Executor Interface

A java.util.concurrent.Executor interface is a simple interface to support launching new tasks.

ExecutorService Methods

Example

The following TestThread program shows usage of Executor interface in thread based environment.

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();
     }
  }
   }
}

This will produce the following result.

Output

Running Task!
Task Completed