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Exception-friendly functional interfaces named by the number of arguments: Function0, Function1, Function2....
All of these have an applyEx() method that that throws an Exception and returns a result.
Implementers should override the applyEx() method (this happens automatically when you use Java 8's lambda syntax).
Each interface also has a default apply() method for consumers of this function to call.
It re-throws all exceptions after wrapping any checked ones in unchecked RuntimeExceptions.
For simplicity, there are no primitive versions of these functions, no "void" return types, and no special-purpose funny names.
If you don't want to return a result, declare the return type as ? and return null.
Comparing just the Consumer interfaces from { @link java.util.function}:
java.util.function org.organicdesign.fp.function Consumer<T> Function1<T,?> DoubleConsumer Function1<Double,?> IntConsumer Function1<Integer,?> LongConsumer Function1<Long,?> BiConsumer<T,U> Function2<T,U,?> ObjDoubleConsumer<T> Function2<T,Double,?> ObjIntConsumer<T> Function2<T,Integer,?> ObjLongConsumer<T> Function2<T,Long,?>