Lambda expressions and method references could be used more frequently.

[jens-kaiser]

The code still contains concepts that were used long before Java 8 in many places. Some of these can or should now be replaced by other constructs.

Anonymous classes are used in many places where lambda expressions and method references would improve readability.

[carlosame]

Anonymous classes are used in many places where lambda expressions and method references would improve readability.

An anonymous class implementing an interface implies more boilerplate code but is often more semantic. I'd rather discuss about specific changes than talking in general.