为什么我不能修改该类中某个类的引用 [英] why I can't modify the reference of a class in that class

问题描述

public class A{
    void set(A k){
        k = null;
    }
}


        A a = new A();
        A b = new A();
        System.out.println(a);
        System.out.println(b);
        a.set(b);
        System.out.println(b);



The outputs:
business.CharacterCard$A@61de33
business.CharacterCard$A@14318bb
business.CharacterCard$A@14318bb

推荐答案

A @ 61de33 business.CharacterCard

A@61de33 business.CharacterCard

A @ 14318bb business.CharacterCard

A@14318bb business.CharacterCard

A @ 14318bb

A@14318bb

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