MonitorInstruction (Java SE 23 & JDK 23)
Description: declaration: module: java.base, package: java.lang.classfile.instruction, interface: MonitorInstruction
Keywords: java.lang.classfile.instruction.MonitorInstruction interface

# Interface MonitorInstruction

All Superinterfaces:
  `ClassFileElementPREVIEW`, `CodeElementPREVIEW`, `InstructionPREVIEW`

public sealed interface MonitorInstruction extends InstructionPREVIEW
`MonitorInstruction` is a preview API of the Java platform.
Programs can only use `MonitorInstruction` 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 `monitorenter` or `monitorexit` 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

  Static Methods
  Modifier and Type
  Method
  Description
  `static MonitorInstructionPREVIEW`
  `of(OpcodePREVIEW op)`
  Returns a monitor instruction.

  ### Methods declared in interface java.lang.classfile.InstructionPREVIEW

  `opcode, sizeInBytes`

- ## Method Details

  - ### of

    static MonitorInstructionPREVIEW of(OpcodePREVIEW op)
    Returns a monitor instruction.
    Parameters:
      `op` - the opcode for the specific type of monitor instruction, which must be of kind `Opcode.Kind.MONITOR`PREVIEW
    Returns:
      a monitor instruction
    Throws:
      `IllegalArgumentException` - if the opcode kind is not `Opcode.Kind.MONITOR`PREVIEW.