#有没有更好的方式实现异步编程呢?#

回调：这涉及到将一个函数作为参数传递给另一个函数，该函数将在第一个函数完成任务时被调用。这是在Java中实现异步编程的一种常见方法。

样例：

public interface Callback {    void onComplete(String result);}public class AsyncClass {    public void doSomethingAsync(Callback callback) {        String result = "Task complete";        callback.onComplete(result);    }}public class Main {    public static void main(String[] args) {        AsyncClass asyncClass = new AsyncClass();        asyncClass.doSomethingAsync(new Callback() {            @Override            public void onComplete(String result) {                System.out.println(result);            }        });    }}

Futures：这涉及到从方法返回Future对象，该对象可用于在异步任务完成时检索其结果。

样例：

public class AsyncClass {    public Future<String> doSomethingAsync() {        // Perform some asynchronous task        String result = "Task complete";        return new AsyncResult<>(result);    }}public class Main {    public static void main(String[] args) throws ExecutionException, InterruptedException {        AsyncClass asyncClass = new AsyncClass();        Future<String> future = asyncClass.doSomethingAsync();        // Do some other work        String result = future.get();        System.out.println(result);    }}

CompletableFuture：这是一种在Java中实现异步编程的更高级的方法，它为处理异步任务提供了更灵活、更强大的API。CompletableFuture实现了Future接口，并在此基础上进行了丰富的扩展，完美弥补了Future的局限性，同时CompletableFuture实现了对任务编排的能力。借助这项能力，可以轻松地组织不同任务的运行顺序、规则以及方式。

样例：

public class AsyncClass {    public CompletableFuture<String> doSomethingAsync() {        return CompletableFuture.supplyAsync(() -> {            // Perform some asynchronous task            String result = "Task complete";            return result;        });    }}public class Main {    public static void main(String[] args) throws ExecutionException, InterruptedException {        AsyncClass asyncClass = new AsyncClass();        CompletableFuture<String> future = asyncClass.doSomethingAsync();        // Do some other work        future.thenAccept(result -> System.out.println(result));    }}