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重载和重写的区别
2022-07-06 09:20:00 【快醒醒鸭今天你编程了吗?】
首先,这道题面试常问,但是两个之间毫无任何关系
重载:
发生在同一个类当中,方法名必须相同,参考类型不同,个数不同,顺序不同,方法返回值和修饰可以不同,发生在编译时。
重写:
发生在父子类中,方法名,参数列表可以不同,返回值范围小于等于父类,子类不可以抛出比父类更多的异常,子类访问修饰符范围大于等于父类;如果父类方法访问修饰符为private,则子类就不能重写该方法
以下这种情况也是错误的,会报错:
//以下编译会报错
public int add(int a,int b)
public String add(int a,int b)
以上就是我对重写和重载区别的认识,要是有些小伙伴有更好的理解,可以评论区留言!!!
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