实现比较器的原始布尔类型？ [英] Implement Comparator for primitive boolean type?

问题描述

我需要一些类 implements Comparator ，对于一个类，我想比较原始的 boolean （不是 Boolean ）值。

I need some classes implements Comparator, and for one I want to compare primitive boolean (not Boolean) values.

如果它是 B oolean，我只会返回boolA.compareTo（boolB）; 会返回0，-1或1。但是如何使用基元呢？

IF it was a Boolean, I would just return boolA.compareTo(boolB); which would return 0, -1 or 1. But how can I do this with primitives?

推荐答案

您可以查看 java.lang.Boolean ，因为该类自然是

You can look up how it is implemented for the java.lang.Boolean, since that class, naturally, uses a primitive boolean as well:

public int compareTo(Boolean b) {
    return (b.value == value ? 0 : (value ? 1 : -1));
}

从Java 7开始，您可以简单地使用内置的静态方法 Boolean.compare（a，b） 。

As of Java 7 you can simply use the built-in static method Boolean.compare(a, b).

这篇关于实现比较器的原始布尔类型？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！