlockingQueue<Runnable>(4), Executors.defaultThreadFactory(), new ThreadPoolExecutor.AbortPolicy());try{for (int i = 0; i < 8; i++) {threadPoolExecutor.execute(t05_00_helloThreadPool.new Task(i));}System.err.println(threadPoolExecutor.getQueue());}finally {threadPoolExecutor.shutdown();}} }

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