What tools and constructs are used in Java Core to implement asynchronous programming?

In Java Core, the following tools are used for asynchronous programming:

• Thread — the basic class for creating and managing threads.
• Runnable and Callable — interfaces for defining tasks, with Callable allowing returning results and throwing exceptions.
• ExecutorService — an interface for managing thread pools and executing tasks asynchronously.
• Future and CompletableFuture — for obtaining the result of an asynchronous operation and building processing chains.

Example of using CompletableFuture:

import java.util.concurrent.CompletableFuture;

public class AsyncExample {
    public static void main(String[] args) {
        CompletableFuture.supplyAsync(() -> {
            // Long operation
            return "Result";
        }).thenAccept(result -> {
            System.out.println("Received: " + result);
        });

        System.out.println("Main thread continues to work");
    }
}