New APIs in Java 21

Comparing Java 21 (21.0.2+13-LTS-tem) with Java 12 (12.0.2+10-adpt).

Element	Modification
java.base
java.io
Serial	added
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
write(byte[])	added
writeBytes(byte[])	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	added
java.lang.constant
ConstantDescs
BSM_CLASS_DATA	added
BSM_CLASS_DATA_AT	added
BSM_EXPLICIT_CAST	added
BSM_GET_STATIC_FINAL	added
CLASS_INIT_NAME	added
FALSE	added
INIT_NAME	added
MTD_void	added
TRUE	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
ConstantBootstraps
ConstantBootstraps()	removed
explicitCast(MethodHandles.Lookup, String, Class,...	added
MethodHandle	+ sealed
asType(MethodType)	+ final
MethodHandles.Lookup
ORIGINAL	added
defineHiddenClass(byte[], boolean,...	added
defineHiddenClassWithClassData(byte[], Object,...	added
ensureInitialized(Class)	added
hasFullPrivilegeAccess()	added
hasPrivateAccess()	+ deprecated
previousLookupClass()	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
coordinateTypes()	- final
hasInvokeExactBehavior()	added
isAccessModeSupported(VarHandle.AccessMode)	- final
toMethodHandle(VarHandle.AccessMode)	- final
varType()	- final
withInvokeBehavior()	added
withInvokeExactBehavior()	added
MethodHandles.Lookup.ClassOption	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
Modifier
Modifier()	removed
Parameter
accessFlags()	added
RecordComponent	added
AccessFlag.Location	added
AccessFlag	added
ClassFileFormatVersion	added
AnnotatedType
getAnnotation(Class)	added
getAnnotations()	added
getDeclaredAnnotations()	added
InvocationHandler
invokeDefault(Object, Method, Object...)	added
Member
accessFlags()	added
java.lang.runtime	added
java.lang
Boolean	+ implements Constable
Boolean(String)	+ forRemoval
Boolean(boolean)	+ forRemoval
describeConstable()	added
Byte	+ implements Constable
Byte(String)	+ forRemoval
Byte(byte)	+ forRemoval
describeConstable()	added
Character.UnicodeBlock
ARABIC_EXTENDED_B	added
ARABIC_EXTENDED_C	added
CHORASMIAN	added
CJK_UNIFIED_IDEOGRAPHS_EXTENSION_G	added
CJK_UNIFIED_IDEOGRAPHS_EXTENSION_H	added
CYPRO_MINOAN	added
CYRILLIC_EXTENDED_D	added
DEVANAGARI_EXTENDED_A	added
DIVES_AKURU	added
EGYPTIAN_HIEROGLYPH_FORMAT_CONTROLS	added
ELYMAIC	added
ETHIOPIC_EXTENDED_B	added
KAKTOVIK_NUMERALS	added
KANA_EXTENDED_B	added
KAWI	added
KHITAN_SMALL_SCRIPT	added
LATIN_EXTENDED_F	added
LATIN_EXTENDED_G	added
LISU_SUPPLEMENT	added
NAG_MUNDARI	added
NANDINAGARI	added
NYIAKENG_PUACHUE_HMONG	added
OLD_UYGHUR	added
OTTOMAN_SIYAQ_NUMBERS	added
SMALL_KANA_EXTENSION	added
SYMBOLS_AND_PICTOGRAPHS_EXTENDED_A	added
SYMBOLS_FOR_LEGACY_COMPUTING	added
TAMIL_SUPPLEMENT	added
TANGSA	added
TANGUT_SUPPLEMENT	added
TOTO	added
UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS_EXTENDED_A	added
VITHKUQI	added
WANCHO	added
YEZIDI	added
ZNAMENNY_MUSICAL_NOTATION	added
Character	+ implements Constable
Character(char)	+ forRemoval
describeConstable()	added
isEmoji(int)	added
isEmojiComponent(int)	added
isEmojiModifier(int)	added
isEmojiModifierBase(int)	added
isEmojiPresentation(int)	added
isExtendedPictographic(int)	added
Class
accessFlags()	added
getPermittedSubclasses()	added
getRecordComponents()	added
isHidden()	added
isRecord()	added
isSealed()	added
isUnnamedClass()	added 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
LiveStackFrame.PrimitiveSlot
PrimitiveSlot()	removed
Long
Long(String)	+ forRemoval
Long(long)	+ forRemoval
compress(long, long)	added
expand(long, long)	added
MatchException	added
Math
TAU	added
absExact(int)	added
absExact(long)	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
NullPointerException
fillInStackTrace()	added
getMessage()	added
Object
finalize()	+ forRemoval
Process
errorReader()	added
errorReader(Charset)	added
inputReader()	added
inputReader(Charset)	added
outputWriter()	added
outputWriter(Charset)	added
Record	added
Runtime
exec(String)	+ deprecated
exec(String, String[])	+ deprecated
exec(String, String[], File)	+ deprecated
runFinalization()	+ deprecated + forRemoval
traceInstructions(boolean)	removed
traceMethodCalls(boolean)	removed
ScopedValue.Carrier	added preview
ScopedValue	added preview
SecurityManager	+ deprecated + forRemoval
checkMulticast(InetAddress, byte)	+ forRemoval
Short	+ implements Constable
Short(String)	+ forRemoval
Short(short)	+ forRemoval
describeConstable()	added
StrictMath
TAU	added
absExact(int)	added
absExact(long)	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
decrementExact(int)	added
decrementExact(long)	added
divideExact(int, int)	added
divideExact(long, long)	added
floorDivExact(int, int)	added
floorDivExact(long, long)	added
incrementExact(int)	added
incrementExact(long)	added
negateExact(int)	added
negateExact(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
formatted(Object...)	added
indexOf(String, int, int)	added
indexOf(int, int, int)	added
splitWithDelimiters(String, int)	added
stripIndent()	added
translateEscapes()	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
resume()	+ forRemoval
setDaemon(boolean)	+ deprecated + forRemoval
stop()	+ forRemoval
suspend()	+ forRemoval
Thread
checkAccess()	+ deprecated + forRemoval
getId()	+ deprecated
isVirtual()	added
join(Duration)	added
ofPlatform()	added
ofVirtual()	added
resume()	+ forRemoval
sleep(Duration)	added
startVirtualThread(Runnable)	added
stop()	+ forRemoval
suspend()	+ forRemoval
threadId()	added
WrongThreadException	added
Character.UnicodeScript
CHORASMIAN	added
CYPRO_MINOAN	added
DIVES_AKURU	added
ELYMAIC	added
KAWI	added
KHITAN_SMALL_SCRIPT	added
NAG_MUNDARI	added
NANDINAGARI	added
NYIAKENG_PUACHUE_HMONG	added
OLD_UYGHUR	added
TANGSA	added
TOTO	added
VITHKUQI	added
WANCHO	added
YEZIDI	added
CharSequence
isEmpty()	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
MulticastSocket
getInterface()	+ deprecated
getLoopbackMode()	+ deprecated
joinGroup(InetAddress)	+ deprecated
leaveGroup(InetAddress)	+ deprecated
setInterface(InetAddress)	+ deprecated
setLoopbackMode(boolean)	+ deprecated
supportedOptions()	removed
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.spi
SelectorProvider
openServerSocketChannel(ProtocolFamily)	added
openSocketChannel(ProtocolFamily)	added
java.nio.channels
FileChannel
map(FileChannel.MapMode, long, long, Arena)	added preview
ServerSocketChannel
open(ProtocolFamily)	added
SocketChannel
open(ProtocolFamily)	added
java.nio.charset
Charset
forName(String, Charset)	added
java.nio.file.spi
FileSystemProvider
exists(Path, LinkOption...)	added
readAttributesIfExists(Path, Class, LinkOption...)	added
java.nio.file
FileSystems
newFileSystem(Path)	added
newFileSystem(Path, Map)	added
newFileSystem(Path, Map, ClassLoader)	added
java.nio
Buffer	+ sealed
slice(int, int)	added
ByteBuffer	+ sealed
get(int, byte[])	added
get(int, byte[], int, int)	added
put(int, ByteBuffer, int, int)	added
put(int, byte[])	added
put(int, byte[], int, int)	added
slice(int, int)	added
CharBuffer	+ sealed
get(int, char[])	added
get(int, char[], int, int)	added
isEmpty()	added
put(int, CharBuffer, int, int)	added
put(int, char[])	added
put(int, char[], int, int)	added
slice(int, int)	added
DoubleBuffer	+ sealed
get(int, double[])	added
get(int, double[], int, int)	added
put(int, DoubleBuffer, int, int)	added
put(int, double[])	added
put(int, double[], int, int)	added
slice(int, int)	added
FloatBuffer	+ sealed
get(int, float[])	added
get(int, float[], int, int)	added
put(int, FloatBuffer, int, int)	added
put(int, float[])	added
put(int, float[], int, int)	added
slice(int, int)	added
IntBuffer	+ sealed
get(int, int[])	added
get(int, int[], int, int)	added
put(int, IntBuffer, int, int)	added
put(int, int[])	added
put(int, int[], int, int)	added
slice(int, int)	added
LongBuffer	+ sealed
get(int, long[])	added
get(int, long[], int, int)	added
put(int, LongBuffer, int, int)	added
put(int, long[])	added
put(int, long[], int, int)	added
slice(int, int)	added
MappedByteBuffer	+ sealed
compact()	added
duplicate()	added
force(int, int)	added
slice()	added
slice(int, int)	added
ShortBuffer	+ sealed
get(int, short[])	added
get(int, short[], int, int)	added
put(int, ShortBuffer, int, int)	added
put(int, short[])	added
put(int, short[], int, int)	added
slice(int, int)	added
java.security.acl	removed
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
EdECKey	added
EdECPrivateKey	added
EdECPublicKey	added
java.security.spec
EdDSAParameterSpec	added
EdECPoint	added
EdECPrivateKeySpec	added
EdECPublicKeySpec	added
MGF1ParameterSpec
SHA3_224	added
SHA3_256	added
SHA3_384	added
SHA3_512	added
toString()	added
NamedParameterSpec
ED25519	added
ED448	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
CompactNumberFormat
CompactNumberFormat(String, DecimalFormatSymbols,...	added
DecimalFormatSymbols
getLocale()	added
getMonetaryGroupingSeparator()	added
setMonetaryGroupingSeparator(char)	added
java.time.chrono
IsoChronology
isIsoBased()	added
JapaneseChronology
isIsoBased()	added
JapaneseEra
REIWA	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.locks
AbstractQueuedLongSynchronizer
AbstractQueuedLongSynchronizer()	- protected + public
LockSupport
setCurrentBlocker(Object)	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.jar
Pack200	removed
Pack200.Packer	removed
Pack200.Unpacker	removed
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
toArray()	added
toArray(Object[])	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
NoSuchElementException
NoSuchElementException(String, Throwable)	added
NoSuchElementException(Throwable)	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
compute(Object, BiFunction)	added
computeIfAbsent(Object, Function)	added
computeIfPresent(Object, BiFunction)	added
merge(Object, Object, BiFunction)	added
putFirst(Object, Object)	added
putIfAbsent(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
HandshakeCompletedEvent
getPeerCertificateChain()	+ forRemoval
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
SSLSession
getPeerCertificateChain()	- abstract + forRemoval
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
javax.security.cert
CertificateEncodingException	+ forRemoval
CertificateException	+ forRemoval
CertificateExpiredException	+ forRemoval
CertificateNotYetValidException	+ forRemoval
CertificateParsingException	+ forRemoval
Certificate	+ forRemoval
X509Certificate	+ 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
ProcessingEnvironment
isPreviewEnabled()	added
javax.lang.model.element
ElementKind
BINDING_VARIABLE	added
RECORD	added
RECORD_COMPONENT	added
isDeclaredType()	added
isExecutable()	added
isInitializer()	added
isVariable()	added
Modifier	- final
NON_SEALED	added
SEALED	added
ElementVisitor
visitRecordComponent(RecordComponentElement,...	added
Element
getAnnotationsByType(Class)	added
ExecutableElement
asType()	added
getEnclosingElement()	added
ModuleElement
asType()	added
PackageElement
asType()	added
RecordComponentElement	added
TypeElement
asType()	added
getPermittedSubclasses()	added
getRecordComponents()	added
isUnnamed()	added preview
TypeParameterElement
asType()	added
VariableElement
asType()	added
isUnnamed()	added preview
javax.lang.model.type
TypeMirror
getAnnotation(Class)	added
getAnnotationMirrors()	added
getAnnotationsByType(Class)	added
javax.lang.model.util
AbstractAnnotationValueVisitor14	added
AbstractElementVisitor14	added
AbstractElementVisitor6
visitRecordComponent(RecordComponentElement,...	added
AbstractTypeVisitor14	added
ElementFilter
recordComponentsIn(Iterable)	added
recordComponentsIn(Set)	added
ElementKindVisitor14	added
ElementKindVisitor6
visitTypeAsRecord(TypeElement, Object)	added
visitVariableAsBindingVariable(VariableElement,...	added
ElementScanner14	added
SimpleAnnotationValueVisitor14	added
SimpleElementVisitor14	added
SimpleTypeVisitor14	added
TypeKindVisitor14	added
Elements
getFileObjectOf(Element)	added
getOutermostTypeElement(Element)	added
isAutomaticModule(ModuleElement)	added
isCanonicalConstructor(ExecutableElement)	added
isCompactConstructor(ExecutableElement)	added
recordComponentFor(ExecutableElement)	added
javax.lang.model
SourceVersion
RELEASE_13	added
RELEASE_14	added
RELEASE_15	added
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
StandardJavaFileManager
getJavaFileObjectsFromPaths(Collection)	added
getJavaFileObjectsFromPaths(Iterable)	+ deprecated
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
ComponentPeer
checkImage(Image, int, int, ImageObserver)	removed
createImage(ImageProducer)	removed
prepareImage(Image, int, int, ImageObserver)	removed
MenuPeer
addSeparator()	removed
RobotPeer
dispose()	removed
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
RMIConnectorServer
CREDENTIAL_TYPES	removed
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.security.jgss
javax.security.auth.kerberos
KerberosPrincipal
KRB_NT_ENTERPRISE	added
java.xml.crypto
javax.xml.crypto.dsig.keyinfo
KeyValue
EC_TYPE	added
javax.xml.crypto.dsig.spec
RSAPSSParameterSpec	added
javax.xml.crypto.dsig
CanonicalizationMethod
INCLUSIVE_11	added
INCLUSIVE_11_WITH_COMMENTS	added
SignatureMethod
ED25519	added
ED448	added
RSA_PSS	added
java.xml
javax.xml.parsers
DocumentBuilderFactory
newDefaultNSInstance()	added
newNSInstance()	added
newNSInstance(String, ClassLoader)	added
SAXParserFactory
newDefaultNSInstance()	added
newNSInstance()	added
newNSInstance(String, ClassLoader)	added
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 12.0.2+10-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.