java.util.function

Double 
Implementation Of DoubleBinaryOperator in java
Implementation Of DoubleFunction in java
Implementation Of DoubleConsumer in java
Implementation Of DoublePredicate in java
Implementation Of DoubleSupplier in java
Implementation Of DoubleIntToFunction in java
Implementation Of DoubleToLongFunction in java
Implementation Of DoubleUnaryOperator in java

Integer
Implementation Of IntBinaryOperator in java
Implementation Of IntConsumer in java
Implementation Of IntFunction in java
Implementation Of IntPredicate in java
Implementation Of IntUnaryOperator in java

Functions

Implementation Of Function in java
Implementation Of BiFunction in java

Consumers
Implementation Of Consumer in Java
Implementation Of BiConsumer in java

Operators
Implementation Of BinaryOperator in java, show use of apply and andThen functions.
Implementation Of BinaryOperator in java, show use of max and min functions to create max and min binaryoperator

Predicates
Implementation Of BiPredicate in java, show use of test and negate functions
Implementation Of BiPredicate in java, show use of and and or default methods.

Suppliers
Implementation Of BooleanSupplier in Java