map() vs flatMap() in Java 8

Описание: Confused between map and flatMap in Java 8 Streams? 🤔
Here’s the difference — made super simple!

map → Used to transform elements of a stream using a function.
👉 Example: Multiply all numbers in a list by 3.

flatMap → Used to flatten nested structures like List of Lists into a single stream.
👉 Example: Extract the first character of each string from a list of lists.

✅ map = one to one mapping
✅ flatMap = one to many transformation

Java 8 Streams made easy for every developer! 💻

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