ThreadPoolExecutor 线程池Demo

package threadPoolExecutor;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
 
//自定义线程池
 
public class ThreadPoolExecutorDemo {
 
    public static void main(String[] args) {
        ArrayBlockingQueue<Runnable> queue = new ArrayBlockingQueue<Runnable>(5);
        ThreadPoolExecutor pool = new ThreadPoolExecutor(5, 10, 200, TimeUnit.MILLISECONDS, queue);
        for(int i=0; i<15; i++){
            MyTask myTask = new MyTask(i);
            pool.execute(myTask);
            System.out.println("线程池中的线程数目："+pool.getPoolSize()+",队列中等待执行的任务数量："+pool.getQueue().size()+",已执行完的任务数目："+pool.getCompletedTaskCount());
            
        }
        pool.shutdown();
    }
 
}
 
 
class MyTask implements Runnable{
    
    private int taskNum;
    
    public MyTask(int num){
        this.taskNum = num;
    }
    
    public void run(){
        System.out.println("正在执行task " + taskNum);
        try {
            Thread.sleep(4000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("task "+taskNum+"执行完毕");
    }
    
}