Java - 使用Condition和Lambda在Array中查找元素 [英] Java - Find Element in Array using Condition and Lambda

问题描述

简而言之，我有这段代码，我想使用条件和lambda获取数组的特定元素。代码如下：

In short, I have this code, and I'd like to get an specific element of the array using a condition and lambda. The code would be something like this:

Preset[] presets = presetDALC.getList();
Preset preset = Arrays.stream(presets).select(x -> x.getName().equals("MyString"));

但显然这不起作用。在C＃中会有类似的东西，但在Java中，我该怎么做？

But obviously this does not work. In C# would be something similar but in Java, how do I do this?

推荐答案

你可以这样做， p>

You can do it like this,

Optional<Present> optional = Arrays.stream(presents)
                                   .filter(x -> "MyString".equals(x.getName()))
                                   .findFirst();

if(optional.isPresent()) {//Check whether optional has element you are looking for
    Present p = optional.get();//get it from optional
}

您可以阅读更多关于可选 此处。

You can read more about Optional here.

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