New APIs in Java 23

Comparing Java 23 (23-ea+18-1469-open) with Java 20 (20.0.2+9-tem).

Element	Modification
java.base
java.io
Console	+ sealed
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.constant
ConstantDescs
BSM_CLASS_DATA	added
BSM_CLASS_DATA_AT	added
CLASS_INIT_NAME	added
INIT_NAME	added
MTD_void	added
ClassDesc
resolveConstantDesc(MethodHandles.Lookup)	added
MethodHandleDesc
resolveConstantDesc(MethodHandles.Lookup)	added
MethodTypeDesc
descriptorString()	+ abstract
of(ClassDesc)	added
of(ClassDesc, List)	added
resolveConstantDesc(MethodHandles.Lookup)	added
ModuleDesc	added
PackageDesc	added
java.lang.foreign
AddressLayout	added
Arena	- preview
allocate(long, long)	+ abstract
global()	added
isCloseableBy(Thread)	removed
ofAuto()	added
ofConfined()	added
ofShared()	added
openConfined()	removed
openShared()	removed
scope()	added
scope()	removed
FunctionDescriptor	- preview
GroupLayout	- preview
withBitAlignment(long)	removed
withByteAlignment(long)	added
withoutName()	added
Linker.Option.CaptureCallState	removed preview
Linker.Option	- preview
captureCallState(String...)	added
captureCallState(String...)	removed
captureStateLayout()	added
critical(boolean)	added
Linker	- preview
canonicalLayouts()	added
downcallHandle(MemorySegment, FunctionDescriptor,...	+ abstract
upcallStub(MethodHandle, FunctionDescriptor,...	added
upcallStub(MethodHandle, FunctionDescriptor,...	removed
MemoryLayout.PathElement	- preview
dereferenceElement()	added
groupElement(long)	added
MemoryLayout	- preview
arrayElementVarHandle(MemoryLayout.PathElement...)	added
bitAlignment()	removed
bitOffset(MemoryLayout.PathElement...)	removed
bitOffsetHandle(MemoryLayout.PathElement...)	removed
bitSize()	removed
byteAlignment()	+ abstract
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
valueLayout(Class, ByteOrder)	removed
varHandle(MemoryLayout.PathElement...)	+ abstract
withBitAlignment(long)	removed
withByteAlignment(long)	added
withoutName()	added
MemorySegment.Scope	added
MemorySegment	- preview
allocateNative(MemoryLayout, SegmentScope)	removed
allocateNative(long, SegmentScope)	removed
allocateNative(long, long, SegmentScope)	removed
array()	removed
asSlice(long)	+ abstract
asSlice(long, MemoryLayout)	added
asSlice(long, long, long)	added
copyFrom(MemorySegment)	+ abstract
get(AddressLayout, long)	added
get(ValueLayout.OfAddress, long)	removed
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)	added
getAtIndex(ValueLayout.OfAddress, long)	removed
getAtIndex(ValueLayout.OfBoolean, long)	added
getAtIndex(ValueLayout.OfByte, long)	added
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
heapBase()	added
isAccessibleBy(Thread)	added
mismatch(MemorySegment)	+ abstract
ofAddress(long, long)	removed
ofAddress(long, long, SegmentScope)	removed
ofAddress(long, long, SegmentScope, Runnable)	removed
reinterpret(Arena, Consumer)	added
reinterpret(long)	added
reinterpret(long, Arena, Consumer)	added
scope()	added
scope()	removed
segmentOffset(MemorySegment)	removed
set(AddressLayout, long, MemorySegment)	added
set(ValueLayout.OfAddress, long, MemorySegment)	removed
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)	added
setAtIndex(ValueLayout.OfAddress, long,...	removed
setAtIndex(ValueLayout.OfBoolean, long, boolean)	added
setAtIndex(ValueLayout.OfByte, long, byte)	added
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
withBitAlignment(long)	removed
withByteAlignment(long)	added
withoutName()	added
SegmentAllocator	- preview
allocate(MemoryLayout, long)	added
allocate(ValueLayout.OfAddress, MemorySegment)	removed
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
nativeAllocator(SegmentScope)	removed
SegmentScope	removed preview
SequenceLayout	- preview
withBitAlignment(long)	removed
withByteAlignment(long)	added
withoutName()	added
StructLayout	- preview
withBitAlignment(long)	removed
withByteAlignment(long)	added
withoutName()	added
SymbolLookup	- preview
libraryLookup(Path, Arena)	added
libraryLookup(Path, SegmentScope)	removed
libraryLookup(String, Arena)	added
libraryLookup(String, SegmentScope)	removed
or(SymbolLookup)	added
UnionLayout	- preview
withBitAlignment(long)	removed
withByteAlignment(long)	added
withoutName()	added
VaList.Builder	removed preview
VaList	removed preview
ValueLayout.OfAddress	removed preview
ValueLayout.OfBoolean	- preview
withBitAlignment(long)	removed
withByteAlignment(long)	added
withoutName()	added
ValueLayout.OfByte	- preview
withBitAlignment(long)	removed
withByteAlignment(long)	added
withoutName()	added
ValueLayout.OfChar	- preview
withBitAlignment(long)	removed
withByteAlignment(long)	added
withoutName()	added
ValueLayout.OfDouble	- preview
withBitAlignment(long)	removed
withByteAlignment(long)	added
withoutName()	added
ValueLayout.OfFloat	- preview
withBitAlignment(long)	removed
withByteAlignment(long)	added
withoutName()	added
ValueLayout.OfInt	- preview
withBitAlignment(long)	removed
withByteAlignment(long)	added
withoutName()	added
ValueLayout.OfLong	- preview
withBitAlignment(long)	removed
withByteAlignment(long)	added
withoutName()	added
ValueLayout.OfShort	- preview
withBitAlignment(long)	removed
withByteAlignment(long)	added
withoutName()	added
ValueLayout	- preview
arrayElementVarHandle(int...)	removed
varHandle()	added
withBitAlignment(long)	removed
withByteAlignment(long)	added
withoutName()	added
java.lang.invoke
ClassSpecializer.Factory	removed
ClassSpecializer.SpeciesData	removed
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
StringConcatFactory
MAX_INDY_CONCAT_ARG_SLOTS	added preview
makeConcatWithTemplate(List, List)	added preview
makeConcatWithTemplateCluster(List, List, int)	added preview
makeConcatWithTemplateGetters(List, List, int)	added preview
VarHandle
isAccessModeSupported(VarHandle.AccessMode)	- final
java.lang.reflect
ClassFileFormatVersion
RELEASE_21	added
RELEASE_22	added
RELEASE_23	added
java.lang.runtime
ExactConversionsSupport	added
SwitchBootstraps	- preview
TemplateRuntime	added preview
java.lang
Character.UnicodeBlock
CJK_UNIFIED_IDEOGRAPHS_EXTENSION_I	added
Character
isEmoji(int)	added
isEmojiComponent(int)	added
isEmojiModifier(int)	added
isEmojiModifierBase(int)	added
isEmojiPresentation(int)	added
isExtendedPictographic(int)	added
Class
forPrimitiveName(String)	added
Compiler	removed
FdLibm.Cbrt	removed
FdLibm.Hypot	removed
FdLibm.Pow	removed
MatchException	- preview
Math
clamp(double, double, double)	added
clamp(float, float, float)	added
clamp(long, int, int)	added
clamp(long, long, long)	added
ModuleLayer.Controller
enableNativeAccess(Module)	- preview
Module
isNativeAccessEnabled()	- preview
ScopedValue.Carrier	added preview
ScopedValue	added preview
StrictMath
clamp(double, double, double)	added
clamp(float, float, float)	added
clamp(long, int, int)	added
clamp(long, long, long)	added
StringBuffer	+ implements Appendable
repeat(CharSequence, int)	added
repeat(int, int)	added
StringBuilder	+ implements Appendable
repeat(CharSequence, int)	added
repeat(int, int)	added
String
indexOf(String, int, int)	added
indexOf(int, int, int)	added
splitWithDelimiters(String, int)	added
ThreadGroup
allowThreadSuspension(boolean)	removed
resume()	removed
stop()	removed
suspend()	removed
Thread
countStackFrames()	removed
isVirtual()	- preview
ofPlatform()	- preview
ofVirtual()	- preview
resume()	removed
startVirtualThread(Runnable)	- preview
suspend()	removed
StackWalker.Option
DROP_METHOD_INFO	added
StringTemplate.Processor.Linkage	added preview
StringTemplate.Processor	added preview
StringTemplate	added preview
Thread.Builder.OfPlatform	- preview
allowSetThreadLocals(boolean)	removed
Thread.Builder.OfVirtual	- preview
allowSetThreadLocals(boolean)	removed
Thread.Builder	- preview
allowSetThreadLocals(boolean)	removed
java.net
Inet4Address
ofLiteral(String)	added
Inet6Address
ofLiteral(String)	added
InetAddress
ofLiteral(String)	added
java.nio.channels
FileChannel
map(FileChannel.MapMode, long, long, Arena)	added
map(FileChannel.MapMode, long, long, SegmentScope)	removed 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.cert
CertStore
getDefaultType()	+ final
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
ConcurrentSkipListMap
putFirst(Object, Object)	added
putLast(Object, Object)	added
ConcurrentSkipListSet
addFirst(Object)	added
addLast(Object)	added
CopyOnWriteArrayList
addFirst(Object)	added
addLast(Object)	added
getFirst()	added
getLast()	added
removeFirst()	added
removeLast()	added
reversed()	added
DelayQueue
remove()	added
Executors
newThreadPerTaskExecutor(ThreadFactory)	- preview
newVirtualThreadPerTaskExecutor()	- preview
ForkJoinPool
invokeAll(Collection)	+ throws InterruptedException
invokeAllUninterruptibly(Collection)	added
ForkJoinTask
adaptInterruptible(Runnable)	added
adaptInterruptible(Runnable, Object)	added
StructureViolationException	added preview
StructuredTaskScope.ShutdownOnFailure	added preview
StructuredTaskScope.ShutdownOnSuccess	added preview
StructuredTaskScope	added preview
StructuredTaskScope.Subtask.State	added preview
StructuredTaskScope.Subtask	added preview
java.util.random
RandomGenerator
equiDoubles(double, double, boolean, boolean)	added
java.util.regex
Pattern
splitWithDelimiters(CharSequence, int)	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
java.util
ArrayList
addFirst(Object)	added
addLast(Object)	added
getFirst()	added
getLast()	added
removeFirst()	added
removeLast()	added
Arrays	+ final
Collections
newSequencedSetFromMap(SequencedMap)	added
shuffle(List, RandomGenerator)	added
unmodifiableSequencedCollection(SequencedCollectio...	added
unmodifiableSequencedMap(SequencedMap)	added
unmodifiableSequencedSet(SequencedSet)	added
FormatProcessor	added preview
LinkedHashMap	- implements Map + implements SequencedMap
putFirst(Object, Object)	added
putLast(Object, Object)	added
reversed()	added
sequencedEntrySet()	added
sequencedKeySet()	added
sequencedValues()	added
LinkedHashSet	- implements Set + implements SequencedSet
addFirst(Object)	added
addLast(Object)	added
getFirst()	added
getLast()	added
removeFirst()	added
removeLast()	added
reversed()	added
LinkedList
reversed()	added
Locale
availableLocales()	added
caseFoldLanguageTag(String)	added
TreeMap
putFirst(Object, Object)	added
putLast(Object, Object)	added
TreeSet
addFirst(Object)	added
addLast(Object)	added
Deque	+ implements SequencedCollection
reversed()	added
List	- implements Collection + implements SequencedCollection
addFirst(Object)	added
addLast(Object)	added
getFirst()	added
getLast()	added
removeFirst()	added
removeLast()	added
reversed()	added
NavigableMap
reversed()	added
NavigableSet
removeFirst()	added
removeLast()	added
reversed()	added
SequencedCollection	added
SequencedMap	added
SequencedSet	added
SortedMap	- implements Map + implements SequencedMap
putFirst(Object, Object)	added
putLast(Object, Object)	added
reversed()	added
SortedSet	+ implements SequencedSet
addFirst(Object)	added
addLast(Object)	added
getFirst()	added
getLast()	added
removeFirst()	added
removeLast()	added
reversed()	added
javax.crypto.interfaces
DHPrivateKey
getParams()	added
DHPublicKey
getParams()	added
javax.crypto
DecapsulateException	added
KEM.Decapsulator	added
KEM.Encapsulated	added
KEM.Encapsulator	added
KEM	added
KEMSpi.DecapsulatorSpi	added
KEMSpi.EncapsulatorSpi	added
KEMSpi	added
javax.net.ssl
KeyManagerFactory
getDefaultAlgorithm()	+ final
TrustManagerFactory
getDefaultAlgorithm()	+ final
java.compiler
javax.lang.model.element
RecordComponentElement
asType()	added
VariableElement
isUnnamed()	added
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_21	added
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
SynthComboBoxUI
getMinimumSize(JComponent)	added
SynthLookAndFeel
load(URL)	+ deprecated + forRemoval
SynthTreeUI
getCollapsedIcon()	added
javax.swing.text.html
AccessibleHTML.HTMLAccessibleContext
setElementInfo(AccessibleHTML.ElementInfo)	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
RMIIIOPServerImpl	removed
java.management
javax.management.loading
MLetContent	removed
MLet	removed
PrivateMLet	removed
MLetMBean	removed
javax.management.remote
JMXConnector
getMBeanServerConnection(Subject)	- abstract + deprecated + forRemoval
java.net.http
java.net.http
HttpClient	+ implements AutoCloseable
awaitTermination(Duration)	added
close()	added
isTerminated()	added
shutdown()	added
shutdownNow()	added
java.xml.crypto
javax.xml.crypto.dsig
SignatureMethod
ED25519	added
ED448	added
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 20.0.2+9-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.