Java 8 workshop

Useful links, small snippets, notes etc. should be gathered in this file.

• http://www.oracle.com/technetwork/java/javase/8-whats-new-2157071.html

Functional Programming (General) (Ondra)

• immutability
• final arguments
• no side effects
• SRP
• function reference (functional interfaces - consumer, ...)

Java 8 general (Ondra)

• java.util.DateTime
• default methods (traits)
• forEach side effects
• misusage
• broken JavaDoc because of "improvements"
• paths to files ('/' at the beginning of path)

Functional Interface (Ondra)

Lambda Expression (Ondra)

Optional (Ondra)

Stream API (Novoty)

• maximum example
• joining
• filtering
• map
• flat map
• stream of streams (Stream.concat )
• collector

Intelligent Repository (Novoty)

2 examples of map-based repositories:

• classic with lists and getters returning null
• functional with
  • mapping function for adding
  • get returning optional
  • lambda filters

Spliterator? (Novoty)