方法是否隐藏了一种多态性?

2022-01-24 00:00:00 polymorphism overriding java

多态是采取多种形式的能力.方法覆盖是运行时多态性.

Polymorphism is the ability to take many forms. Method overriding is runtime polymorphism.

我的问题是:

  1. Java 中有没有类似静态多态的东西?

  1. Is there anything like static polymorphism in Java?

方法隐藏可以被认为是多态的一种形式吗?

Can method hiding be considered a form of polymorphism?

在这个 问题的答案，据说静态方法不是多态的.这是什么原因?

In this question's answer, it is said that static methods are not polymorphic. What is the reason for that?

推荐答案

如果我们运行这个测试

class A {
    static void x() {
        System.out.println("A");
    }
}

class B extends A {
    static void x() {
        System.out.println("B");
    }
}

class Test {
    public static void main(String[] args) throws Exception {
        A a = new B();
        a.x();
    }
}

它将打印 A.如果方法 x() 是多态的，它将打印 B.

it will print A. If method x() were polymorphic, it would print B.

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