Java 8 is composed with lots of new features. Among them important features are discussed here.
1) Lambda Expressions
2) Method references
3) Stream API
4) Generics/Collections
5) Default Method
6) DateTime API
7) Optional value
8) Compact Profiles
9) Improvements in java.lang and java.util Packages
10)Other tools , JavaDoc API and Security
With these features in Java 8 , java is similar to functional programming languages like python, scala etc.
Java 8 