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Showing content from https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/lang/foreign/UnionLayout.html below:

UnionLayout (Java SE 21 & JDK 21)

All Superinterfaces:

GroupLayoutPREVIEW, MemoryLayoutPREVIEW

A group layout whose member layouts are laid out at the same starting offset.

Implementation Requirements:

Implementing classes are immutable, thread-safe and value-based.

Since:

20

• Nested Class Summary
• Method Summary

  Returns a memory layout with the same characteristics as this layout, but with the given alignment constraint (in bytes).

  Returns a memory layout with the same characteristics as this layout, but with the given name.

  Returns a memory layout with the same characteristics as this layout, but with no name.

  Methods declared in interface java.lang.foreign.MemoryLayout^PREVIEWbyteAlignment, byteOffset, byteOffsetHandle, byteSize, equals, hashCode, name, select, sliceHandle, toString, varHandle

• Method Details
  • withName

    Returns a memory layout with the same characteristics as this layout, but with the given name.

    Specified by:

    withName in interface GroupLayoutPREVIEW

    Specified by:

    withName in interface MemoryLayoutPREVIEW

    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()^PREVIEW

  • withoutName

    Returns a memory layout with the same characteristics as this layout, but with no name.

    Specified by:

    withoutName in interface GroupLayoutPREVIEW

    Specified by:

    withoutName in interface MemoryLayoutPREVIEW

    Returns:

    a memory layout with the same characteristics as this layout, but with no name

    See Also:

    • MemoryLayout.name()^PREVIEW

  • withByteAlignment

    Returns a memory layout with the same characteristics as this layout, but with the given alignment constraint (in bytes).

    Specified by:

    withByteAlignment in interface GroupLayoutPREVIEW

    Specified by:

    withByteAlignment in interface MemoryLayoutPREVIEW

    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.

    IllegalArgumentException - if byteAlignment is less than M, where M is the maximum alignment constraint in any of the member layouts associated with this group layout.

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