多线程-threadpool

1 Runable实现

package com.zjapp.mythread.threadpool;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class TestMyThread{
	public static void main(String[] args) {
		int threadnum  = 6;
		ExecutorService service  =  Executors.newFixedThreadPool(1000);// 1 初始化
		MyThread[] threads = new MyThread[threadnum];
		for (int i = 0; i < threadnum; i++) {
			threads[i] = new MyThread(i+1);
			service.execute(threads[i]); // 调用
		}
		service.shutdown();// 3 关闭
	}
}
class MyThread implements Runnable{
	private int threadnum;
	public MyThread(int threadnum) {
		this.threadnum  = threadnum;
	}
	public void run() {
		for (int i = 1; i <= 5 ; i++) {
			 System.out.printf("thread: %d: %d\n", threadnum, i);  
			try {
				Thread.sleep(500);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}
}

 

2 Callable实现

public class TestMyThread{
	public static void main(String[] args) {
		int threadnum  = 6;
		ExecutorService service  =  Executors.newFixedThreadPool(1000);// 1 初始化
		MyThread[] threads = new MyThread[threadnum];
		Future[] future = new Future[threadnum] ;
		for (int i = 0; i < threadnum; i++) {
			threads[i] = new MyThread(i+1);
			// service.execute(threads[i]); // 调用
			//future[i] = service.submit(threads[i]);
		}
		for (Future f:future) {
			try {
				System.out.println(f.get()+" 结束了");
			} catch (Exception e) {
				e.printStackTrace();
			} 
		}
		service.shutdown();// 3 关闭
	}
}
class MyThread implements Callable<String> {
	private int threadnum;
	public MyThread(int threadnum) {
		this.threadnum  = threadnum;
	}
	public String call() {
		for (int i = 1; i <= 5 ; i++) {
			 System.out.printf("thread: %d: %d\n", threadnum, i);  
			try {
				Thread.sleep(500);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
		return "线程"+threadnum;
	}
}

 3  Runable接口和Callable在调用的的区别

   Ranable(void run方法)-execute  而 Callable(String call方法)-submit