Uses of Class
java.lang.invoke.MethodType

Packages that use MethodType

Package	Description
java.lang	Provides classes that are fundamental to the design of the Java programming language.
java.lang.constant	Classes and interfaces to represent nominal descriptors for run-time entities such as classes or method handles, and classfile entities such as constant pool entries or invokedynamic call sites.
java.lang.foreign	Provides low-level access to memory and functions outside the Java runtime.
java.lang.invoke	The java.lang.invoke package provides low-level primitives for interacting with the Java Virtual Machine.
java.lang.runtime	The java.lang.runtime package provides low-level runtime support for the Java language.

Uses of MethodType in java.lang

Methods in java.lang that return MethodType

Modifier and Type	Method	Description
default MethodType	StackWalker.StackFrame.getMethodType()	Returns the MethodType representing the parameter types and the return type for the method represented by this stack frame.

Uses of MethodType in java.lang.constant

Methods in java.lang.constant that return MethodType

Modifier and Type	Method	Description
MethodType	MethodTypeDesc.resolveConstantDesc(MethodHandles.Lookup lookup)	Resolves this descriptor reflectively, emulating the resolution behavior of JVMS 5.4.3 and the access control behavior of JVMS 5.4.4.

Uses of MethodType in java.lang.foreign

Methods in java.lang.foreign that return MethodType

Modifier and Type	Method	Description
MethodType	FunctionDescriptor.toMethodType()	Returns the method type consisting of the carrier types of the layouts in this function descriptor.

Uses of MethodType in java.lang.invoke

Classes in java.lang.invoke that implement interfaces with type arguments of type MethodType

Modifier and Type	Class	Description
final class	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.

Methods in java.lang.invoke that return MethodType

Modifier and Type	Method	Description
final MethodType	VarHandle.accessModeType(VarHandle.AccessMode accessMode)	Obtains the access mode type for this VarHandle and a given access mode.
MethodType	MethodType.appendParameterTypes(Class<?>... ptypesToInsert)	Finds or creates a method type with additional parameter types.
MethodType	MethodType.appendParameterTypes(List<Class<?>> ptypesToInsert)	Finds or creates a method type with additional parameter types.
MethodType	MethodType.changeParameterType(int num, Class<?> nptype)	Finds or creates a method type with a single different parameter type.
MethodType	MethodType.changeReturnType(Class<?> nrtype)	Finds or creates a method type with a different return type.
MethodType	MethodType.dropParameterTypes(int start, int end)	Finds or creates a method type with some parameter types omitted.
MethodType	MethodType.erase()	Erases all reference types to Object.
static MethodType	MethodType.fromMethodDescriptorString(String descriptor, ClassLoader loader)	Finds or creates an instance of a method type of the given method descriptor (JVMS 4.3.3).
MethodType	MethodType.generic()	Converts all types, both reference and primitive, to Object.
static MethodType	MethodType.genericMethodType(int objectArgCount)	Finds or creates a method type whose components are all Object.
static MethodType	MethodType.genericMethodType(int objectArgCount, boolean finalArray)	Finds or creates a method type whose components are Object with an optional trailing Object[] array.
MethodType	MethodHandleInfo.getMethodType()	Returns the nominal type of the cracked symbolic reference, expressed as a method type.
MethodType	MethodType.insertParameterTypes(int num, Class<?>... ptypesToInsert)	Finds or creates a method type with additional parameter types.
MethodType	MethodType.insertParameterTypes(int num, List<Class<?>> ptypesToInsert)	Finds or creates a method type with additional parameter types.
static MethodType	MethodType.methodType(Class<?> rtype)	Finds or creates a method type with the given components.
static MethodType	MethodType.methodType(Class<?> rtype, Class<?> ptype0)	Finds or creates a method type with the given components.
static MethodType	MethodType.methodType(Class<?> rtype, Class<?>[] ptypes)	Finds or creates an instance of the given method type.
static MethodType	MethodType.methodType(Class<?> rtype, Class<?> ptype0, Class<?>... ptypes)	Finds or creates a method type with the given components.
static MethodType	MethodType.methodType(Class<?> rtype, MethodType ptypes)	Finds or creates a method type with the given components.
static MethodType	MethodType.methodType(Class<?> rtype, List<Class<?>> ptypes)	Finds or creates a method type with the given components.
MethodType	CallSite.type()	Returns the type of this call site's target.
MethodType	MethodHandle.type()	Reports the type of this method handle.
MethodType	MethodType.unwrap()	Converts all wrapper types to their corresponding primitive types.
MethodType	MethodType.wrap()	Converts all primitive types to their corresponding wrapper types.

Methods in java.lang.invoke with parameters of type MethodType

Modifier and Type	Method	Description
static CallSite	LambdaMetafactory.altMetafactory(MethodHandles.Lookup caller, String interfaceMethodName, MethodType factoryType, Object... args)	Facilitates the creation of simple "function objects" that implement one or more interfaces by delegation to a provided MethodHandle, after appropriate type adaptation and partial evaluation of arguments.
final MethodHandle	MethodHandle.asType(MethodType newType)	Produces an adapter method handle which adapts the type of the current method handle to a new type.
MethodHandle	MethodHandles.Lookup.bind(Object receiver, String name, MethodType type)	Produces an early-bound method handle for a non-static method.
static MethodHandle	MethodHandles.empty(MethodType type)	Produces a method handle of the requested type which ignores any arguments, does nothing, and returns a suitable default depending on the return type.
static MethodHandle	MethodHandles.exactInvoker(MethodType type)	Produces a special invoker method handle which can be used to invoke any method handle of the given type, as if by invokeExact.
static MethodHandle	MethodHandles.explicitCastArguments(MethodHandle target, MethodType newType)	Produces a method handle which adapts the type of the given method handle to a new type by pairwise argument and return type conversion.
MethodHandle	MethodHandles.Lookup.findConstructor(Class<?> refc, MethodType type)	Produces a method handle which creates an object and initializes it, using the constructor of the specified type.
MethodHandle	MethodHandles.Lookup.findSpecial(Class<?> refc, String name, MethodType type, Class<?> specialCaller)	Produces an early-bound method handle for a virtual method.
MethodHandle	MethodHandles.Lookup.findStatic(Class<?> refc, String name, MethodType type)	Produces a method handle for a static method.
MethodHandle	MethodHandles.Lookup.findVirtual(Class<?> refc, String name, MethodType type)	Produces a method handle for a virtual method.
static MethodHandle	MethodHandles.invoker(MethodType type)	Produces a special invoker method handle which can be used to invoke any method handle compatible with the given type, as if by invoke.
static CallSite	StringConcatFactory.makeConcat(MethodHandles.Lookup lookup, String name, MethodType concatType)	Facilitates the creation of optimized String concatenation methods, that can be used to efficiently concatenate a known number of arguments of known types, possibly after type adaptation and partial evaluation of arguments.
static CallSite	StringConcatFactory.makeConcatWithConstants(MethodHandles.Lookup lookup, String name, MethodType concatType, String recipe, Object... constants)	Facilitates the creation of optimized String concatenation methods, that can be used to efficiently concatenate a known number of arguments of known types, possibly after type adaptation and partial evaluation of arguments.
static CallSite	LambdaMetafactory.metafactory(MethodHandles.Lookup caller, String interfaceMethodName, MethodType factoryType, MethodType interfaceMethodType, MethodHandle implementation, MethodType dynamicMethodType)	Facilitates the creation of simple "function objects" that implement one or more interfaces by delegation to a provided MethodHandle, after appropriate type adaptation and partial evaluation of arguments.
static MethodType	MethodType.methodType(Class<?> rtype, MethodType ptypes)	Finds or creates a method type with the given components.
static MethodHandle	MethodHandles.permuteArguments(MethodHandle target, MethodType newType, int... reorder)	Produces a method handle which adapts the calling sequence of the given method handle to a new type, by reordering the arguments.
static MethodHandle	MethodHandles.spreadInvoker(MethodType type, int leadingArgCount)	Produces a method handle which will invoke any method handle of the given type, with a given number of trailing arguments replaced by a single trailing Object[] array.
static String	MethodHandleInfo.toString(int kind, Class<?> defc, String name, MethodType type)	Returns a string representation for a MethodHandleInfo, given the four parts of its symbolic reference.
static MethodHandle	MethodHandles.varHandleExactInvoker(VarHandle.AccessMode accessMode, MethodType type)	Produces a special invoker method handle which can be used to invoke a signature-polymorphic access mode method on any VarHandle whose associated access mode type is compatible with the given type.
static MethodHandle	MethodHandles.varHandleInvoker(VarHandle.AccessMode accessMode, MethodType type)	Produces a special invoker method handle which can be used to invoke a signature-polymorphic access mode method on any VarHandle whose associated access mode type is compatible with the given type.

Constructors in java.lang.invoke with parameters of type MethodType

Modifier	Constructor	Description
protected	ConstantCallSite(MethodType targetType, MethodHandle createTargetHook)	Creates a call site with a permanent target, possibly bound to the call site itself.
	MutableCallSite(MethodType type)	Creates a blank call site object with the given method type.
	VolatileCallSite(MethodType type)	Creates a call site with a volatile binding to its target.

Uses of MethodType in java.lang.runtime

Methods in java.lang.runtime with parameters of type MethodType

Modifier and Type	Method	Description
static CallSite	SwitchBootstraps.enumSwitch(MethodHandles.Lookup lookup, String invocationName, MethodType invocationType, Object... labels)	Bootstrap method for linking an invokedynamic call site that implements a switch on a target of an enum type.
static CallSite	SwitchBootstraps.typeSwitch(MethodHandles.Lookup lookup, String invocationName, MethodType invocationType, Object... labels)	Bootstrap method for linking an invokedynamic call site that implements a switch on a target of a reference type.