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

# Interface LongEntry

All Superinterfaces:
  `AnnotationConstantValueEntryPREVIEW`, `ClassFileElementPREVIEW`, `ConstantValueEntryPREVIEW`, `LoadableConstantEntryPREVIEW`, `PoolEntryPREVIEW`, `WritableElementPREVIEW<PoolEntryPREVIEW>`

public sealed interface LongEntry extends AnnotationConstantValueEntryPREVIEW, ConstantValueEntryPREVIEW
`LongEntry` is a preview API of the Java platform.
Programs can only use `LongEntry` 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 `CONSTANT_Long_info` constant in the constant pool of a classfile.

See Java Virtual Machine Specification:
  4.4.5 The CONSTANT_Long_info and CONSTANT_Double_info Structures
Since:
  22

- ## Method Summary

  Modifier and Type
  Method
  Description
  `long`
  `longValue()`
  Returns the long value.
  `default TypeKindPREVIEW`
  `typeKind()`
  Returns the type of the constant.

  ### Methods declared in interface java.lang.classfile.constantpool.AnnotationConstantValueEntryPREVIEW

  `constantValue`

  ### Methods declared in interface java.lang.classfile.constantpool.ConstantValueEntryPREVIEW

  `constantValue`

  ### Methods declared in interface java.lang.classfile.constantpool.PoolEntryPREVIEW

  `constantPool, index, tag, width`

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

  `writeTo`

- ## Method Details

  - ### longValue

    long longValue()
    Returns the long value.
    Returns:
      the long value

  - ### typeKind

    default TypeKindPREVIEW typeKind()
    Returns the type of the constant.
    Specified by:
      `typeKind` in interface `LoadableConstantEntryPREVIEW`
    Returns:
      the type of the constant