【说站】Java Executors中的四种线程池

class ThreadDemo extends Thread {
 
    @Override
 
    public void run() {
 
        System.out.println(Thread.currentThread().getName() + "正在执行");
 
    }
 
}
 
class TestFixedThreadPool {
 
        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 ThreadDemo();
 
        Thread t2 = new ThreadDemo();
 
        Thread t3 = new ThreadDemo();
 
        Thread t4 = new ThreadDemo();
 
        Thread t5 = new ThreadDemo();
 
        //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();
 
        }
 
        }