Java Streams: How to Convert a List Into a Sorted Map
Good for categorizing complex objects.
Java: How to Convert a List to a Map
Same data. Different look.
Java: How to Sort a Map
Get your affairs in order.
Java: How to Get a Map's Value From Its Key
Sometimes you need to do things backwards.
Java: How to Convert Properties to a Map
Because Maps give you more flexibility.
Spring Boot: Create a Map With Case-Insensitive Keys Using LinkedCaseInsensitiveMap
The name of that class gives away the game, no?
Java Streams: How to Filter a Map to Get Just the Data You're Looking For
Because sometimes you don't want everything in a Map.
Java Streams: Combine 2 Streams With concat()
It's easy to combine two Streams.
Spring Boot and Jackson: Serialize Maps Like Top-Level Properties With @JsonAnyGetter
It's a nice hack if you don't want to code a bunch of getters and setters.
Spring Boot and Jackson: Deserialize Unmapped Properties to a Map with @JsonAnySetter
You can add a "catch all" when using Jackson to deserialize JSON objects.