# Uses of Interface
java.lang.foreign.ValueLayout

Packages that use ValueLayoutPREVIEW
Package
Description
java.lang.foreign
Provides low-level access to memory and functions outside the Java runtime.
java.lang.invoke
The `java.lang.invoke` package provides low-level primitives for interacting with the Java Virtual Machine.

## Uses of ValueLayoutPREVIEW in java.lang.foreign

Subinterfaces of ValueLayoutPREVIEW in java.lang.foreign
Modifier and Type
Interface
Description
`interface`
`AddressLayoutPREVIEW`
Preview.
A value layout used to model the address of some region of memory.
`static interface`
`ValueLayout.OfBooleanPREVIEW`
Preview.
A value layout whose carrier is `boolean.class`.
`static interface`
`ValueLayout.OfBytePREVIEW`
Preview.
A value layout whose carrier is `byte.class`.
`static interface`
`ValueLayout.OfCharPREVIEW`
Preview.
A value layout whose carrier is `char.class`.
`static interface`
`ValueLayout.OfDoublePREVIEW`
Preview.
A value layout whose carrier is `double.class`.
`static interface`
`ValueLayout.OfFloatPREVIEW`
Preview.
A value layout whose carrier is `float.class`.
`static interface`
`ValueLayout.OfIntPREVIEW`
Preview.
A value layout whose carrier is `int.class`.
`static interface`
`ValueLayout.OfLongPREVIEW`
Preview.
A value layout whose carrier is `long.class`.
`static interface`
`ValueLayout.OfShortPREVIEW`
Preview.
A value layout whose carrier is `short.class`.
Methods in java.lang.foreign that return ValueLayoutPREVIEW
Modifier and Type
Method
Description
`ValueLayoutPREVIEW`
ValueLayout.`withByteAlignment(long byteAlignment)`
Returns a memory layout with the same characteristics as this layout, but with the given alignment constraint (in bytes).
`ValueLayoutPREVIEW`
ValueLayout.`withName(String name)`
Returns a memory layout with the same characteristics as this layout, but with the given name.
`ValueLayoutPREVIEW`
ValueLayout.`withOrder(ByteOrder order)`
Returns a value layout with the same characteristics as this layout, but with the given byte order.
`ValueLayoutPREVIEW`
ValueLayout.`withoutName()`
Returns a memory layout with the same characteristics as this layout, but with no name.
Methods in java.lang.foreign with parameters of type ValueLayoutPREVIEW
Modifier and Type
Method
Description
`static void`
MemorySegment.`copy(MemorySegmentPREVIEW srcSegment, ValueLayoutPREVIEW srcElementLayout, long srcOffset, MemorySegmentPREVIEW dstSegment, ValueLayoutPREVIEW dstElementLayout, long dstOffset, long elementCount)`
Performs a bulk copy from source segment to destination segment.
`static void`
MemorySegment.`copy(MemorySegmentPREVIEW srcSegment, ValueLayoutPREVIEW srcLayout, long srcOffset, Object dstArray, int dstIndex, int elementCount)`
Copies a number of elements from a source memory segment to a destination array.
`static void`
MemorySegment.`copy(Object srcArray, int srcIndex, MemorySegmentPREVIEW dstSegment, ValueLayoutPREVIEW dstLayout, long dstOffset, int elementCount)`
Copies a number of elements from a source array to a destination memory segment.

## Uses of ValueLayoutPREVIEW in java.lang.invoke

Methods in java.lang.invoke with parameters of type ValueLayoutPREVIEW
Modifier and Type
Method
Description
`static VarHandle`
MethodHandles.`memorySegmentViewVarHandle(ValueLayoutPREVIEW layout)`
Preview.
Creates a var handle object, which can be used to dereference a memory segmentPREVIEW at a given byte offset, using the provided value layout.