Java中super关键字的范围和用法 [英] Scope and use of super keyword in Java

问题描述

为什么我不能使用super关键字访问父类变量？

Why can't I access the parent class variable with the super keyword?

使用以下代码，输出为：

With the below code, the output is:

feline cougar c c   

class Feline {
    public String type = "f ";

    public Feline() {
        System.out.print("feline ");
    }
}

public class Cougar extends Feline {
    public Cougar() {
        System.out.print("cougar ");

    }

    void go() {
        type = "c ";
        System.out.print(this.type + super.type);
    }

    public static void main(String[] args) {
        new Cougar().go();
    }
}

推荐答案

回答原问题很简单：只有一个变量叫做类型。它的初始值被c覆盖。请记住，只有一个对象，所以一个变量。 Prashant的代码创建了第二个变量，显然不会覆盖父类中的原始字符串。

The answer to the original question is simple: There is only one variable called type. Its initial value gets overwritten by c. Remember that there is only one object, so one variable. Prashant's code creates a second variable and obviously that one doesn't overwrite the original string in the parent class.

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