CompletableFuture.supplyAsync 改成同步的

CompletableFuture.supplyAsync是Java8中引入的一种异步编程方式，它可以在后台线程中执行某些任务，并在任务完成后返回结果。如果需要将其改为同步的，可以使用CompletableFuture.get()方法来获取结果，这会使当前线程阻塞直到结果返回。示例如下：

CompletableFuture<String> future = CompletableFuture.supplyAsync(() -> {
    // 执行一些耗时的操作
    return "result";
});
String result = future.get(); // 阻塞直到结果返回

需要注意的是，使用get()方法会使当前线程阻塞，如果执行的任务比较耗时，会导致应用程序变慢或者无响应，因此建议在适当的地方使用异步编程方式。

相关问题

CompletableFuture .supplyAsync

这是一个Java中的类，用于异步执行任务，并在任务完成后返回一个结果。它可以用于在后台执行长时间运行的操作，而不会阻止主线程。例如，在读取网络资源或执行计算密集型任务时，可以使用CompletableFuture类，以便应用程序继续响应用户输入。

CompletableFuture.supplyAsync

CompletableFuture.supplyAsync is a method in Java's CompletableFuture class that allows you to create a CompletableFuture with a supplier function. This method is typically used when you want to asynchronously execute a task and obtain its result. The supplier function is responsible for providing the result value.

Here's an example of how to use CompletableFuture.supplyAsync:

CompletableFuture<String> future = CompletableFuture.supplyAsync(() -> {
    // Perform some task to generate a result
    return "Hello, world!";
});

// You can then use the CompletableFuture to perform other actions, such as applying transformations or handling the result

future.thenApply(result -> {
    // Manipulate the result
    return result.toUpperCase();
}).thenAccept(result -> {
    // Consume the manipulated result
    System.out.println(result);
});

In this example, the supplyAsync method is used to asynchronously execute a task that returns the string "Hello, world!". The thenApply method is then used to transform the result to uppercase, and finally, the thenAccept method is used to consume and print the manipulated result.

I hope this answers your question! Let me know if you have any more.