What is the requirement for an object to be used as key or value in HashMap?

What is the requirement for an object to be used as key or value in HashMap?

题目类型: 技术面试题

这是一道技术面试题，常见于澳洲IT公司面试中。

难度: easy

标签: interviewbit, data-structure, topic-specific, data-structures, algorithms

参考答案摘要

The key or value object that gets used in the hashmap must implement equals() and hashcode() method. The hash code is used when inserting the key object into the map and the equals method is used when...

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