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## Java Collections Cookbooks and Examples
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This module contains articles about Map data structures in Java.
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### Relevant Articles:
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- [Using a Custom Class as a Key in a Java HashMap](https://www.baeldung.com/java-custom-class-map-key)
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2021-11-10 06:41:57 -05:00
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- [Nested HashMaps Examples in Java](https://www.baeldung.com/java-nested-hashmaps)
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