Module java.base

Package java.lang.classfile^PREVIEW

Enum Class TypeKind

java.lang.Object

java.lang.Enum<TypeKind^PREVIEW>

java.lang.classfile.TypeKind

All Implemented Interfaces:

Serializable, Comparable<TypeKindPREVIEW>, Constable

public enum TypeKind
extends Enum<TypeKindPREVIEW>

TypeKind is a preview API of the Java platform.

Programs can only use TypeKind when preview features are enabled.

Preview features may be removed in a future release, or upgraded to permanent features of the Java platform.

Describes the types that can be part of a field or method descriptor.

Since:

22

Nested Class Summary

Nested classes/interfaces declared in class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
BooleanType	the primitive type boolean
ByteType	the primitive type byte
CharType	the primitive type char
DoubleType	the primitive type double
FloatType	the primitive type float
IntType	the primitive type int
LongType	the primitive type long
ReferenceType	a reference type
ShortType	the primitive type short
VoidType	void

Method Summary

Modifier and Type	Method	Description
TypeKindPREVIEW	asLoadable()	Erase this type kind to the type which will be used for xLOAD, xSTORE, and xRETURN bytecodes
String	descriptor()	Returns the field descriptor character corresponding to this type.
static TypeKindPREVIEW	from(TypeDescriptor.OfField<?> descriptor)	Returns the type kind associated with the specified field descriptor.
static TypeKindPREVIEW	fromDescriptor(CharSequence s)	Returns the type kind associated with the specified field descriptor.
static TypeKindPREVIEW	fromNewArrayCode(int newarraycode)	Returns the type kind associated with the array type described by the array code used as an operand to newarray.
int	newarraycode()	Returns the code used by the newarray opcode corresponding to this type.
int	slotSize()	Returns the number of local variable slots consumed by this type.
String	typeName()	Returns the human-readable name corresponding to this type.
static TypeKindPREVIEW	valueOf(String name)	Returns the enum constant of this class with the specified name.
static TypeKindPREVIEW[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods declared in class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods declared in class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

ByteType

public static final TypeKindPREVIEW ByteType

the primitive type byte

ShortType

public static final TypeKindPREVIEW ShortType

the primitive type short

IntType

public static final TypeKindPREVIEW IntType

the primitive type int

FloatType

public static final TypeKindPREVIEW FloatType

the primitive type float

LongType

public static final TypeKindPREVIEW LongType

the primitive type long

DoubleType

public static final TypeKindPREVIEW DoubleType

the primitive type double

ReferenceType

public static final TypeKindPREVIEW ReferenceType

a reference type

CharType

public static final TypeKindPREVIEW CharType

the primitive type char

BooleanType

public static final TypeKindPREVIEW BooleanType

the primitive type boolean

VoidType

public static final TypeKindPREVIEW VoidType

void

Method Details

values

public static TypeKindPREVIEW[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static TypeKindPREVIEW valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

typeName

public String typeName()

Returns the human-readable name corresponding to this type.

Returns:

the human-readable name corresponding to this type

descriptor

public String descriptor()

Returns the field descriptor character corresponding to this type.

Returns:

the field descriptor character corresponding to this type

newarraycode

public int newarraycode()

Returns the code used by the newarray opcode corresponding to this type.

Returns:

the code used by the newarray opcode corresponding to this type

slotSize

public int slotSize()

Returns the number of local variable slots consumed by this type.

Returns:

the number of local variable slots consumed by this type

asLoadable

public TypeKindPREVIEW asLoadable()

Erase this type kind to the type which will be used for xLOAD, xSTORE, and xRETURN bytecodes

Returns:

the erased type kind

fromNewArrayCode

public static TypeKindPREVIEW fromNewArrayCode(int newarraycode)

Returns the type kind associated with the array type described by the array code used as an operand to newarray.

Parameters:

newarraycode - the operand of the newarray instruction

Returns:

the type kind associated with the array type described by the array code used as an operand to newarray

fromDescriptor

public static TypeKindPREVIEW fromDescriptor(CharSequence s)

Returns the type kind associated with the specified field descriptor.

Parameters:

s - the field descriptor

Returns:

the type kind associated with the specified field descriptor

from

public static TypeKindPREVIEW from(TypeDescriptor.OfField<?> descriptor)

Returns the type kind associated with the specified field descriptor.

Parameters:

descriptor - the field descriptor

Returns:

the type kind associated with the specified field descriptor