Java 9 Concurrency Cookbook - Second Edition

How to do it...

Perform the following steps to implement the example:

1. Create a class named Task that implements the Runnable interface:

        public class Task implements Runnable { 

2. Declare a private Semaphore attribute named semaphore:

        private final Semaphore semaphore; 

3. Implement the constructor of the class to initialize its attribute:

        public Task(Semaphore semaphore){           this.semaphore=semaphore;         } 

4. Implement the run() method. First, acquire permit for the semaphore attribute writing a message in the console to indicate that circumstance:

        @Override         public void run() {           try {             semaphore.acquire();             System.out.printf("%s: Get the semaphore.\n",                              Thread.currentThread().getName()); 

5. Then, put the thread to sleep for two seconds using ...