How to use multithreading to execute tasks in batch in java

In this issue, the editor will bring you about how to use multithreading to execute tasks in batches in java. The article is rich in content and analyzes and describes for you from a professional point of view. I hope you can get something after reading this article.

Import java.util.*;import java.util.concurrent.*;public class TestThread {public static void main (String [] args) throws ExecutionException, InterruptedException {System.out.println ("- the program starts running -"); Date beginTime = new Date (); / / create a thread pool with a capacity of 3 ExecutorService pool = Executors.newFixedThreadPool (3); List list = new LinkedList () / / create 10 for tasks with return values (int I = 0; I

< 10; i++) { Callable c = new MyCallable(i + " "); // 执行任务并获取Future对象 Future f = pool.submit(c); list.add(f); } // 关闭线程池：会在所有任务执行完成后关闭线程池，但并不会阻塞程序运行 pool.shutdown(); // 获取所有并发任务的运行结果 for (Future f : list) { System.out.println(">

> "+ f.get ();} System.out.println ("-the program ends running -, program running time ["+ (new Date (). GetTime ()-beginTime.getTime ()) +" millisecond]);}} class MyCallable implements Callable {private String taskNum; MyCallable (String taskNum) {this.taskNum = taskNum } public Object call () throws Exception {Date beginTime = new Date (); System.out.println (">" + taskNum + "Task start"); Thread.sleep (new Random (). NextInt (5000)); System.out.println (">" + taskNum + "Task end"); return taskNum + "Task time:" + (new Date (). GetTime ()-beginTime.getTime ()) }} above is how to use multithreading to execute tasks in batch in java shared by Xiaobian. If you happen to have similar doubts, please refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.