# Maps and Sets

Maps store values under unique keys. Sets hold each value only once.

![Cheat sheet: Maps and Sets](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/11/ff6fc14065eb4d5998dfd551216e3f7a.webp)

- Category: Java
- Level: Apprentice
- Tags: java
- Updated: November 3, 2026

Source: https://www.ask-codey.com/cheat-sheets/types-of-collections-maps-cheat-sheet