Java 8 Elvis运算符中的空检查？ [英] Null check in Java 8 Elvis operator?

问题描述

问题：是否有针对任何未来Java版本安排的 Elvis运算符的实现？或者是否有任何图书馆将其带入Java？

Question: Is there an implementation of the Elvis operator scheduled for any future Java release? Or is there any Library that brings it to Java?

我已阅读

<它是针对Java SE 7提出的，但没有进入该版本

it was proposed for Java SE 7 but didn't make it into that release

http://www.oracle.com/technetwork/articles/java/java8-optional-2175753.html

我知道Java 8允许这个

I know Java 8 allows this

String name = computer.flatMap(Computer::getSoundcard)
                          .flatMap(Soundcard::getUSB)
                          .map(USB::getVersion)
                          .orElse("UNKNOWN");

但我觉得这有点太多了。因此，如果有人能指出任何将Groovy喜欢/ C＃类似语法的项目/库用于Null Checks的Java，我将不胜感激。

but I it's s bit too much for my taste. SO if anyone could point me out any project / library that would bring the Groovy like/C# like syntax to Java for Null Checks, would be greatly appreciated.

编辑：通过Elvis运算符我的意思是：

By Elvis operator I mean this:

String version = computer?.getSoundcard()?.getUSB()?.getVersion();

或类似的

推荐答案

没有。目前或将来没有计划重新考虑Java中的空值安全运算符。

No. There are no current or future plans to reconsider the null-safe operators in Java.

这篇关于Java 8 Elvis运算符中的空检查？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！