New APIs in Java 23

Comparing Java 23 (23-ea+18-1469-open) with Java 21 (21.0.2+13-LTS-tem).

Element	Modification
java.base
java.io
Console
isTerminal()	added
java.lang.classfile.attribute	added preview
java.lang.classfile.components	added preview
java.lang.classfile.constantpool	added preview
java.lang.classfile.instruction	added preview
java.lang.classfile	added preview
java.lang.foreign
AddressLayout	- preview
Arena	- preview
allocate(long, long)	+ abstract
FunctionDescriptor	- preview
GroupLayout	- preview
Linker.Option	- preview
critical(boolean)	added
isTrivial()	removed
Linker	- preview
canonicalLayouts()	added
MemoryLayout.PathElement	- preview
MemoryLayout	- preview
arrayElementVarHandle(MemoryLayout.PathElement...)	added
byteOffset(MemoryLayout.PathElement...)	+ abstract
byteOffsetHandle(MemoryLayout.PathElement...)	+ abstract
scale(long, long)	added
scaleHandle()	added
select(MemoryLayout.PathElement...)	+ abstract
sequenceLayout(MemoryLayout)	removed
sliceHandle(MemoryLayout.PathElement...)	+ abstract
varHandle(MemoryLayout.PathElement...)	+ abstract
MemorySegment.Scope	- preview
MemorySegment	- preview
asSlice(long, MemoryLayout)	+ abstract
copyFrom(MemorySegment)	+ abstract
get(AddressLayout, long)	+ abstract
get(ValueLayout.OfBoolean, long)	+ abstract
get(ValueLayout.OfByte, long)	+ abstract
get(ValueLayout.OfChar, long)	+ abstract
get(ValueLayout.OfDouble, long)	+ abstract
get(ValueLayout.OfFloat, long)	+ abstract
get(ValueLayout.OfInt, long)	+ abstract
get(ValueLayout.OfLong, long)	+ abstract
get(ValueLayout.OfShort, long)	+ abstract
getAtIndex(AddressLayout, long)	+ abstract
getAtIndex(ValueLayout.OfBoolean, long)	+ abstract
getAtIndex(ValueLayout.OfByte, long)	+ abstract
getAtIndex(ValueLayout.OfChar, long)	+ abstract
getAtIndex(ValueLayout.OfDouble, long)	+ abstract
getAtIndex(ValueLayout.OfFloat, long)	+ abstract
getAtIndex(ValueLayout.OfInt, long)	+ abstract
getAtIndex(ValueLayout.OfLong, long)	+ abstract
getAtIndex(ValueLayout.OfShort, long)	+ abstract
getString(long)	added
getString(long, Charset)	added
getUtf8String(long)	removed
mismatch(MemorySegment)	+ abstract
segmentOffset(MemorySegment)	removed
set(AddressLayout, long, MemorySegment)	+ abstract
set(ValueLayout.OfBoolean, long, boolean)	+ abstract
set(ValueLayout.OfByte, long, byte)	+ abstract
set(ValueLayout.OfChar, long, char)	+ abstract
set(ValueLayout.OfDouble, long, double)	+ abstract
set(ValueLayout.OfFloat, long, float)	+ abstract
set(ValueLayout.OfInt, long, int)	+ abstract
set(ValueLayout.OfLong, long, long)	+ abstract
set(ValueLayout.OfShort, long, short)	+ abstract
setAtIndex(AddressLayout, long, MemorySegment)	+ abstract
setAtIndex(ValueLayout.OfBoolean, long, boolean)	+ abstract
setAtIndex(ValueLayout.OfByte, long, byte)	+ abstract
setAtIndex(ValueLayout.OfChar, long, char)	+ abstract
setAtIndex(ValueLayout.OfDouble, long, double)	+ abstract
setAtIndex(ValueLayout.OfFloat, long, float)	+ abstract
setAtIndex(ValueLayout.OfInt, long, int)	+ abstract
setAtIndex(ValueLayout.OfLong, long, long)	+ abstract
setAtIndex(ValueLayout.OfShort, long, short)	+ abstract
setString(long, String)	added
setString(long, String, Charset)	added
setUtf8String(long, String)	removed
PaddingLayout	- preview
SegmentAllocator	- preview
allocate(AddressLayout, MemorySegment)	removed
allocate(MemoryLayout, long)	added
allocate(ValueLayout.OfByte, byte)	removed
allocate(ValueLayout.OfChar, char)	removed
allocate(ValueLayout.OfDouble, double)	removed
allocate(ValueLayout.OfFloat, float)	removed
allocate(ValueLayout.OfInt, int)	removed
allocate(ValueLayout.OfLong, long)	removed
allocate(ValueLayout.OfShort, short)	removed
allocateArray(MemoryLayout, long)	removed
allocateArray(ValueLayout.OfByte, byte...)	removed
allocateArray(ValueLayout.OfChar, char...)	removed
allocateArray(ValueLayout.OfDouble, double...)	removed
allocateArray(ValueLayout.OfFloat, float...)	removed
allocateArray(ValueLayout.OfInt, int...)	removed
allocateArray(ValueLayout.OfLong, long...)	removed
allocateArray(ValueLayout.OfShort, short...)	removed
allocateFrom(AddressLayout, MemorySegment)	added
allocateFrom(String)	added
allocateFrom(String, Charset)	added
allocateFrom(ValueLayout, MemorySegment,...	added
allocateFrom(ValueLayout.OfByte, byte)	added
allocateFrom(ValueLayout.OfByte, byte...)	added
allocateFrom(ValueLayout.OfChar, char)	added
allocateFrom(ValueLayout.OfChar, char...)	added
allocateFrom(ValueLayout.OfDouble, double)	added
allocateFrom(ValueLayout.OfDouble, double...)	added
allocateFrom(ValueLayout.OfFloat, float)	added
allocateFrom(ValueLayout.OfFloat, float...)	added
allocateFrom(ValueLayout.OfInt, int)	added
allocateFrom(ValueLayout.OfInt, int...)	added
allocateFrom(ValueLayout.OfLong, long)	added
allocateFrom(ValueLayout.OfLong, long...)	added
allocateFrom(ValueLayout.OfShort, short)	added
allocateFrom(ValueLayout.OfShort, short...)	added
allocateUtf8String(String)	removed
SequenceLayout	- preview
StructLayout	- preview
SymbolLookup	- preview
UnionLayout	- preview
ValueLayout.OfBoolean	- preview
ValueLayout.OfByte	- preview
ValueLayout.OfChar	- preview
ValueLayout.OfDouble	- preview
ValueLayout.OfFloat	- preview
ValueLayout.OfInt	- preview
ValueLayout.OfLong	- preview
ValueLayout.OfShort	- preview
ValueLayout	- preview
arrayElementVarHandle(int...)	removed
varHandle()	added
java.lang.invoke
MethodHandles
collectCoordinates(VarHandle, int, MethodHandle)	- preview
dropCoordinates(VarHandle, int, Class...)	- preview
filterCoordinates(VarHandle, int, MethodHandle...)	- preview
filterValue(VarHandle, MethodHandle, MethodHandle)	- preview
insertCoordinates(VarHandle, int, Object...)	- preview
memorySegmentViewVarHandle(ValueLayout)	removed preview
permuteCoordinates(VarHandle, List, int...)	- preview
java.lang.reflect
ClassFileFormatVersion
RELEASE_22	added
RELEASE_23	added
java.lang.runtime
ExactConversionsSupport	added
java.lang
Character.UnicodeBlock
CJK_UNIFIED_IDEOGRAPHS_EXTENSION_I	added
Class
forPrimitiveName(String)	added
isUnnamedClass()	removed preview
ModuleLayer.Controller
enableNativeAccess(Module)	- preview
Module
isNativeAccessEnabled()	- preview
ThreadGroup
resume()	removed
stop()	removed
suspend()	removed
Thread
countStackFrames()	removed
resume()	removed
suspend()	removed
StackWalker.Option
DROP_METHOD_INFO	added
java.net
Inet4Address
ofLiteral(String)	added
Inet6Address
ofLiteral(String)	added
InetAddress
ofLiteral(String)	added
java.nio.channels
FileChannel
map(FileChannel.MapMode, long, long, Arena)	- preview
java.nio.charset
StandardCharsets
UTF_32BE	added
UTF_32LE	added
UTF_32	added
java.nio.file
Path
resolve(Path, Path...)	added
resolve(String, String...)	added
java.security.interfaces
DSAParams	+ implements AlgorithmParameterSpec
DSAPrivateKey
getParams()	added
DSAPublicKey
getParams()	added
ECPrivateKey
getParams()	added
ECPublicKey
getParams()	added
EdECPrivateKey
getParams()	added
EdECPublicKey
getParams()	added
RSAPrivateKey
getParams()	added
RSAPublicKey
getParams()	added
XECPrivateKey
getParams()	added
XECPublicKey
getParams()	added
java.security
AsymmetricKey	added
PrivateKey	- implements Key + implements AsymmetricKey
PublicKey	- implements Key + implements AsymmetricKey
java.text
ChoiceFormat
toString()	added
CompactNumberFormat
toString()	added
DecimalFormat
toString()	added
ListFormat	added
MessageFormat
toString()	added
SimpleDateFormat
toString()	added
ListFormat.Style	added
ListFormat.Type	added
java.util.concurrent
ForkJoinPool
invokeAll(Collection)	+ throws InterruptedException
invokeAllUninterruptibly(Collection)	added
ForkJoinTask
adaptInterruptible(Runnable)	added
adaptInterruptible(Runnable, Object)	added
java.util.random
RandomGenerator
equiDoubles(double, double, boolean, boolean)	added
java.util.stream
Gatherers	added preview
Gatherer.Downstream	added preview
Gatherer.Integrator.Greedy	added preview
Gatherer.Integrator	added preview
Gatherer	added preview
Stream
gather(Gatherer)	added preview
java.util.zip
Deflater
getTotalIn()	+ deprecated
getTotalOut()	+ deprecated
Inflater
getTotalIn()	+ deprecated
getTotalOut()	+ deprecated
ZipFile
toString()	added
javax.crypto.interfaces
DHPrivateKey
getParams()	added
DHPublicKey
getParams()	added
java.compiler
javax.lang.model.element
RecordComponentElement
asType()	added
TypeElement
isUnnamed()	removed preview
VariableElement
isUnnamed()	- preview
javax.lang.model.util
AbstractAnnotationValueVisitorPreview	added preview
AbstractElementVisitorPreview	added preview
AbstractTypeVisitorPreview	added preview
ElementKindVisitorPreview	added preview
ElementScanner6
visitRecordComponent(RecordComponentElement,...	added
ElementScannerPreview	added preview
SimpleAnnotationValueVisitorPreview	added preview
SimpleElementVisitorPreview	added preview
SimpleTypeVisitorPreview	added preview
TypeKindVisitorPreview	added preview
Elements
getEnumConstantBody(VariableElement)	added
Types
stripAnnotations(TypeMirror)	added
javax.lang.model
SourceVersion
RELEASE_22	added
RELEASE_23	added
javax.tools
SimpleJavaFileObject
forSource(URI, String)	added
java.desktop
java.awt.peer
WindowPeer
getAppropriateGraphicsConfiguration(GraphicsConfig...	added
javax.swing.plaf.synth
SynthTreeUI
getCollapsedIcon()	added
javax.swing
JFileChooser
setEnabled(boolean)	added
JScrollBar
setMaximumSize(Dimension)	added
setMinimumSize(Dimension)	added
java.management.rmi
javax.management.remote.rmi
RMIConnector
getMBeanServerConnection(Subject)	removed
java.management
javax.management.loading
MLetContent	removed
MLet	removed
PrivateMLet	removed
MLetMBean	removed
javax.management.remote
JMXConnector
getMBeanServerConnection(Subject)	- abstract
java.xml.crypto
javax.xml.crypto.dsig
SignatureMethod
SHA3_224_RSA_MGF1	added
SHA3_256_RSA_MGF1	added
SHA3_384_RSA_MGF1	added
SHA3_512_RSA_MGF1	added
java.xml
javax.xml.catalog
CatalogManager
catalogResolver(Catalog,...	added
CatalogResolver.NotFoundAction	added
GroupEntry.ResolveType	removed

Data Source

This report is based on simple comparison of all public and protected APIs of the java.* and javax.* packages of JDK builds 23-ea+18-1469-open and 21.0.2+13-LTS-tem. It does not make statements about compatibility.

For the latest Java versions the corresponding CSRs (Compatibility & Specification Review) are linked for a quick reference to find out about the reasoning of the change.

More detailed API comparisons based on the japicmp tool can be found here.