Java 中方法的签名是否包括其返回类型? [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 知道这两种方法的区别吗:

Does Java know the difference between those two methods:

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

或者只是方法名称和参数列表很重要?

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

推荐答案

引用自 Oracle 文档:

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，编译器不会知道区别，因为它们的签名:myMethod(int param) 是相同的.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) {}

会给你错误:方法已经在类中定义，进一步证实了上面的说法.

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

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