java 8 tips

Here is an article about Java 8 top tips.

Java SE 8 Optional, a pragmatic approach

1. Do not declare any instance variable of type Optional.
2. Use null to indicate optional data within the private scope of a class.
3. Use Optional for getters that access the optional field.
4. Do not use Optional in setters or constructors.
5. Use Optional as a return type for any other business logic methods that have an optional result.