在Java编程中的实用工具类 [英] Utility Classes in Java Programming

问题描述

我是新来的Java和我提到关于我的问题上了网，但不太满意。我想知道什么是工具类，在Java是？

I am new to Java and I referred regarding my question on the Net but not quite Satisfied. I want to know what the "Utility Class" in Java is?

谁能告诉我举个例子。

谢谢， 大卫

推荐答案

这通常是一个类，只有静态方法（可能带有私有构造函数和抽象标记/决赛中以prevent实例/子类）。它只存在使其他类更容易使用 - 例如，提供了一堆静态方法来处理与字符串值，执行额外的行动，字符串本身不支持。

It's usually a class which only has static methods (possibly with a private constructor and marked abstract/final to prevent instantiation/subclassing). It only exists to make other classes easier to use - for example, providing a bunch of static methods to work with String values, performing extra actions which String itself doesn't support.

工具类一般不上，你可以控制类操作，否则你会通常把行为直接该类中。他们不是非常整齐OO术语，但是仍然可以快乐有益的。

Utility classes generally don't operate on classes you have control over, as otherwise you'd usually put the behaviour directly within that class. They're not terribly neat in OO terms, but can still be jolly useful.

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