Added in API level 26

java.lang.invoke

Interfaces

MethodHandleInfo A symbolic reference obtained by cracking a direct method handle into its consitutent symbolic parts. 
TypeDescriptor An entity that has a type descriptor. 
TypeDescriptor.OfField<F extends OfField<F>> An entity that has a field type descriptor. 
TypeDescriptor.OfMethod<F extends OfField<F>, M extends OfMethod<F, M>> An entity that has a method type descriptor Method descriptors conforming to JVMS {@jvms 4.3.3} can be described 

Classes

CallSite A CallSite is a holder for a variable MethodHandle, which is called its target. 
ConstantCallSite A ConstantCallSite is a CallSite whose target is permanent, and can never be changed. 
MethodHandle A method handle is a typed, directly executable reference to an underlying method, constructor, field, or similar low-level operation, with optional transformations of arguments or return values. 
MethodHandles This class consists exclusively of static methods that operate on or return method handles. 
MethodHandles.Lookup A lookup object is a factory for creating method handles, when the creation requires access checking. 
MethodType A method type represents the arguments and return type accepted and returned by a method handle, or the arguments and return type passed and expected by a method handle caller. 
MutableCallSite A MutableCallSite is a CallSite whose target variable behaves like an ordinary field. 
VarHandle A VarHandle is a dynamically strongly typed reference to a variable, or to a parametrically-defined family of variables, including static fields, non-static fields, array elements, or components of an off-heap data structure. 
VolatileCallSite A VolatileCallSite is a CallSite whose target acts like a volatile variable. 

Enums

VarHandle.AccessMode The set of access modes that specify how a variable, referenced by a VarHandle, is accessed. 

Exceptions

LambdaConversionException LambdaConversionException 
WrongMethodTypeException Thrown to indicate that code has attempted to call a method handle via the wrong method type.