What object methods are applicable for implementing concurrent task execution?

In Java, methods from the java.util.concurrent package and the Thread class are often used to implement concurrent task execution. Main methods and approaches:

• Thread.start() — starts a new thread.
• ExecutorService.submit() — submits a task for execution and returns a Future.
• Future.get() — waits for the task to complete and retrieves the result.
• Callable<V> — an interface for tasks that return a result.
• CompletableFuture — for asynchronous programming with the ability to combine tasks.

Example of using ExecutorService:

ExecutorService executor = Executors.newFixedThreadPool(2);
Future<Integer> future = executor.submit(() -> {
    // Some computational task
    return 42;
});

try {
    Integer result = future.get();
    System.out.println("Result: " + result);
} catch (InterruptedException | ExecutionException e) {
    e.printStackTrace();
}
executor.shutdown();

Thus, the methods submit(), get(), start() and tools from java.util.concurrent are fundamental for concurrent execution.