What methods can be used to implement data stream creation in Java?

In Java, creating data streams (execution threads) can be implemented in several ways:

1. Inheriting from the Thread class Create a class that inherits from Thread and override the run() method.

class MyThread extends Thread {
    public void run() {
        System.out.println("Thread started");
    }
}

MyThread t = new MyThread();
t.start();

2. Implementing the Runnable interface Create a class that implements Runnable and pass it to the Thread constructor.

class MyRunnable implements Runnable {
    public void run() {
        System.out.println("Thread via Runnable");
    }
}

Thread t = new Thread(new MyRunnable());
t.start();

3. Using lambda expressions (since Java 8)

Thread t = new Thread(() -> System.out.println("Thread via lambda"));
 t.start();

4. Using ExecutorService and thread pools

ExecutorService executor = Executors.newFixedThreadPool(2);
executor.submit(() -> System.out.println("Task in thread pool"));
executor.shutdown();

These methods allow creating and managing threads for parallel task execution.