Module java.base

Package java.lang.classfile.instruction^PREVIEW

Interface FieldInstruction

All Superinterfaces:

ClassFileElementPREVIEW, CodeElementPREVIEW, InstructionPREVIEW

public sealed interface FieldInstruction
extends InstructionPREVIEW

FieldInstruction is a preview API of the Java platform.

Programs can only use FieldInstruction when preview features are enabled.

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

Models a field access instruction in the code array of a Code attribute. Corresponding opcodes will have a kind of Opcode.Kind.FIELD_ACCESS^PREVIEW. Delivered as a CodeElement^PREVIEW when traversing the elements of a CodeModel^PREVIEW.

Since:

22

Method Summary

Modifier and Type	Method	Description
FieldRefEntryPREVIEW	field()	Returns the FieldRefEntryPREVIEW constant described by this instruction.
default Utf8EntryPREVIEW	name()	Returns the name of the field.
static FieldInstructionPREVIEW	of(OpcodePREVIEW op, ClassEntryPREVIEW owner, NameAndTypeEntryPREVIEW nameAndType)	Returns a field access instruction.
static FieldInstructionPREVIEW	of(OpcodePREVIEW op, ClassEntryPREVIEW owner, Utf8EntryPREVIEW name, Utf8EntryPREVIEW type)	Returns a field access instruction.
static FieldInstructionPREVIEW	of(OpcodePREVIEW op, FieldRefEntryPREVIEW field)	Returns a field access instruction.
default ClassEntryPREVIEW	owner()	Returns the class holding the field.
default Utf8EntryPREVIEW	type()	Returns the field descriptor of the field.
default ClassDesc	typeSymbol()	Returns a symbolic descriptor for the type of the field.

Methods declared in interface java.lang.classfile.Instruction^PREVIEW

opcode, sizeInBytes

Method Details

field

FieldRefEntryPREVIEW field()

Returns the FieldRefEntry^PREVIEW constant described by this instruction.

Returns:

the FieldRefEntry^PREVIEW constant described by this instruction

owner

default ClassEntryPREVIEW owner()

Returns the class holding the field.

Returns:

the class holding the field

name

default Utf8EntryPREVIEW name()

Returns the name of the field.

Returns:

the name of the field

type

default Utf8EntryPREVIEW type()

Returns the field descriptor of the field.

Returns:

the field descriptor of the field

typeSymbol

default ClassDesc typeSymbol()

Returns a symbolic descriptor for the type of the field.

Returns:

a symbolic descriptor for the type of the field

of

static FieldInstructionPREVIEW of(OpcodePREVIEW op,
 FieldRefEntryPREVIEW field)

Returns a field access instruction.

Parameters:

op - the opcode for the specific type of field access instruction, which must be of kind Opcode.Kind.FIELD_ACCESS^PREVIEW

field - a constant pool entry describing the field

Returns:

a field access instruction

of

static FieldInstructionPREVIEW of(OpcodePREVIEW op,
 ClassEntryPREVIEW owner,
 Utf8EntryPREVIEW name,
 Utf8EntryPREVIEW type)

Returns a field access instruction.

Parameters:

op - the opcode for the specific type of field access instruction, which must be of kind Opcode.Kind.FIELD_ACCESS^PREVIEW

owner - the class holding the field

name - the name of the field

type - the field descriptor

Returns:

a field access instruction

of

static FieldInstructionPREVIEW of(OpcodePREVIEW op,
 ClassEntryPREVIEW owner,
 NameAndTypeEntryPREVIEW nameAndType)

Returns a field access instruction.

Parameters:

op - the opcode for the specific type of field access instruction, which must be of kind Opcode.Kind.FIELD_ACCESS^PREVIEW

owner - the class holding the field

nameAndType - the name and field descriptor of the field

Returns:

a field access instruction