How do I interrupt ExecutorService threads before shutting it down

In this Q&A, we'll go over how to interrupt threads in an ExecutorService thread pool before shutting down the service

ExecutorService provides a shutdownNow() method that'll invoke Thread.interrupt() on all threads in the pool.  See demo code below on how to use it:

package com.javahowdoi.thread;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

public class InterruptibleThreadDemo {

    public static class InterruptibleRunner implements Runnable

    {

        @Override

        public void run() {

            try {

                Thread.sleep(5000);

            } catch(InterruptedException ie) {

                System.out.println("Thread interrupted");

            }

        }

    }

    public static void main(String[] args) throws InterruptedException {

        ExecutorService es  = Executors.newFixedThreadPool(2); // create thread pool

        // executes Runnable tasks

        es.submit( new InterruptibleRunner());

        es.shutdownNow();

    }

}