## Java Collections Cookbooks and Examples

This module contains articles about Map data structures in Java.

### Relevant Articles: 
- [Using a Custom Class as a Key in a Java HashMap](https://www.baeldung.com/java-custom-class-map-key)
- [Nested HashMaps Examples in Java](https://www.baeldung.com/java-nested-hashmaps)
- [Java HashMap With Different Value Types](https://www.baeldung.com/java-hashmap-different-value-types)
- [Difference Between Map and HashMap in Java](https://www.baeldung.com/java-map-vs-hashmap)
- [How to Create a New Entry in a Map](https://www.baeldung.com/java-map-new-entry)