org.apache.commons.lang3.function

Provides functional interfaces to complement those in java.lang.function and utilities for working with Java 8 lambdas.

Contains failable functional interfaces that address the fact that lambdas are supposed not to throw Exceptions, at least not checked Exceptions, A.K.A. instances of Exception. A failable functional interface declares a type of Exception that may be raised if the function fails.

Since:

3.11

Interfaces

BooleanConsumer	A functional interface like IntConsumer but for boolean.
ByteConsumer	A functional interface like IntConsumer but for byte.
ByteSupplier	A functional interface like IntSupplier, but for a byte.
FailableBiConsumer	A functional interface like BiConsumer that declares a Throwable.
FailableBiFunction	A functional interface like BiFunction that declares a Throwable.
FailableBiPredicate	A functional interface like BiPredicate that declares a Throwable.
FailableBooleanSupplier	A functional interface like BooleanSupplier that declares a Throwable.
FailableByteConsumer	A functional interface like ByteConsumer that declares a Throwable.
FailableByteSupplier	A functional interface like IntSupplier, but for a byte, that declares a Throwable.
FailableCallable	A functional interface like java.util.concurrent.Callable that declares a Throwable.
FailableConsumer	A functional interface like Consumer that declares a Throwable.
FailableDoubleBinaryOperator	A functional interface like DoubleBinaryOperator that declares a Throwable.
FailableDoubleConsumer	A functional interface like DoubleConsumer that declares a Throwable.
FailableDoubleFunction	A functional interface like DoubleFunction that declares a Throwable.
FailableDoublePredicate	A functional interface like DoublePredicate that declares a Throwable.
FailableDoubleSupplier	A functional interface like DoubleSupplier that declares a Throwable.
FailableDoubleToIntFunction	A functional interface like DoubleToIntFunction that declares a Throwable.
FailableDoubleToLongFunction	A functional interface like DoubleToLongFunction that declares a Throwable.
FailableDoubleUnaryOperator	A functional interface like DoubleUnaryOperator that declares a Throwable.
FailableFunction	A functional interface like Function that declares a Throwable.
FailableIntBinaryOperator	A functional interface like IntBinaryOperator that declares a Throwable.
FailableIntConsumer	A functional interface like IntConsumer that declares a Throwable.
FailableIntFunction	A functional interface like IntFunction that declares a Throwable.
FailableIntPredicate	A functional interface like IntPredicate that declares a Throwable.
FailableIntSupplier	A functional interface like IntSupplier that declares a Throwable.
FailableIntToDoubleFunction	A functional interface like IntToDoubleFunction that declares a Throwable.
FailableIntToFloatFunction	A functional interface like IntToDoubleFunction but for float that declares a Throwable.
FailableIntToLongFunction	A functional interface like IntToLongFunction that declares a Throwable.
FailableIntUnaryOperator	A functional interface like IntUnaryOperator that declares a Throwable.
FailableLongBinaryOperator	A functional interface like LongBinaryOperator that declares a Throwable.
FailableLongConsumer	A functional interface like LongConsumer that declares a Throwable.
FailableLongFunction	A functional interface like LongFunction that declares a Throwable.
FailableLongPredicate	A functional interface like LongPredicate that declares a Throwable.
FailableLongSupplier	A functional interface like LongSupplier that declares a Throwable.
FailableLongToDoubleFunction	A functional interface like LongToDoubleFunction that declares a Throwable.
FailableLongToIntFunction	A functional interface like LongToIntFunction that declares a Throwable.
FailableLongUnaryOperator	A functional interface like LongUnaryOperator that declares a Throwable.
FailableObjDoubleConsumer	A functional interface like ObjDoubleConsumer that declares a Throwable.
FailableObjIntConsumer	A functional interface like ObjIntConsumer that declares a Throwable.
FailableObjLongConsumer	A functional interface like ObjLongConsumer that declares a Throwable.
FailablePredicate	A functional interface like Predicate that declares a Throwable.
FailableRunnable	A functional interface like Runnable that declares a kind of Throwable.
FailableShortSupplier	A functional interface like IntSupplier but for short that declares a Throwable.
FailableSupplier	A functional interface like Supplier that declares a Throwable.
FailableToBooleanFunction	A functional interface like a ToBooleanFunction that declares a Throwable.
FailableToDoubleBiFunction	A functional interface like ToDoubleBiFunction that declares a Throwable.
FailableToDoubleFunction	A functional interface like ToDoubleFunction that declares a Throwable.
FailableToIntBiFunction	A functional interface like ToIntBiFunction that declares a Throwable.
FailableToIntFunction	A functional interface like ToIntFunction that declares a Throwable.
FailableToLongBiFunction	A functional interface like ToLongBiFunction that declares a Throwable.
FailableToLongFunction	A functional interface like ToLongFunction that declares a Throwable.
IntToCharFunction	Represents a function that accepts an int-valued argument and produces a char-valued result.
ToBooleanBiFunction	A function that accepts two arguments and produces a boolean result.
TriConsumer	Represents an operation that accepts three input arguments and returns no result.
TriFunction	Represents a function that accepts three arguments and produces a result.

Classes

Consumers	Provides Consumer instances.
Failable	This class provides utility functions, and classes for working with the java.util.function package, or more generally, with Java 8 lambdas.
Functions	Factory for Function.
MethodInvokers	Converts Method objects to lambdas.
Predicates	Factory for Predicate.
Suppliers	Helps use Supplier.