New APIs in Java 21

Comparing Java 21 (21.0.2+13-LTS-tem) with Java 15 (15.0.2+7-adpt).

Element	Modification
java.base
java.io
BufferedInputStream
transferTo(OutputStream)	added
CharArrayReader
read(CharBuffer)	added
Console	- final + sealed
charset()	added
FileInputStream
readAllBytes()	added
readNBytes(int)	added
transferTo(OutputStream)	added
InputStreamReader
read(CharBuffer)	added
InvalidClassException
InvalidClassException(String, String, Throwable)	added
InvalidClassException(String, Throwable)	added
InvalidObjectException
InvalidObjectException(String, Throwable)	added
ObjectInputFilter.Config
getSerialFilterFactory()	added
setSerialFilterFactory(BinaryOperator)	added
ObjectInputStream.GetField
get(String, Object)	+ throws ClassNotFoundException
ObjectStreamClass	+ final
ObjectStreamException
ObjectStreamException(String, Throwable)	added
ObjectStreamException(Throwable)	added
PrintStream
charset()	added
PushbackInputStream
transferTo(OutputStream)	added
SequenceInputStream
transferTo(OutputStream)	added
WriteAbortedException
detail	+ deprecated
ObjectInputFilter
allowFilter(Predicate, ObjectInputFilter.Status)	added
merge(ObjectInputFilter, ObjectInputFilter)	added
rejectFilter(Predicate, ObjectInputFilter.Status)	added
rejectUndecidedClass(ObjectInputFilter)	added
java.lang.annotation
ElementType
RECORD_COMPONENT	- 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	+ sealed
ofInternalName(String)	added
resolveConstantDesc(MethodHandles.Lookup)	added
ConstantDesc	+ sealed
DirectMethodHandleDesc	+ sealed
MethodHandleDesc	+ sealed
resolveConstantDesc(MethodHandles.Lookup)	added
MethodTypeDesc	+ sealed
descriptorString()	+ abstract
of(ClassDesc)	added
of(ClassDesc, List)	added
resolveConstantDesc(MethodHandles.Lookup)	added
ModuleDesc	added
PackageDesc	added
java.lang.foreign	added
java.lang.invoke
CallSite	+ sealed
ClassSpecializer.Factory	removed
ClassSpecializer.SpeciesData	removed
MethodHandle	+ sealed
asType(MethodType)	+ final
MethodHandles.Lookup
ORIGINAL	added
defineHiddenClassWithClassData(byte[], Object,...	added
MethodHandles
classData(MethodHandles.Lookup, String, Class)	added
classDataAt(MethodHandles.Lookup, String, Class,...	added
collectCoordinates(VarHandle, int, MethodHandle)	added preview
dropCoordinates(VarHandle, int, Class...)	added preview
dropReturn(MethodHandle)	added
filterCoordinates(VarHandle, int, MethodHandle...)	added preview
filterValue(VarHandle, MethodHandle, MethodHandle)	added preview
insertCoordinates(VarHandle, int, Object...)	added preview
memorySegmentViewVarHandle(ValueLayout)	added preview
permuteCoordinates(VarHandle, List, int...)	added preview
tableSwitch(MethodHandle, MethodHandle...)	added
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	+ sealed
hasInvokeExactBehavior()	added
isAccessModeSupported(VarHandle.AccessMode)	- final
withInvokeBehavior()	added
withInvokeExactBehavior()	added
java.lang.module
ModuleDescriptor.Exports
accessFlags()	added
ModuleDescriptor.Opens
accessFlags()	added
ModuleDescriptor.Requires
accessFlags()	added
ModuleDescriptor
accessFlags()	added
java.lang.ref
ReferenceQueue
remove(long)	- throws IllegalArgumentException
Reference	+ sealed
isEnqueued()	+ deprecated
refersTo(Object)	added
java.lang.reflect
AccessibleObject
AccessibleObject()	+ deprecated
Executable	+ sealed
accessFlags()	added
getParameterCount()	+ abstract
Field
accessFlags()	added
Method
invoke(Object, Object...)	- throws IllegalArgumentException
Parameter
accessFlags()	added
RecordComponent	- preview
AccessFlag.Location	added
AccessFlag	added
ClassFileFormatVersion	added
InvocationHandler
invokeDefault(Object, Method, Object...)	added
Member
accessFlags()	added
java.lang.runtime
ObjectMethods	- preview
SwitchBootstraps	added
TemplateRuntime	added preview
java.lang
Boolean
Boolean(String)	+ forRemoval
Boolean(boolean)	+ forRemoval
Byte
Byte(String)	+ forRemoval
Byte(byte)	+ forRemoval
Character.UnicodeBlock
ARABIC_EXTENDED_B	added
ARABIC_EXTENDED_C	added
CJK_UNIFIED_IDEOGRAPHS_EXTENSION_H	added
CYPRO_MINOAN	added
CYRILLIC_EXTENDED_D	added
DEVANAGARI_EXTENDED_A	added
ETHIOPIC_EXTENDED_B	added
KAKTOVIK_NUMERALS	added
KANA_EXTENDED_B	added
KAWI	added
LATIN_EXTENDED_F	added
LATIN_EXTENDED_G	added
NAG_MUNDARI	added
OLD_UYGHUR	added
TANGSA	added
TOTO	added
UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS_EXTENDED_A	added
VITHKUQI	added
ZNAMENNY_MUSICAL_NOTATION	added
Character
Character(char)	+ forRemoval
isEmoji(int)	added
isEmojiComponent(int)	added
isEmojiModifier(int)	added
isEmojiModifierBase(int)	added
isEmojiPresentation(int)	added
isExtendedPictographic(int)	added
Class
accessFlags()	added
getPermittedSubclasses()	added
getRecordComponents()	- preview
isRecord()	- preview
isSealed()	- preview
isUnnamedClass()	added preview
permittedSubclasses()	removed preview
Compiler	removed
Double
PRECISION	added
Double(String)	+ forRemoval
Double(double)	+ forRemoval
Enum
finalize()	+ deprecated + forRemoval
FdLibm.Cbrt	removed
FdLibm.Hypot	removed
FdLibm.Pow	removed
Float
PRECISION	added
Float(String)	+ forRemoval
Float(double)	+ forRemoval
Float(float)	+ forRemoval
float16ToFloat(short)	added
floatToFloat16(float)	added
IndexOutOfBoundsException
IndexOutOfBoundsException(long)	added
Integer
Integer(String)	+ forRemoval
Integer(int)	+ forRemoval
compress(int, int)	added
expand(int, int)	added
Long
Long(String)	+ forRemoval
Long(long)	+ forRemoval
compress(long, long)	added
expand(long, long)	added
MatchException	added
Math
TAU	added
ceilDiv(int, int)	added
ceilDiv(long, int)	added
ceilDiv(long, long)	added
ceilDivExact(int, int)	added
ceilDivExact(long, long)	added
ceilMod(int, int)	added
ceilMod(long, int)	added
ceilMod(long, long)	added
clamp(double, double, double)	added
clamp(float, float, float)	added
clamp(long, int, int)	added
clamp(long, long, long)	added
divideExact(int, int)	added
divideExact(long, long)	added
floorDivExact(int, int)	added
floorDivExact(long, long)	added
unsignedMultiplyHigh(long, long)	added
ModuleLayer.Controller
enableNativeAccess(Module)	added preview
Module
isNativeAccessEnabled()	added preview
Object
finalize()	+ forRemoval
Process
errorReader()	added
errorReader(Charset)	added
inputReader()	added
inputReader(Charset)	added
outputWriter()	added
outputWriter(Charset)	added
Record	- preview
Runtime
exec(String)	+ deprecated
exec(String, String[])	+ deprecated
exec(String, String[], File)	+ deprecated
runFinalization()	+ deprecated + forRemoval
ScopedValue.Carrier	added preview
ScopedValue	added preview
SecurityManager	+ deprecated + forRemoval
checkMulticast(InetAddress, byte)	+ forRemoval
Short
Short(String)	+ forRemoval
Short(short)	+ forRemoval
StrictMath
TAU	added
ceilDiv(int, int)	added
ceilDiv(long, int)	added
ceilDiv(long, long)	added
ceilDivExact(int, int)	added
ceilDivExact(long, long)	added
ceilMod(int, int)	added
ceilMod(long, int)	added
ceilMod(long, long)	added
clamp(double, double, double)	added
clamp(float, float, float)	added
clamp(long, int, int)	added
clamp(long, long, long)	added
divideExact(int, int)	added
divideExact(long, long)	added
floorDivExact(int, int)	added
floorDivExact(long, long)	added
unsignedMultiplyHigh(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
System
getSecurityManager()	+ deprecated + forRemoval
runFinalization()	+ deprecated + forRemoval
setSecurityManager(SecurityManager)	+ deprecated + forRemoval
ThreadDeath	+ deprecated + forRemoval
ThreadGroup
allowThreadSuspension(boolean)	removed
checkAccess()	+ deprecated + forRemoval
destroy()	+ deprecated + forRemoval
isDaemon()	+ deprecated + forRemoval
isDestroyed()	+ deprecated + forRemoval
setDaemon(boolean)	+ deprecated + forRemoval
stop()	+ forRemoval
Thread
checkAccess()	+ deprecated + forRemoval
getId()	+ deprecated
isVirtual()	added
join(Duration)	added
ofPlatform()	added
ofVirtual()	added
sleep(Duration)	added
startVirtualThread(Runnable)	added
stop()	+ forRemoval
threadId()	added
WrongThreadException	added
Character.UnicodeScript
CYPRO_MINOAN	added
KAWI	added
NAG_MUNDARI	added
OLD_UYGHUR	added
TANGSA	added
TOTO	added
VITHKUQI	added
StringTemplate.Processor.Linkage	added preview
StringTemplate.Processor	added preview
StringTemplate	added preview
Thread.Builder.OfPlatform	added
Thread.Builder.OfVirtual	added
Thread.Builder	added
java.math
BigDecimal
TWO	added
BigInteger
parallelMultiply(BigInteger)	added
java.net.spi
InetAddressResolver.LookupPolicy	added
InetAddressResolverProvider	added
InetAddressResolverProvider.Configuration	added
InetAddressResolver	added
java.net
DatagramSocket
joinGroup(SocketAddress, NetworkInterface)	added
leaveGroup(SocketAddress, NetworkInterface)	added
setDatagramSocketImplFactory(DatagramSocketImplFac...	+ deprecated
InetAddress	+ sealed
ServerSocket
setSocketFactory(SocketImplFactory)	+ deprecated
SocketException
SocketException(String, Throwable)	added
SocketException(Throwable)	added
Socket
setSocketImplFactory(SocketImplFactory)	+ deprecated
URLDecoder
URLDecoder()	removed
URL
URL(String)	+ deprecated
URL(String, String, String)	+ deprecated
URL(String, String, int, String)	+ deprecated
URL(String, String, int, String, URLStreamHandler)	+ deprecated
URL(URL, String)	+ deprecated
URL(URL, String, URLStreamHandler)	+ deprecated
of(URI, URLStreamHandler)	added
UnixDomainSocketAddress	added
StandardProtocolFamily
UNIX	added
java.nio.channels
FileChannel
map(FileChannel.MapMode, long, long, Arena)	added preview
java.nio.charset
Charset
forName(String, Charset)	added
java.nio.file.spi
FileSystemProvider
exists(Path, LinkOption...)	added
readAttributesIfExists(Path, Class, LinkOption...)	added
java.nio
Buffer	+ sealed
ByteBuffer	+ sealed
put(int, ByteBuffer, int, int)	added
CharBuffer	+ sealed
put(int, CharBuffer, int, int)	added
DoubleBuffer	+ sealed
put(int, DoubleBuffer, int, int)	added
FloatBuffer	+ sealed
put(int, FloatBuffer, int, int)	added
IntBuffer	+ sealed
put(int, IntBuffer, int, int)	added
LongBuffer	+ sealed
put(int, LongBuffer, int, int)	added
MappedByteBuffer	+ sealed
compact()	added
duplicate()	added
slice()	added
slice(int, int)	added
ShortBuffer	+ sealed
put(int, ShortBuffer, int, int)	added
java.security.cert
X509CRLSelector
addIssuerName(String)	+ deprecated
X509CRL
getIssuerDN()	+ deprecated
X509CertSelector
getIssuerAsString()	+ deprecated
getSubjectAsString()	+ deprecated
setIssuer(String)	+ deprecated
setSubject(String)	+ deprecated
X509Certificate
getIssuerDN()	+ deprecated
getSubjectDN()	+ deprecated
java.security.interfaces
DSAKeyPairGenerator
initialize(DSAParams, SecureRandom)	- throws InvalidParameterException
initialize(int, boolean, SecureRandom)	- throws InvalidParameterException
java.security.spec
MGF1ParameterSpec
SHA3_224	added
SHA3_256	added
SHA3_384	added
SHA3_512	added
toString()	added
PSSParameterSpec
DEFAULT	+ deprecated
PSSParameterSpec(int)	+ deprecated
java.security
AccessControlContext	+ deprecated + forRemoval
AccessControlException	+ deprecated + forRemoval
AccessController	+ deprecated + forRemoval
InvalidParameterException
InvalidParameterException(String, Throwable)	added
InvalidParameterException(Throwable)	added
KeyStoreSpi
engineGetAttributes(String)	added
KeyStore
getAttributes(String)	added
PolicySpi	+ deprecated + forRemoval
Policy	+ deprecated + forRemoval
DomainCombiner	+ deprecated + forRemoval
Policy.Parameters	+ deprecated + forRemoval
java.text
DecimalFormatSymbols
getLocale()	added
java.time.chrono
IsoChronology
isIsoBased()	added
JapaneseChronology
isIsoBased()	added
MinguoChronology
isIsoBased()	added
ThaiBuddhistChronology
isIsoBased()	added
Chronology
isIsoBased()	added
java.time.format
DateTimeFormatterBuilder
appendDayPeriodText(TextStyle)	added
appendLocalized(String)	added
getLocalizedDateTimePattern(String, Chronology,...	added
DateTimeFormatter
ofLocalizedPattern(String)	added
java.time
Clock	+ implements InstantSource
Duration
isPositive()	added
ZoneId	+ sealed
ZoneOffset
normalized()	added
InstantSource	added
java.util.concurrent
CompletableFuture
exceptionNow()	added
resultNow()	added
state()	added
ConcurrentHashMap.KeySetView	+ final
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)	added
newVirtualThreadPerTaskExecutor()	added
privilegedCallable(Callable)	+ deprecated + forRemoval
privilegedCallableUsingCurrentClassLoader(Callable...	+ deprecated + forRemoval
privilegedThreadFactory()	+ deprecated + forRemoval
ForkJoinPool
close()	added
externalSubmit(ForkJoinTask)	added
invokeAll(Collection, long, TimeUnit)	added
invokeAny(Collection)	added
invokeAny(Collection, long, TimeUnit)	added
lazySubmit(ForkJoinTask)	added
setParallelism(int)	added
ForkJoinTask
adaptInterruptible(Callable)	added
exceptionNow()	added
quietlyJoin(long, TimeUnit)	added
quietlyJoinUninterruptibly(long, TimeUnit)	added
resultNow()	added
state()	added
ForkJoinWorkerThread
ForkJoinWorkerThread(ThreadGroup, ForkJoinPool,...	added
getQueuedTaskCount()	added
FutureTask
exceptionNow()	added
resultNow()	added
state()	added
StructureViolationException	added preview
StructuredTaskScope.ShutdownOnFailure	added preview
StructuredTaskScope.ShutdownOnSuccess	added preview
StructuredTaskScope	added preview
ThreadLocalRandom	+ final
nextFloat(float)	added
nextFloat(float, float)	added
nextGaussian()	removed
ThreadPoolExecutor
finalize()	+ forRemoval
Future.State	added
StructuredTaskScope.Subtask.State	added preview
ExecutorService	+ implements AutoCloseable
close()	added
Future
exceptionNow()	added
resultNow()	added
state()	added
StructuredTaskScope.Subtask	added preview
java.util.random	added
java.util.regex
Matcher
hasMatch()	added
namedGroups()	added
Pattern
namedGroups()	added
splitWithDelimiters(CharSequence, int)	added
MatchResult
end(String)	added
group(String)	added
hasMatch()	added
namedGroups()	added
start(String)	added
java.util.spi
ToolProvider
description()	added
java.util.stream
DoubleStream.DoubleMapMultiConsumer	added
DoubleStream
mapMulti(DoubleStream.DoubleMapMultiConsumer)	added
IntStream.IntMapMultiConsumer	added
IntStream
mapMulti(IntStream.IntMapMultiConsumer)	added
LongStream.LongMapMultiConsumer	added
LongStream
mapMulti(LongStream.LongMapMultiConsumer)	added
Stream
mapMulti(BiConsumer)	added
mapMultiToDouble(BiConsumer)	added
mapMultiToInt(BiConsumer)	added
mapMultiToLong(BiConsumer)	added
toList()	added
java.util.zip
ZipInputStream
read()	added
readAllBytes()	added
readNBytes(byte[], int, int)	added
readNBytes(int)	added
skipNBytes(long)	added
transferTo(OutputStream)	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
EnumSet	+ sealed
FormatProcessor	added preview
HashMap
newHashMap(int)	added
HashSet
newHashSet(int)	added
HexFormat	added
IdentityHashMap
remove(Object, Object)	added
replace(Object, Object, Object)	added
IllegalFormatException	+ sealed
LinkedHashMap	- implements Map + implements SequencedMap
newLinkedHashMap(int)	added
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
newLinkedHashSet(int)	added
removeFirst()	added
removeLast()	added
reversed()	added
LinkedList
reversed()	added
Locale
Locale(String)	+ deprecated
Locale(String, String)	+ deprecated
Locale(String, String, String)	+ deprecated
availableLocales()	added
caseFoldLanguageTag(String)	added
of(String)	added
of(String, String)	added
of(String, String, String)	added
Objects
checkFromIndexSize(long, long, long)	added
checkFromToIndex(long, long, long)	added
checkIndex(long, long)	added
toIdentityString(Object)	added
Random	+ implements RandomGenerator
from(RandomGenerator)	added
SplittableRandom	+ implements RandomGenerator + implements RandomGenerator.SplittableGenerator
nextBoolean()	removed
nextDouble()	removed
nextDouble(double)	removed
nextDouble(double, double)	removed
nextInt(int)	removed
nextInt(int, int)	removed
nextLong(long)	removed
nextLong(long, long)	removed
split(RandomGenerator.SplittableGenerator)	added
splits()	added
splits(RandomGenerator.SplittableGenerator)	added
splits(long)	added
splits(long, RandomGenerator.SplittableGenerator)	added
TreeMap
putFirst(Object, Object)	added
putLast(Object, Object)	added
TreeSet
addFirst(Object)	added
addLast(Object)	added
WeakHashMap
newWeakHashMap(int)	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
Map.Entry
copyOf(Map.Entry)	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.spec
OAEPParameterSpec
DEFAULT	+ deprecated
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
SSLHandshakeException
SSLHandshakeException(String, Throwable)	added
SSLKeyException
SSLKeyException(String, Throwable)	added
SSLParameters
getNamedGroups()	added
getSignatureSchemes()	added
setNamedGroups(String[])	added
setSignatureSchemes(String[])	added
SSLPeerUnverifiedException
SSLPeerUnverifiedException(String, Throwable)	added
SSLProtocolException
SSLProtocolException(String, Throwable)	added
SSLSessionContext
setSessionCacheSize(int)	- throws IllegalArgumentException
setSessionTimeout(int)	- throws IllegalArgumentException
javax.security.auth
SubjectDomainCombiner	+ deprecated + forRemoval
Subject
callAs(Subject, Callable)	added
current()	added
doAs(Subject, PrivilegedAction)	+ deprecated + forRemoval
doAs(Subject, PrivilegedExceptionAction)	+ deprecated + forRemoval
doAsPrivileged(Subject, PrivilegedAction,...	+ deprecated + forRemoval
doAsPrivileged(Subject, PrivilegedExceptionAction,...	+ deprecated + forRemoval
getSubject(AccessControlContext)	+ deprecated + forRemoval
java.compiler
javax.annotation.processing
Messager
printError(CharSequence)	added
printError(CharSequence, Element)	added
printNote(CharSequence)	added
printNote(CharSequence, Element)	added
printWarning(CharSequence)	added
printWarning(CharSequence, Element)	added
javax.lang.model.element
ElementKind
BINDING_VARIABLE	- preview
RECORD	- preview
RECORD_COMPONENT	- preview
isDeclaredType()	added
isExecutable()	added
isInitializer()	added
isVariable()	added
Modifier
NON_SEALED	- preview
SEALED	- preview
ElementVisitor
visitRecordComponent(RecordComponentElement,...	- preview
ExecutableElement
getEnclosingElement()	added
RecordComponentElement	- preview
TypeElement
getPermittedSubclasses()	- preview
getRecordComponents()	- preview
isUnnamed()	added preview
VariableElement
isUnnamed()	added preview
javax.lang.model.util
AbstractElementVisitor14	- preview
ElementFilter
recordComponentsIn(Iterable)	- preview
recordComponentsIn(Set)	- preview
ElementKindVisitor14	- preview
ElementKindVisitor6
visitTypeAsRecord(TypeElement, Object)	- preview
ElementScanner14	- preview
SimpleElementVisitor14	- preview
Elements
getFileObjectOf(Element)	added
getOutermostTypeElement(Element)	added
isAutomaticModule(ModuleElement)	added
isCanonicalConstructor(ExecutableElement)	added
isCompactConstructor(ExecutableElement)	added
recordComponentFor(ExecutableElement)	- preview
javax.lang.model
SourceVersion
RELEASE_16	added
RELEASE_17	added
RELEASE_18	added
RELEASE_19	added
RELEASE_20	added
RELEASE_21	added
runtimeVersion()	added
valueOf(Runtime.Version)	added
javax.tools
ForwardingJavaFileManager
getFileForOutputForOriginatingFiles(JavaFileManage...	added
getJavaFileForOutputForOriginatingFiles(JavaFileMa...	added
ToolProvider
ToolProvider()	removed
DocumentationTool.Location
SNIPPET_PATH	added
JavaFileManager
getFileForOutputForOriginatingFiles(JavaFileManage...	added
getJavaFileForOutputForOriginatingFiles(JavaFileMa...	added
java.datatransfer
java.awt.datatransfer
DataFlavor
allHtmlFlavor	+ final
fragmentHtmlFlavor	+ final
selectionHtmlFlavor	+ final
java.desktop
java.applet
Applet	+ forRemoval
AppletContext	+ forRemoval
AppletStub	+ forRemoval
AudioClip	+ forRemoval
java.awt.color
ICC_ProfileGray	+ final
ICC_ProfileRGB	+ final
ICC_Profile	+ sealed
finalize()	removed
java.awt.desktop
AppEvent	+ sealed
FilesEvent	+ sealed
java.awt.dnd
DragSourceAdapter
DragSourceAdapter()	- public + protected
DropTargetAdapter
DropTargetAdapter()	- public + protected
DropTargetContext	+ final
java.awt.event
ComponentAdapter
ComponentAdapter()	- public + protected
ContainerAdapter
ContainerAdapter()	- public + protected
FocusAdapter
FocusAdapter()	- public + protected
HierarchyBoundsAdapter
HierarchyBoundsAdapter()	- public + protected
InputEvent	+ sealed
KeyAdapter
KeyAdapter()	- public + protected
MouseAdapter
MouseAdapter()	- public + protected
MouseMotionAdapter
MouseMotionAdapter()	- public + protected
WindowAdapter
WindowAdapter()	- public + protected
java.awt.font
GlyphVector
GlyphVector()	- public + protected
LayoutPath
LayoutPath()	- public + protected
LineMetrics
LineMetrics()	- public + protected
java.awt.geom
CubicCurve2D.Double
getBounds2D()	removed
CubicCurve2D.Float
getBounds2D()	removed
CubicCurve2D
getBounds2D()	added
Path2D	+ sealed
QuadCurve2D.Double
getBounds2D()	removed
QuadCurve2D.Float
getBounds2D()	removed
QuadCurve2D
getBounds2D()	added
java.awt.image
AbstractMultiResolutionImage
AbstractMultiResolutionImage()	- public + protected
BufferStrategy
BufferStrategy()	- public + protected
ColorModel
finalize()	removed
IndexColorModel
finalize()	removed
RGBImageFilter
RGBImageFilter()	- public + protected
VolatileImage
VolatileImage()	- public + protected
java.awt.peer
RobotPeer
useAbsoluteCoordinates()	added
java.awt
FocusTraversalPolicy
FocusTraversalPolicy()	- public + protected
Graphics
finalize()	+ forRemoval
GridBagLayoutInfo	+ final
Image
Image()	- public + protected
MultipleGradientPaint	+ sealed
PointerInfo	+ final
PrintJob
PrintJob()	- public + protected
finalize()	+ forRemoval
ScrollPaneAdjustable	+ final
TextComponent	+ sealed
Toolkit
Toolkit()	- public + protected
java.beans
Beans
instantiate(ClassLoader, String, BeanContext,...	+ forRemoval
PersistenceDelegate
PersistenceDelegate()	- public + protected
AppletInitializer	+ forRemoval
javax.accessibility
AccessibleContext
AccessibleContext()	- public + protected
AccessibleHyperlink
AccessibleHyperlink()	- public + protected
javax.imageio.spi
ServiceRegistry
finalize()	+ forRemoval
javax.imageio.stream
FileCacheImageInputStream
finalize()	+ forRemoval
FileImageInputStream
finalize()	+ forRemoval
FileImageOutputStream
finalize()	+ forRemoval
ImageInputStreamImpl
finalize()	+ forRemoval
MemoryCacheImageInputStream
finalize()	+ forRemoval
javax.print.event
PrintJobAdapter
PrintJobAdapter()	- public + protected
javax.print
PrintServiceLookup
PrintServiceLookup()	- public + protected
ServiceUIFactory
ServiceUIFactory()	- public + protected
StreamPrintServiceFactory
StreamPrintServiceFactory()	- public + protected
javax.sound.midi.spi
MidiDeviceProvider
MidiDeviceProvider()	- public + protected
MidiFileReader
MidiFileReader()	- public + protected
MidiFileWriter
MidiFileWriter()	- public + protected
SoundbankReader
SoundbankReader()	- public + protected
javax.sound.midi
Track	+ final
javax.sound.sampled.spi
AudioFileReader
AudioFileReader()	- public + protected
AudioFileWriter
AudioFileWriter()	- public + protected
FormatConversionProvider
FormatConversionProvider()	- public + protected
MixerProvider
MixerProvider()	- public + protected
javax.swing.border
AbstractBorder
AbstractBorder()	- public + protected
javax.swing.colorchooser
AbstractColorChooserPanel
AbstractColorChooserPanel()	- public + protected
javax.swing.event
InternalFrameAdapter
InternalFrameAdapter()	- public + protected
MouseInputAdapter
MouseInputAdapter()	- public + protected
javax.swing.filechooser
FileFilter
FileFilter()	- public + protected
FileSystemView
getSystemIcon(File, int, int)	added
FileView
FileView()	- public + protected
javax.swing.plaf.basic
BasicDirectoryModel
intervalAdded(ListDataEvent)	+ deprecated + forRemoval
intervalRemoved(ListDataEvent)	+ deprecated + forRemoval
lt(File, File)	+ deprecated + forRemoval
BasicLookAndFeel
BasicLookAndFeel()	- public + protected
BasicMenuItemUI.MouseInputHandler	+ deprecated + forRemoval
BasicRadioButtonUI
installListeners(AbstractButton)	removed
uninstallListeners(AbstractButton)	removed
BasicScrollPaneUI.HSBChangeListener	+ deprecated + forRemoval
BasicScrollPaneUI.PropertyChangeHandler	+ deprecated + forRemoval
BasicScrollPaneUI.VSBChangeListener	+ deprecated + forRemoval
BasicScrollPaneUI.ViewportChangeHandler	+ deprecated + forRemoval
BasicSliderUI
BasicSliderUI()	added
BasicSplitPaneUI.BasicHorizontalLayoutManager	+ sealed
BasicToolBarUI
createFloatingFrame(JToolBar)	+ deprecated + forRemoval
javax.swing.plaf.metal
MetalTheme
MetalTheme()	- public + protected
javax.swing.plaf.synth
SynthComboBoxUI
getMinimumSize(JComponent)	added
SynthDesktopIconUI
uninstallComponents()	added
SynthLookAndFeel
load(URL)	+ deprecated + forRemoval
SynthPainter
SynthPainter()	- public + protected
SynthPasswordFieldUI
installDefaults()	added
javax.swing.plaf
ButtonUI
ButtonUI()	- public + protected
ColorChooserUI
ColorChooserUI()	- public + protected
ComboBoxUI
ComboBoxUI()	- public + protected
DesktopIconUI
DesktopIconUI()	- public + protected
DesktopPaneUI
DesktopPaneUI()	- public + protected
FileChooserUI
FileChooserUI()	- public + protected
InternalFrameUI
InternalFrameUI()	- public + protected
LabelUI
LabelUI()	- public + protected
ListUI
ListUI()	- public + protected
MenuBarUI
MenuBarUI()	- public + protected
MenuItemUI
MenuItemUI()	- public + protected
OptionPaneUI
OptionPaneUI()	- public + protected
PanelUI
PanelUI()	- public + protected
PopupMenuUI
PopupMenuUI()	- public + protected
ProgressBarUI
ProgressBarUI()	- public + protected
RootPaneUI
RootPaneUI()	- public + protected
ScrollBarUI
ScrollBarUI()	- public + protected
ScrollPaneUI
ScrollPaneUI()	- public + protected
SeparatorUI
SeparatorUI()	- public + protected
SliderUI
SliderUI()	- public + protected
SpinnerUI
SpinnerUI()	- public + protected
SplitPaneUI
SplitPaneUI()	- public + protected
TabbedPaneUI
TabbedPaneUI()	- public + protected
TableHeaderUI
TableHeaderUI()	- public + protected
TableUI
TableUI()	- public + protected
TextUI
TextUI()	- public + protected
ToolBarUI
ToolBarUI()	- public + protected
ToolTipUI
ToolTipUI()	- public + protected
TreeUI
TreeUI()	- public + protected
ViewportUI
ViewportUI()	- public + protected
javax.swing.table
AbstractTableModel
AbstractTableModel()	- public + protected
TableStringConverter
TableStringConverter()	- public + protected
javax.swing.text.html
AccessibleHTML.HTMLAccessibleContext
setElementInfo(AccessibleHTML.ElementInfo)	added
FormSubmitEvent	+ final
HTMLDocument.Iterator
Iterator()	- public + protected
HTMLEditorKit.Parser
Parser()	- public + protected
StyleSheet.BoxPainter	+ final
StyleSheet.ListPainter	+ final
javax.swing.text
DefaultEditorKit
beginLineUpAction	added
endLineDownAction	added
DefaultTextUI
DefaultTextUI()	- public + protected
DocumentFilter.FilterBypass
FilterBypass()	- public + protected
GlyphView.GlyphPainter
GlyphPainter()	- public + protected
LayeredHighlighter.LayerPainter
LayerPainter()	- public + protected
LayeredHighlighter
LayeredHighlighter()	- public + protected
NavigationFilter.FilterBypass
FilterBypass()	- public + protected
StyleConstants.CharacterConstants	+ final
StyleConstants.ColorConstants	+ final
StyleConstants.FontConstants	+ final
StyleConstants.ParagraphConstants	+ final
StyleConstants	+ sealed
javax.swing.tree
AbstractLayoutCache.NodeDimensions
NodeDimensions()	- public + protected
AbstractLayoutCache
AbstractLayoutCache()	- public + protected
javax.swing
AbstractButton
AbstractButton()	- public + protected
AbstractCellEditor
AbstractCellEditor()	- public + protected
AbstractListModel
AbstractListModel()	- public + protected
AbstractSpinnerModel
AbstractSpinnerModel()	- public + protected
FocusManager
FocusManager()	- public + protected
GroupLayout.Group	+ sealed
GroupLayout.ParallelGroup	+ sealed
GroupLayout.SequentialGroup	+ final
InputVerifier
InputVerifier()	- public + protected
InternalFrameFocusTraversalPolicy
InternalFrameFocusTraversalPolicy()	- public + protected
JApplet	+ forRemoval
JFormattedTextField.AbstractFormatterFactory
AbstractFormatterFactory()	- public + protected
JFormattedTextField.AbstractFormatter
AbstractFormatter()	- public + protected
JPasswordField
setText(String)	added
JSlider.AccessibleJSlider	+ implements AccessibleAction + implements ChangeListener
doAccessibleAction(int)	added
getAccessibleAction()	added
getAccessibleActionCount()	added
getAccessibleActionDescription(int)	added
stateChanged(ChangeEvent)	added
LookAndFeel
LookAndFeel()	- public + protected
RepaintManager
addDirtyRegion(Applet, int, int, int, int)	+ forRemoval
RowFilter
RowFilter()	- public + protected
ToolTipManager	+ final
java.logging
java.util.logging
LogManager
checkAccess()	+ deprecated + forRemoval
LogRecord
getLongThreadID()	added
getThreadID()	+ deprecated
setLongThreadID(long)	added
setThreadID(int)	+ deprecated
java.management.rmi
javax.management.remote.rmi
RMIIIOPServerImpl	removed
java.management
java.lang.management
MemoryMXBean
getObjectPendingFinalizationCount()	+ deprecated
javax.management.loading
MLetContent	+ deprecated + forRemoval
MLet	+ deprecated + forRemoval
PrivateMLet	+ deprecated + forRemoval
MLetMBean	+ deprecated + forRemoval
javax.management.relation
RoleStatus
RoleStatus()	+ deprecated + forRemoval
javax.management.remote
JMXConnector
getMBeanServerConnection(Subject)	+ deprecated + forRemoval
java.naming
javax.naming
Context
APPLET	+ forRemoval
java.net.http
java.net.http
HttpClient	+ implements AutoCloseable
awaitTermination(Duration)	added
close()	added
isTerminated()	added
shutdown()	added
shutdownNow()	added
HttpRequest.BodyPublishers
concat(HttpRequest.BodyPublisher...)	added
HttpRequest
newBuilder(HttpRequest, BiPredicate)	added
HttpClient.Builder
localAddress(InetAddress)	added
HttpRequest.Builder
HEAD()	added
java.rmi
java.rmi.activation	removed
java.rmi
RMISecurityManager	+ forRemoval
java.xml.crypto
javax.xml.crypto.dsig.spec
RSAPSSParameterSpec	added
javax.xml.crypto.dsig
SignatureMethod
ED25519	added
ED448	added
RSA_PSS	added
java.xml
javax.xml.xpath
XPathFactory
getProperty(String)	added
setProperty(String, String)	added

Data Source

This report is based on simple comparison of all public and protected APIs of the java.* and javax.* packages of JDK builds 21.0.2+13-LTS-tem and 15.0.2+7-adpt. 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.