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            什么是java線程池框架

            時間:2025-09-14 10:22:14 java語言

            什么是java線程池框架

              多線程是程序員面試時常常會面對的問題,對多線程概念的掌握和理解水平,也常常被用來衡量一個人的編程實力。不錯,普通的多線程已經不容易了。

              一、線程池結構圖

              二、示例

              定義線程接口

              6public class MyThread extends Thread {@Overridepublicvoid run() {System.out.println(Thread.currentThread().getName() + "正在執行");}}

              1:newSingleThreadExecutor

              10ExecutorService pool = Executors. newSingleThreadExecutor();Thread t1 = new MyThread();Thread t2 = new MyThread();Thread t3 = new MyThread();/pic/pic/p>

              輸入結果:

              3pool-1-thread-1正在執行pool-1-thread-1正在執行pool-1-thread-1正在執行

              2:newFixedThreadPool

              13ExecutorService pool = Executors.newFixedThreadPool(3);Thread t1 = new MyThread();Thread t2 = new MyThread();Thread t3 = new MyThread();Thread t4 = new MyThread();Thread t5 = new MyThread();/pic/p>

              輸入結果:

              4pool-1-thread-1正在執行pool-1-thread-2正在執行pool-1-thread-1正在執行pool-1-thread-2正在執行

              3 :newCachedThreadPool

              14ExecutorService pool = Executors.newCachedThreadPool();Thread t1 = new MyThread();Thread t2 = new MyThread();Thread t3 = new MyThread();Thread t4 = new MyThread();Thread t5 = new MyThread();/pic/pic/p>

              輸入結果:

              5pool-1-thread-2正在執行pool-1-thread-4正在執行pool-1-thread-3正在執行pool-1-thread-1正在執行pool-1-thread-5正在執行

              4 :ScheduledThreadPoolExecutor

              14ScheduledExecutorService pool = Executors.newScheduledThreadPool(2);pool.scheduleAtFixedRate(new Runnable() {/pic/pic/pic/p>

              輸入結果:

              4================+++++++++++++++++++++++++++++++++++++++++++++++++++

              三、線程池核心參數

              corePoolSize : 池中核心的線程數

              maximumPoolSize : 池中允許的最大線程數。

              keepAliveTime : 當線程數大于核

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