A programmer is developing a class Key， that will be used as a key in a standard java.util.HashMap. Which two methods should be overridden to assure that Key works correctly as a key？（） -题库考试答案搜索网

A programmer is developing a class Key， that will be used as a key in a standard java.util.HashMap. Which two methods should be overridden to assure that Key works correctly as a key？（）

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2022-05-08 05:24

A、 public int hashCode（）
B、 public void hashCode（）
C、 public int compareTo（Object o）
D、 public boolean equals（Object o）
E、 public boolean compareTo（Key k）

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正确答案

A | D

试题解析

标签： Java认证考试 SCJP程序员认证考试

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