CompletableFuture for Asynchronous Programming in Java

CompletableFuture can represent future results of asynchronous computations and supports fluent API for chaining computation steps and combining multiple futures.

Source Code

CompletableFuture.supplyAsync(() -> {
    // Simulate a long-running Job   
    try {
        TimeUnit.SECONDS.sleep(1);
    } catch (InterruptedException e) {
        throw new IllegalStateException(e);
    }
    return "Result of the asynchronous computation";
}).thenApply(result -> {
    // Executed in the same thread where the previous computation was done
    return "Processed " + result;
}).thenAccept(result -> System.out.println(result));