java 线程池

import java.util.concurrent.Executors;

import java.util.concurrent.ExecutorService;

public class JavaThreadPool {

    public static void main(String[] args) {

// 创建一个可重用固定线程数的线程池

ExecutorService pool = Executors.newFixedThreadPool(2);

// 创建实现了Runnable接口对象，Thread对象当然也实现了Runnable接口

Thread t1 = new MyThread();

Thread t2 = new MyThread();

Thread t3 = new MyThread();

Thread t4 = new MyThread();

Thread t5 = new MyThread();

// 将线程放入池中进行执行

pool.execute(t1);

pool.execute(t2);

pool.execute(t3);

pool.execute(t4);

pool.execute(t5);

// 关闭线程池

pool.shutdown();

    }

}

class MyThread extends Thread {

    @Override

    public void run() {

System.out.println(Thread.currentThread().getName() + "正在执行。。。");

    }

}