Important changes in Java ☕ 8 ⇒ 11 (interfaces)

• part 1: Java 8 to 11 interfaces
• part 2: Java 8 to 11 streams

Java 8 features were here for quite some time. To be honest I didn’t even spend much time with previous versions. I’m already from that generation of programmers that started with stream operations right away. Which means that filter, map, reduce is the way to go for me. Not to mention generics, enums and other Java 5 features. From my perspective, it was already there from the beginning. Before jumping into streams we need to understand how those functional things can work...