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

Disable ads (and more) with a membership for a one time $2.99 payment

Dive into the depths of Java with our quiz based on "Thinking in Java, Fourth Edition" by Bruce Eckel. Test your knowledge, solidify concepts, and prepare for certification with challenging questions and insightful feedback.

Start Multiple Choice Practice Test
Start Flash Cards

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

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.

More Questions Like This