JAVA進階程式設計之線程池

線程池

用于建立多個線程
           

一基本步驟：

1. 提供指定線程數量的線程池
2. 執行指定的線程的操作。需要提供實作Runnable接口或Callable接口實作類的對象
3. 關閉連接配接池

補充：ExecutorService：真正的線程池接口。常見子類ThreadPoolExecutor

二、例題展示

package com.cn.java3;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadPoolExecutor;

class NumberThread implements Runnable {

    @Override
    public void run() {
        for (int i = 0; i <= 100; i++) {
            if (i % 2 == 0) {
                System.out.println(Thread.currentThread().getName() + ": " + i);
            }
        }
    }
}

class NumberThread1 implements Runnable {

    @Override
    public void run() {
        for (int i = 0; i <= 100; i++) {
            if (i % 2 != 0) {
                System.out.println(Thread.currentThread().getName() + ": " + i);
            }
        }
    }
}

public class ThreadPool {

    public static void main(String[] args) {
        //1. 提供指定線程數量的線程池     ExecutorSevice 是接口
        ExecutorService service = Executors.newFixedThreadPool(10);
        ThreadPoolExecutor service1 = (ThreadPoolExecutor) service;//這裡進行強制轉換為類，便于進行屬性的設定。
        //設定線程池的屬性
//        System.out.println(service.getClass());
//        service1.setCorePoolSize(15);
//        service1.setKeepAliveTime();


        //2.執行指定的線程的操作。需要提供實作Runnable接口或Callable接口實作類的對象
        service.execute(new NumberThread());//适合适用于Runnable
        service.execute(new NumberThread1());//适合适用于Runnable

//        service.submit(Callable callable);//适合使用于Callable
        //3.關閉連接配接池
        service.shutdown();
    }

}
           

就到這裡啦，謝謝大家❥(^_-)