WordLengthCallable.java Source code

Introduction

Here is the source code for WordLengthCallable.java

Source

import java.util.Random;
import java.util.concurrent.Callable;
import java.util.concurrent.CompletionService;
import java.util.concurrent.ExecutorCompletionService;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

class WordLengthCallable implements Callable<Integer> {
    private Random random = new Random();

    public Integer call() throws InterruptedException {
        int sleepTime = (2 + random.nextInt(16)) * 500;
        Thread.sleep(sleepTime);
        return sleepTime;
    }
}

public class Main {
    public static void main(String[] args) throws Exception {
        int THREAD_COUNT = 4;
        ExecutorService execService = Executors.newFixedThreadPool(THREAD_COUNT);
        CompletionService<Integer> completionService = new ExecutorCompletionService<>(execService);

        for (int i = 0; i < THREAD_COUNT; i++) {
            completionService.submit(new WordLengthCallable());
        }
        execService.shutdown();
        while (!execService.isTerminated()) {
            int result = completionService.take().get().intValue();
            System.out.println("Result is: " + result);
        }
        Thread.sleep(1000);
        System.out.println("done!");
    }
}