如何为 java.util.Arrays.toString 使用静态导入？

Question

考虑以下两个简单的 java 代码片段：

import java.util.Arrays;
class Okay {
    public static void main(String... args) {
        System.out.println(Arrays.toString(new int[0]));
    }
}

这很好用。但是如果我经常使用 toString，我可能会想使用静态导入，像这样：

import static java.util.Arrays.toString;
class DoesNotCompile {
    public static void main(String... args) {
        System.out.println(toString(new int[0]));
    }
}

如果我尝试这样做，Java 认为我正在尝试从 Object 调用 toString()，然后抱怨 toString 没有参数。这看起来很愚蠢：我在一个静态方法中，所以甚至不应该考虑 toString 。（即使是实例方法，我觉得Java这里应该可以得到正确答案。）

有什么办法可以解决这个问题，或者如果该名称已经是 "taken"，静态导入就不起作用了？

Answer 1

不，没有办法解决这个问题。

[来自 JLS 15.12，方法调用表达式] (https://docs.oracle.com/javase/specs/jls/se14/html/jls-15.html#jls-15.12)（更具体地说来自 15.12.1，“确定 Class 或搜索接口”）

If the form is MethodName, that is, just an Identifier, then:

If the Identifier appears in the scope of a method declaration with that name (§6.3, §6.4.1), then:

If there is an enclosing type declaration of which that method is a member, let T be the innermost such type declaration. The class or interface to search is T.

This search policy is called the "comb rule". It effectively looks for methods in a nested class's superclass hierarchy before looking for methods in an enclosing class and its superclass hierarchy. See §6.5.7.1 for an example.

Otherwise, the method declaration may be in scope due to one or more single-static-import or static-import-on-demand declarations. There is no class or interface to search, as the method to be invoked is determined later (§15.12.2.1).

因此，“本地”方法将始终在静态导入之前匹配。

如何为 java.util.Arrays.toString 使用静态导入？

How to use a static import for java.util.Arrays.toString?

java

overloading

compiler-errors

overload-resolution