Explain the concept of Executor in Java and its role in executing asynchronous tasks.

Executor in Java is an interface that simplifies the execution of asynchronous tasks by separating thread creation and management from execution logic.

Role of Executor:

• Allows running tasks (Runnable or Callable) without direct thread management.
• Manages a thread pool, reusing threads to improve performance.
• Provides a convenient way to organize parallel execution.

Example of usage:

Executor executor = Executors.newFixedThreadPool(2);
executor.execute(() -> {
    // task code
    System.out.println("Executing in a separate thread");
});

Thus, Executor helps efficiently perform asynchronous operations, enhancing scalability and responsiveness of applications.