PaddingLayout (Java SE 23 & JDK 23)
Description: declaration: module: java.base, package: java.lang.foreign, interface: PaddingLayout
Keywords: java.lang.foreign.PaddingLayout interface

# Interface PaddingLayout

All Superinterfaces:
  `MemoryLayout`

public sealed interface PaddingLayout extends MemoryLayout
A padding layout. A padding layout specifies the size of extra space which is typically not accessed by applications, and is typically used for aligning member layouts around word boundaries.

Implementation Requirements:
  Implementing classes are immutable, thread-safe and value-based.
Since:
  22

- ## Nested Class Summary

  ### Nested classes/interfaces declared in interface java.lang.foreign.MemoryLayout

  `MemoryLayout.PathElement`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `PaddingLayout`
  `withByteAlignment(long byteAlignment)`
  Returns a memory layout with the same characteristics as this layout, but with the given alignment constraint (in bytes).
  `PaddingLayout`
  `withName(String name)`
  Returns a memory layout with the same characteristics as this layout, but with the given name.
  `PaddingLayout`
  `withoutName()`
  Returns a memory layout with the same characteristics as this layout, but with no name.

  ### Methods declared in interface java.lang.foreign.MemoryLayout

  `arrayElementVarHandle, byteAlignment, byteOffset, byteOffsetHandle, byteSize, equals, hashCode, name, scale, scaleHandle, select, sliceHandle, toString, varHandle`

- ## Method Details

  - ### withName

    PaddingLayout withName(String name)
    Returns a memory layout with the same characteristics as this layout, but with the given name.
    Specified by:
      `withName` in interface `MemoryLayout`
    Parameters:
      `name` - the layout name
    Returns:
      a memory layout with the same characteristics as this layout, but with the given name
    See Also:
      - `MemoryLayout.name()`

  - ### withoutName

    PaddingLayout withoutName()
    Returns a memory layout with the same characteristics as this layout, but with no name.
    Specified by:
      `withoutName` in interface `MemoryLayout`
    Returns:
      a memory layout with the same characteristics as this layout, but with no name
    See Also:
      - `MemoryLayout.name()`

  - ### withByteAlignment

    PaddingLayout withByteAlignment(long byteAlignment)
    Returns a memory layout with the same characteristics as this layout, but with the given alignment constraint (in bytes).
    Specified by:
      `withByteAlignment` in interface `MemoryLayout`
    Parameters:
      `byteAlignment` - the layout alignment constraint, expressed in bytes
    Returns:
      a memory layout with the same characteristics as this layout, but with the given alignment constraint (in bytes)
    Throws:
      `IllegalArgumentException` - if `byteAlignment` is not a power of two