CompletableFuture使用this方法
时间: 2023-11-10 10:02:01 浏览: 60
在使用CompletableFuture时,可以使用this方法来引用当前的CompletableFuture对象。this方法返回一个CompletableFuture对象,可以继续对其进行链式操作。下面是一个示例:
```java
CompletableFuture<Integer> future = CompletableFuture.supplyAsync(() -> 42)
.thenApply(this::multiplyByTwo)
.thenApply(this::addThree);
private int multiplyByTwo(int number) {
return number * 2;
}
private int addThree(int number) {
return number + 3;
}
```
在上面的示例中,通过使用this::multiplyByTwo和this::addThree,可以将当前CompletableFuture对象作为方法的引用,然后对其进行操作。
相关问题
CompletableFuture时,使用this.方法
在使用CompletableFuture时,使用this.方法是指在CompletableFuture的回调方法中调用当前对象的方法。这样做可以方便地在异步任务完成后执行一些操作或者获取异步任务的结果。
例如,我们可以在CompletableFuture的回调方法中使用this.方法来处理异步任务完成后的结果:
```java
public class MyClass {
public void doSomethingAsync() {
CompletableFuture<Void> future = CompletableFuture.runAsync(() -> {
// 异步任务的逻辑
});
future.thenRun(() -> {
// 异步任务完成后的操作
this.someMethod();
});
}
public void someMethod() {
// 处理异步任务完成后的结果
}
}
```
在上面的例子中,doSomethingAsync()方法创建了一个CompletableFuture对象,并在异步任务完成后调用了回调方法thenRun()。在回调方法中,我们可以使用this.方法来调用当前对象的someMethod()方法来处理异步任务的结果。
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:
```java
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.
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