java - 你能解释一下 Java 中的 "isXxx"方法名吗？

Question

是否在其中一个规范中引用了以“is”开头的方法，而方法名称的后缀是属性名称(类似于 Java bean 的 getter/setter 方法)？

例如:

public boolean isConditionTrue() {
   ...
   ...
}

private boolean conditionTrue;

谢谢!

Answer 1

这是 Java 命名约定，

If the method returns a boolean value, use is or has as the prefix for the method name. For example, use isOverdrawn or hasCreditLeft for methods that return true or false values. Avoid the use of the word not in the boolean method name, use the ! operator instead. For example, use !isOverdrawn instead of isNotOverdrawn.

另见:

• Java Style Guide: Method Naming Convention
• Java Language Specification - Method Names

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根据Java语言规范，

A method that tests a boolean condition V about an object should be named isV. An example is the method isInterrupted of class Thread.