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以下关于equals方法和hashCode方法描述错误的是 #71

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waylau opened this issue Jul 4, 2020 · 0 comments
Open

以下关于equals方法和hashCode方法描述错误的是 #71

waylau opened this issue Jul 4, 2020 · 0 comments

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@waylau
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waylau commented Jul 4, 2020

以下关于equals方法和hashCode方法描述错误的是(2分)

A. 同一次运行中，同一个对象如果equals方法中用到的信息没有改变，多次调用hashCode方法返回值必须相同
B. 如果两个对象调用equals方法时相等，则这两个对象的hashCode方法，也必须返回相同的值
C. “覆写equals方法时，应同时覆写hashCode方法”的好处是为了提升查询效率
D. 如果两个对象调用equals方法时不相等，则这两个对象的hashCode方法，不要求其返回值不同

你的回答D 是错误的
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