Best practices for implementing Executors?

        // Example of using Executors in Android
        import java.util.concurrent.ExecutorService;
        import java.util.concurrent.Executors;

        public class ExampleExecutor {
            private ExecutorService executorService;

            public ExampleExecutor() {
                // Create a fixed thread pool
                executorService = Executors.newFixedThreadPool(3); 
            }

            public void executeTask(Runnable task) {
                executorService.execute(task); // Submit a task for execution
            }

            public void shutDown() {
                executorService.shutdown(); // Properly shutdown the executor
            }

            public static void main(String[] args) {
                ExampleExecutor example = new ExampleExecutor();
                
                // Creating a runnable task
                Runnable task = new Runnable() {
                    @Override
                    public void run() {
                        System.out.println("Task is executing in: " + Thread.currentThread().getName());
                    }
                };

                // Execute the task
                example.executeTask(task);
                example.shutDown(); // Call shutdown after task execution
            }
        }