java.lang.invoke

A symbolic reference obtained by cracking a direct method handle into its consitutent symbolic parts.

An entity that has a type descriptor.

A CallSite is a holder for a variable MethodHandle, which is called its target.

A ConstantCallSite is a CallSite whose target is permanent, and can never be changed.

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.

This class consists exclusively of static methods that operate on or return method handles.

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.

A MutableCallSite is a CallSite whose target variable behaves like an ordinary field.

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.

A VolatileCallSite is a CallSite whose target acts like a volatile variable.

LambdaConversionException

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