Java中方法的签名是否包含其返回类型？ [英] Does a method's signature in Java include its return type?

问题描述

Java类/接口中的方法签名是否包含其返回类型？

Does the method signature in a Java class/interface include its return type?

示例：

Java是否知道这两种方法之间的区别：

Does Java know the difference between those two methods:

public class Foo {
    public int  myMethod(int param) {}
    public char myMethod(int param) {}
}

或者是它可能只是重要的方法名称和参数列表？

Or is it maybe only the method name and parameters list that matters?

推荐答案

引自 Oracle Docs ：

定义：方法声明的两个组成部分包括 方法签名 - 方法的名称和参数类型。

Definition: Two of the components of a method declaration comprise the method signature—the method's name and the parameter types.

由于编辑了问题以包含此示例：

Since the question was edited to include this example:

public class Foo {
    public int  myMethod(int param) {}
    public char myMethod(int param) {}
}

不，编译器不会知道差异，因为他们的签名： myMethod（int param）是一样的。第二行：

No, the compiler won't know the difference, as their signature: myMethod(int param) is the same. The second line:

    public char myMethod(int param) {}

会给出错误：方法已经在课程中定义，这进一步证实了上述声明。

will give you can error: method is already defined in class, which further confirms the above statement.

这篇关于Java中方法的签名是否包含其返回类型？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！