执行者（Executor）

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2023-12-01

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

ExecutorService方法

Sr.No.	方法和描述
1	void execute(Runnable command) 在将来的某个时间执行给定的命令。

例子 (Example)

以下TestThread程序显示了基于线程的环境中Executor接口的使用。

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 (Output)

Running Task!
Task Completed