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.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.
jdk.dynalink	Contains interfaces and classes that are used to link an invokedynamic call site.
jdk.dynalink.linker	Contains interfaces and classes needed by language runtimes to implement their own language-specific object models and type conversions.
jdk.dynalink.linker.support	Contains classes that make it more convenient for language runtimes to implement their own language-specific object models and type conversions by providing basic implementations of some classes as well as various utilities.
jdk.incubator.foreign	Classes to support low-level and efficient foreign memory/function access, directly from Java.

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.invoke

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, given the spelling of its bytecode descriptor.
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.
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.

Uses of MethodType in jdk.dynalink

Methods in jdk.dynalink that return MethodType

Modifier and Type	Method	Description
final MethodType	CallSiteDescriptor.getMethodType()	The type of the method at the call site.

Methods in jdk.dynalink with parameters of type MethodType

Modifier and Type	Method	Description
final CallSiteDescriptor	CallSiteDescriptor.changeMethodType(MethodType newMethodType)	Finds or creates a call site descriptor that only differs in its method type from this descriptor.
protected CallSiteDescriptor	CallSiteDescriptor.changeMethodTypeInternal(MethodType newMethodType)	Finds or creates a call site descriptor that only differs in its method type from this descriptor.

Constructors in jdk.dynalink with parameters of type MethodType

Modifier	Constructor	Description
	CallSiteDescriptor(MethodHandles.Lookup lookup, Operation operation, MethodType methodType)	Creates a new call site descriptor.

Uses of MethodType in jdk.dynalink.linker

Methods in jdk.dynalink.linker with parameters of type MethodType

Modifier and Type	Method	Description
GuardedInvocation	GuardedInvocation.asType(MethodType newType)	Changes the type of the invocation, as if MethodHandle.asType(MethodType) was applied to its invocation and its guard, if it has one (with return type changed to boolean, and parameter count potentially truncated for the guard).
GuardedInvocation	GuardedInvocation.asType(LinkerServices linkerServices, MethodType newType)	Changes the type of the invocation, as if LinkerServices.asType(MethodHandle, MethodType) was applied to its invocation and its guard, if it has one (with return type changed to boolean, and parameter count potentially truncated for the guard).
MethodHandle	LinkerServices.asType(MethodHandle handle, MethodType fromType)	Similar to MethodHandle.asType(MethodType) except it also hooks in method handles produced by all available GuardingTypeConverterFactory implementations, providing for language-specific type coercing of parameters.
MethodHandle	MethodTypeConversionStrategy.asType(MethodHandle target, MethodType newType)	Converts a method handle to a new type.
default MethodHandle	LinkerServices.asTypeLosslessReturn(MethodHandle handle, MethodType fromType)	Similar to LinkerServices.asType(MethodHandle, MethodType) except it treats return value type conversion specially.
GuardedInvocation	GuardedInvocation.asTypeSafeReturn(LinkerServices linkerServices, MethodType newType)	Changes the type of the invocation, as if LinkerServices.asTypeLosslessReturn(MethodHandle, MethodType) was applied to its invocation and LinkerServices.asType(MethodHandle, MethodType) applied to its guard, if it has one (with return type changed to boolean, and parameter count potentially truncated for the guard).

Uses of MethodType in jdk.dynalink.linker.support

Methods in jdk.dynalink.linker.support with parameters of type MethodType

Modifier and Type	Method	Description
static MethodHandle	Guards.asType(MethodHandle test, MethodType type)	Takes a method handle intended to be used as a guard, and adapts it to the requested type, but returning a boolean.
static MethodHandle	Guards.asType(LinkerServices linkerServices, MethodHandle test, MethodType type)	Takes a method handle intended to be used as a guard, and adapts it to the requested type, but returning a boolean.
MethodHandle	Lookup.findSpecial(Class<?> declaringClass, String name, MethodType type)	Performs a MethodHandles.Lookup.findSpecial(Class, String, MethodType, Class) on the underlying lookup.
MethodHandle	Lookup.findStatic(Class<?> declaringClass, String name, MethodType type)	Performs a MethodHandles.Lookup.findStatic(Class, String, MethodType) on the underlying lookup.
MethodHandle	Lookup.findVirtual(Class<?> declaringClass, String name, MethodType type)	Performs a MethodHandles.Lookup.findVirtual(Class, String, MethodType) on the underlying lookup.
static MethodHandle	Guards.isArray(int pos, MethodType type)	Creates a method handle that returns true if the argument in the specified position is a Java array.
static MethodHandle	Guards.isInstance(Class<?> clazz, int pos, MethodType type)	Creates a method handle with arguments of a specified type, but with boolean return value.
static MethodHandle	Guards.isInstance(Class<?> clazz, MethodType type)	Creates a method handle with arguments of a specified type, but with boolean return value.
static MethodHandle	Guards.isOfClass(Class<?> clazz, MethodType type)	Creates a guard method handle with arguments of a specified type, but with boolean return value.

Uses of MethodType in jdk.incubator.foreign

Methods in jdk.incubator.foreign with parameters of type MethodType

Modifier and Type	Method	Description
MethodHandle	CLinker.downcallHandle(MethodType type, FunctionDescriptor function)	Obtains a foreign method handle, with the given type and featuring the given function descriptor, which can be used to call a target foreign function at an address.
MethodHandle	CLinker.downcallHandle(Addressable symbol, MethodType type, FunctionDescriptor function)	Obtains a foreign method handle, with the given type and featuring the given function descriptor, which can be used to call a target foreign function at the given address.
MethodHandle	CLinker.downcallHandle(Addressable symbol, SegmentAllocator allocator, MethodType type, FunctionDescriptor function)	Obtain a foreign method handle, with the given type and featuring the given function descriptor, which can be used to call a target foreign function at the given address.