Java 并发 - Executor 接口

java.util.concurrent.Executor 接口是一个支持启动新任务的简单接口。

ExecutorService 方法

示例

以下 TestThread 程序显示了 Executor 接口在基于线程的环境中的用法。

import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

public class TestThread {

   public static void main(final String[] arguments) throws InterruptedException {
      Executor executor = Executors.newCachedThreadPool();
      executor.execute(new Task());
      ThreadPoolExecutor pool = (ThreadPoolExecutor)executor;
      pool.shutdown();
   }  

   static class Task implements Runnable {
      
      public void run() {
         
         try {
            Long duration = (long) (Math.random() * 5);
            System.out.println("Running Task!");
            TimeUnit.SECONDS.sleep(duration);
            System.out.println("Task Completed");
         } catch (InterruptedException e) {
            e.printStackTrace();
         }
      }
   }
}

这将产生以下结果。

输出

Running Task!
Task Completed