Module java.base

Package java.lang.classfile.instruction^PREVIEW

Interface TypeCheckInstruction

All Superinterfaces:

ClassFileElementPREVIEW, CodeElementPREVIEW, InstructionPREVIEW

public sealed interface TypeCheckInstruction
extends InstructionPREVIEW

TypeCheckInstruction is a preview API of the Java platform.

Programs can only use TypeCheckInstruction when preview features are enabled.

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

Models an instanceof or checkcast instruction in the code array of a Code attribute. Delivered as a CodeElement^PREVIEW when traversing the elements of a CodeModel^PREVIEW.

Since:

22

Method Summary

Modifier and Type	Method	Description
static TypeCheckInstructionPREVIEW	of(OpcodePREVIEW op, ClassEntryPREVIEW type)	Returns a type check instruction.
static TypeCheckInstructionPREVIEW	of(OpcodePREVIEW op, ClassDesc type)	Returns a type check instruction.
ClassEntryPREVIEW	type()	Returns the type against which the instruction checks or casts.

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

opcode, sizeInBytes

Method Details

type

ClassEntryPREVIEW type()

Returns the type against which the instruction checks or casts.

Returns:

the type against which the instruction checks or casts

of

static TypeCheckInstructionPREVIEW of(OpcodePREVIEW op,
 ClassEntryPREVIEW type)

Returns a type check instruction.

Parameters:

op - the opcode for the specific type of type check instruction, which must be of kind Opcode.Kind.TYPE_CHECK^PREVIEW

type - the type against which to check or cast

Returns:

a type check instruction

of

static TypeCheckInstructionPREVIEW of(OpcodePREVIEW op,
 ClassDesc type)

Returns a type check instruction.

Parameters:

op - the opcode for the specific type of type check instruction, which must be of kind Opcode.Kind.TYPE_CHECK^PREVIEW

type - the type against which to check or cast

Returns:

a type check instruction