Module java.base

Package java.lang.constant

Class ConstantDescs

java.lang.Object

java.lang.constant.ConstantDescs

public final class ConstantDescs
extends Object

Predefined values of nominal descriptor for common constants, including descriptors for primitive class types and other common platform types, and descriptors for method handles for standard bootstrap methods.

Since:

12

See Also:

• ConstantDesc

Field Summary

Fields

Modifier and Type	Field	Description
static final DirectMethodHandleDesc	BSM_CLASS_DATA	MethodHandleDesc representing MethodHandles.classData
static final DirectMethodHandleDesc	BSM_CLASS_DATA_AT	MethodHandleDesc representing MethodHandles.classDataAt
static final DirectMethodHandleDesc	BSM_ENUM_CONSTANT	MethodHandleDesc representing ConstantBootstraps.enumConstant
static final DirectMethodHandleDesc	BSM_EXPLICIT_CAST	MethodHandleDesc representing ConstantBootstraps.explicitCast
static final DirectMethodHandleDesc	BSM_GET_STATIC_FINAL	MethodHandleDesc representing ConstantBootstraps.getStaticFinal
static final DirectMethodHandleDesc	BSM_INVOKE	MethodHandleDesc representing ConstantBootstraps.invoke
static final DirectMethodHandleDesc	BSM_NULL_CONSTANT	MethodHandleDesc representing ConstantBootstraps.nullConstant
static final DirectMethodHandleDesc	BSM_PRIMITIVE_CLASS	MethodHandleDesc representing ConstantBootstraps.primitiveClass
static final DirectMethodHandleDesc	BSM_VARHANDLE_ARRAY	MethodHandleDesc representing ConstantBootstraps.arrayVarHandle
static final DirectMethodHandleDesc	BSM_VARHANDLE_FIELD	MethodHandleDesc representing ConstantBootstraps.fieldVarHandle
static final DirectMethodHandleDesc	BSM_VARHANDLE_STATIC_FIELD	MethodHandleDesc representing ConstantBootstraps.staticFieldVarHandle
static final ClassDesc	CD_boolean	ClassDesc representing the primitive type boolean
static final ClassDesc	CD_Boolean	ClassDesc representing Boolean
static final ClassDesc	CD_byte	ClassDesc representing the primitive type byte
static final ClassDesc	CD_Byte	ClassDesc representing Byte
static final ClassDesc	CD_CallSite	ClassDesc representing CallSite
static final ClassDesc	CD_char	ClassDesc representing the primitive type char
static final ClassDesc	CD_Character	ClassDesc representing Character
static final ClassDesc	CD_Class	ClassDesc representing Class
static final ClassDesc	CD_ClassDesc	ClassDesc representing ClassDesc
static final ClassDesc	CD_Collection	ClassDesc representing Collection
static final ClassDesc	CD_ConstantBootstraps	ClassDesc representing ConstantBootstraps
static final ClassDesc	CD_ConstantDesc	ClassDesc representing ConstantDesc
static final ClassDesc	CD_DirectMethodHandleDesc	ClassDesc representing DirectMethodHandleDesc
static final ClassDesc	CD_double	ClassDesc representing the primitive type double
static final ClassDesc	CD_Double	ClassDesc representing Double
static final ClassDesc	CD_DynamicCallSiteDesc	ClassDesc representing DynamicCallSiteDesc
static final ClassDesc	CD_DynamicConstantDesc	ClassDesc representing DynamicConstantDesc
static final ClassDesc	CD_Enum	ClassDesc representing Enum
static final ClassDesc	CD_EnumDesc	ClassDesc representing Enum.EnumDesc
static final ClassDesc	CD_Exception	ClassDesc representing Exception
static final ClassDesc	CD_float	ClassDesc representing the primitive type float
static final ClassDesc	CD_Float	ClassDesc representing Float
static final ClassDesc	CD_int	ClassDesc representing the primitive type int
static final ClassDesc	CD_Integer	ClassDesc representing Integer
static final ClassDesc	CD_List	ClassDesc representing List
static final ClassDesc	CD_long	ClassDesc representing the primitive type long
static final ClassDesc	CD_Long	ClassDesc representing Long
static final ClassDesc	CD_Map	ClassDesc representing Map
static final ClassDesc	CD_MethodHandle	ClassDesc representing MethodHandle
static final ClassDesc	CD_MethodHandleDesc	ClassDesc representing MethodHandleDesc
static final ClassDesc	CD_MethodHandleDesc_Kind	ClassDesc representing DirectMethodHandleDesc.Kind
static final ClassDesc	CD_MethodHandles	ClassDesc representing MethodHandles
static final ClassDesc	CD_MethodHandles_Lookup	ClassDesc representing MethodHandles.Lookup
static final ClassDesc	CD_MethodType	ClassDesc representing MethodType
static final ClassDesc	CD_MethodTypeDesc	ClassDesc representing MethodTypeDesc
static final ClassDesc	CD_Number	ClassDesc representing Number
static final ClassDesc	CD_Object	ClassDesc representing Object
static final ClassDesc	CD_Set	ClassDesc representing Set
static final ClassDesc	CD_short	ClassDesc representing the primitive type short
static final ClassDesc	CD_Short	ClassDesc representing Short
static final ClassDesc	CD_String	ClassDesc representing String
static final ClassDesc	CD_Throwable	ClassDesc representing Throwable
static final ClassDesc	CD_VarHandle	ClassDesc representing VarHandle
static final ClassDesc	CD_VarHandleDesc	ClassDesc representing VarHandle.VarHandleDesc
static final ClassDesc	CD_void	ClassDesc representing the primitive type void
static final ClassDesc	CD_Void	ClassDesc representing Void
static final String	CLASS_INIT_NAME	The special name of class initialization methods, "<clinit>".
static final String	DEFAULT_NAME	Invocation name to use when no name is needed, such as the name of a constructor, or the invocation name of a dynamic constant or dynamic callsite when the bootstrap is known to ignore the invocation name.
static final DynamicConstantDesc<Boolean>	FALSE	Nominal descriptor representing the constant Boolean.FALSE
static final String	INIT_NAME	The special name of instance initialization methods, "<init>".
static final MethodTypeDesc	MTD_void	Nominal descriptor representing the method descriptor ()V, taking no argument and returning void.
static final ConstantDesc	NULL	Nominal descriptor representing the constant null
static final DynamicConstantDesc<Boolean>	TRUE	Nominal descriptor representing the constant Boolean.TRUE

Method Summary

Modifier and Type	Method	Description
static DirectMethodHandleDesc	ofCallsiteBootstrap(ClassDesc owner, String name, ClassDesc returnType, ClassDesc... paramTypes)	Returns a MethodHandleDesc corresponding to a bootstrap method for an invokedynamic callsite, which is a static method whose leading parameter types are Lookup, String, and MethodType.
static DirectMethodHandleDesc	ofConstantBootstrap(ClassDesc owner, String name, ClassDesc returnType, ClassDesc... paramTypes)	Returns a MethodHandleDesc corresponding to a bootstrap method for a dynamic constant, which is a static method whose leading arguments are Lookup, String, and Class.

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

DEFAULT_NAME

public static final String DEFAULT_NAME

Invocation name to use when no name is needed, such as the name of a constructor, or the invocation name of a dynamic constant or dynamic callsite when the bootstrap is known to ignore the invocation name.

See Also:

• Constant Field Values

CD_Object

public static final ClassDesc CD_Object

ClassDesc representing Object

CD_String

public static final ClassDesc CD_String

ClassDesc representing String

CD_Class

public static final ClassDesc CD_Class

ClassDesc representing Class

CD_Number

public static final ClassDesc CD_Number

ClassDesc representing Number

CD_Integer

public static final ClassDesc CD_Integer

ClassDesc representing Integer

CD_Long

public static final ClassDesc CD_Long

ClassDesc representing Long

CD_Float

public static final ClassDesc CD_Float

ClassDesc representing Float

CD_Double

public static final ClassDesc CD_Double

ClassDesc representing Double

CD_Short

public static final ClassDesc CD_Short

ClassDesc representing Short

CD_Byte

public static final ClassDesc CD_Byte

ClassDesc representing Byte

CD_Character

public static final ClassDesc CD_Character

ClassDesc representing Character

CD_Boolean

public static final ClassDesc CD_Boolean

ClassDesc representing Boolean

CD_Void

public static final ClassDesc CD_Void

ClassDesc representing Void

CD_Throwable

public static final ClassDesc CD_Throwable

ClassDesc representing Throwable

CD_Exception

public static final ClassDesc CD_Exception

ClassDesc representing Exception

CD_Enum

public static final ClassDesc CD_Enum

ClassDesc representing Enum

CD_VarHandle

public static final ClassDesc CD_VarHandle

ClassDesc representing VarHandle

CD_MethodHandles

public static final ClassDesc CD_MethodHandles

ClassDesc representing MethodHandles

CD_MethodHandles_Lookup

public static final ClassDesc CD_MethodHandles_Lookup

ClassDesc representing MethodHandles.Lookup

CD_MethodHandle

public static final ClassDesc CD_MethodHandle

ClassDesc representing MethodHandle

CD_MethodType

public static final ClassDesc CD_MethodType

ClassDesc representing MethodType

CD_CallSite

public static final ClassDesc CD_CallSite

ClassDesc representing CallSite

CD_Collection

public static final ClassDesc CD_Collection

ClassDesc representing Collection

CD_List

public static final ClassDesc CD_List

ClassDesc representing List

CD_Set

public static final ClassDesc CD_Set

ClassDesc representing Set

CD_Map

public static final ClassDesc CD_Map

ClassDesc representing Map

CD_ConstantDesc

public static final ClassDesc CD_ConstantDesc

ClassDesc representing ConstantDesc

CD_ClassDesc

public static final ClassDesc CD_ClassDesc

ClassDesc representing ClassDesc

CD_EnumDesc

public static final ClassDesc CD_EnumDesc

ClassDesc representing Enum.EnumDesc

CD_MethodTypeDesc

public static final ClassDesc CD_MethodTypeDesc

ClassDesc representing MethodTypeDesc

CD_MethodHandleDesc

public static final ClassDesc CD_MethodHandleDesc

ClassDesc representing MethodHandleDesc

CD_DirectMethodHandleDesc

public static final ClassDesc CD_DirectMethodHandleDesc

ClassDesc representing DirectMethodHandleDesc

CD_VarHandleDesc

public static final ClassDesc CD_VarHandleDesc

ClassDesc representing VarHandle.VarHandleDesc

CD_MethodHandleDesc_Kind

public static final ClassDesc CD_MethodHandleDesc_Kind

ClassDesc representing DirectMethodHandleDesc.Kind

CD_DynamicConstantDesc

public static final ClassDesc CD_DynamicConstantDesc

ClassDesc representing DynamicConstantDesc

CD_DynamicCallSiteDesc

public static final ClassDesc CD_DynamicCallSiteDesc

ClassDesc representing DynamicCallSiteDesc

CD_ConstantBootstraps

public static final ClassDesc CD_ConstantBootstraps

ClassDesc representing ConstantBootstraps

BSM_PRIMITIVE_CLASS

public static final DirectMethodHandleDesc BSM_PRIMITIVE_CLASS

MethodHandleDesc representing ConstantBootstraps.primitiveClass

BSM_ENUM_CONSTANT

public static final DirectMethodHandleDesc BSM_ENUM_CONSTANT

MethodHandleDesc representing ConstantBootstraps.enumConstant

BSM_GET_STATIC_FINAL

public static final DirectMethodHandleDesc BSM_GET_STATIC_FINAL

MethodHandleDesc representing ConstantBootstraps.getStaticFinal

Since:

15

BSM_NULL_CONSTANT

public static final DirectMethodHandleDesc BSM_NULL_CONSTANT

MethodHandleDesc representing ConstantBootstraps.nullConstant

BSM_VARHANDLE_FIELD

public static final DirectMethodHandleDesc BSM_VARHANDLE_FIELD

MethodHandleDesc representing ConstantBootstraps.fieldVarHandle

BSM_VARHANDLE_STATIC_FIELD

public static final DirectMethodHandleDesc BSM_VARHANDLE_STATIC_FIELD

MethodHandleDesc representing ConstantBootstraps.staticFieldVarHandle

BSM_VARHANDLE_ARRAY

public static final DirectMethodHandleDesc BSM_VARHANDLE_ARRAY

MethodHandleDesc representing ConstantBootstraps.arrayVarHandle

BSM_INVOKE

public static final DirectMethodHandleDesc BSM_INVOKE

MethodHandleDesc representing ConstantBootstraps.invoke

BSM_EXPLICIT_CAST

public static final DirectMethodHandleDesc BSM_EXPLICIT_CAST

MethodHandleDesc representing ConstantBootstraps.explicitCast

Since:

15

CD_int

public static final ClassDesc CD_int

ClassDesc representing the primitive type int

CD_long

public static final ClassDesc CD_long

ClassDesc representing the primitive type long

CD_float

public static final ClassDesc CD_float

ClassDesc representing the primitive type float

CD_double

public static final ClassDesc CD_double

ClassDesc representing the primitive type double

CD_short

public static final ClassDesc CD_short

ClassDesc representing the primitive type short

CD_byte

public static final ClassDesc CD_byte

ClassDesc representing the primitive type byte

CD_char

public static final ClassDesc CD_char

ClassDesc representing the primitive type char

CD_boolean

public static final ClassDesc CD_boolean

ClassDesc representing the primitive type boolean

CD_void

public static final ClassDesc CD_void

ClassDesc representing the primitive type void

BSM_CLASS_DATA

public static final DirectMethodHandleDesc BSM_CLASS_DATA

MethodHandleDesc representing MethodHandles.classData

Since:

21

BSM_CLASS_DATA_AT

public static final DirectMethodHandleDesc BSM_CLASS_DATA_AT

MethodHandleDesc representing MethodHandles.classDataAt

Since:

21

NULL

public static final ConstantDesc NULL

Nominal descriptor representing the constant null

TRUE

public static final DynamicConstantDesc<Boolean> TRUE

Nominal descriptor representing the constant Boolean.TRUE

Since:

15

FALSE

public static final DynamicConstantDesc<Boolean> FALSE

Nominal descriptor representing the constant Boolean.FALSE

Since:

15

INIT_NAME

public static final String INIT_NAME

The special name of instance initialization methods, "<init>". An instance initialization method has this special name and is void.

See Java Virtual Machine Specification:

2.9.1 Instance Initialization Methods

Since:

21

See Also:

• Constant Field Values

CLASS_INIT_NAME

public static final String CLASS_INIT_NAME

The special name of class initialization methods, "<clinit>". A class initialization method has this special name, ACC_STATIC flag set, is void and takes no arguments.

See Java Virtual Machine Specification:

2.9.2 Class Initialization Methods

Since:

21

See Also:

• Constant Field Values

MTD_void

public static final MethodTypeDesc MTD_void

Nominal descriptor representing the method descriptor ()V, taking no argument and returning void.

Since:

21

Method Details

ofCallsiteBootstrap

public static DirectMethodHandleDesc ofCallsiteBootstrap(ClassDesc owner,
 String name,
 ClassDesc returnType,
 ClassDesc... paramTypes)

Returns a MethodHandleDesc corresponding to a bootstrap method for an invokedynamic callsite, which is a static method whose leading parameter types are Lookup, String, and MethodType.

Parameters:

owner - the class declaring the method

name - the unqualified name of the method

returnType - the return type of the method

paramTypes - the types of the static bootstrap arguments, if any

Returns:

the MethodHandleDesc

Throws:

NullPointerException - if any of the arguments are null

See Java Virtual Machine Specification:

4.2.2 Unqualified Names

ofConstantBootstrap

public static DirectMethodHandleDesc ofConstantBootstrap(ClassDesc owner,
 String name,
 ClassDesc returnType,
 ClassDesc... paramTypes)

Returns a MethodHandleDesc corresponding to a bootstrap method for a dynamic constant, which is a static method whose leading arguments are Lookup, String, and Class.

Parameters:

owner - the class declaring the method

name - the unqualified name of the method

returnType - the return type of the method

paramTypes - the types of the static bootstrap arguments, if any

Returns:

the MethodHandleDesc

Throws:

NullPointerException - if any of the arguments are null

See Java Virtual Machine Specification:

4.2.2 Unqualified Names