Java - 使用条件和 Lambda 在数组中查找元素 [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 来获取数组的特定元素.代码应该是这样的:

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"));

但显然这行不通.在 C# 中会类似，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，

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

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

您可以阅读更多关于 Optional 此处.

You can read more about Optional here.

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