Mastering Java: The Ultimate Quiz for 'Thinking in Java'

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Want to excel in Java? Test your knowledge with our ultimate quiz based on 'Thinking in Java'. Engage with multiple-choice questions and in-depth explanations. Boost your understanding and prepare for your exam with confidence.

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Can EnumMap keys be from different enums?

  1. Yes

  2. No

The correct answer is: No

A Java EnumMap is a specialized Map implementation designed specifically to work with enums as keys. When creating an EnumMap, you must specify which enum type will be used as the key. This means that all keys in the EnumMap must come from the same enum type. Therefore, the correct answer is no, EnumMap keys cannot come from different enums.

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