New APIs in Java 15

Comparing Java 15 (15.0.2+7-adpt) with Java 12 (12.0.2+10-adpt).

Element	Modification
java.base
java.io
Serial	added
PrintStream
write(byte[])	added
writeBytes(byte[])	added
java.lang.annotation
ElementType
RECORD_COMPONENT	added preview
java.lang.constant
ConstantDescs
BSM_EXPLICIT_CAST	added
BSM_GET_STATIC_FINAL	added
FALSE	added
TRUE	added
java.lang.invoke
ClassSpecializer.Factory
Factory(ClassSpecializer)	removed
ConstantBootstraps
ConstantBootstraps()	removed
explicitCast(MethodHandles.Lookup, String, Class,...	added
MethodHandles.Lookup
defineHiddenClass(byte[], boolean,...	added
ensureInitialized(Class)	added
hasFullPrivilegeAccess()	added
hasPrivateAccess()	+ deprecated
previousLookupClass()	added
VarHandle
coordinateTypes()	- final
toMethodHandle(VarHandle.AccessMode)	- final
varType()	- final
MethodHandles.Lookup.ClassOption	added
java.lang.reflect
Modifier
Modifier()	removed
RecordComponent	added preview
AnnotatedType
getAnnotation(Class)	added
getAnnotations()	added
getDeclaredAnnotations()	added
java.lang.runtime	added
java.lang
Boolean	+ implements Constable
describeConstable()	added
Byte	+ implements Constable
describeConstable()	added
Character.UnicodeBlock
CHORASMIAN	added
CJK_UNIFIED_IDEOGRAPHS_EXTENSION_G	added
DIVES_AKURU	added
EGYPTIAN_HIEROGLYPH_FORMAT_CONTROLS	added
ELYMAIC	added
KHITAN_SMALL_SCRIPT	added
LISU_SUPPLEMENT	added
NANDINAGARI	added
NYIAKENG_PUACHUE_HMONG	added
OTTOMAN_SIYAQ_NUMBERS	added
SMALL_KANA_EXTENSION	added
SYMBOLS_AND_PICTOGRAPHS_EXTENDED_A	added
SYMBOLS_FOR_LEGACY_COMPUTING	added
TAMIL_SUPPLEMENT	added
TANGUT_SUPPLEMENT	added
WANCHO	added
YEZIDI	added
Character	+ implements Constable
describeConstable()	added
Class
getRecordComponents()	added preview
isHidden()	added
isRecord()	added preview
isSealed()	added preview
permittedSubclasses()	added preview
LiveStackFrame.PrimitiveSlot
PrimitiveSlot()	removed
Math
absExact(int)	added
absExact(long)	added
NullPointerException
fillInStackTrace()	added
getMessage()	added
Record	added preview
Runtime
traceInstructions(boolean)	removed
traceMethodCalls(boolean)	removed
Short	+ implements Constable
describeConstable()	added
StrictMath
absExact(int)	added
absExact(long)	added
decrementExact(int)	added
decrementExact(long)	added
incrementExact(int)	added
incrementExact(long)	added
negateExact(int)	added
negateExact(long)	added
String
formatted(Object...)	added
stripIndent()	added
translateEscapes()	added
ThreadGroup
allowThreadSuspension(boolean)	+ forRemoval
resume()	+ forRemoval
suspend()	+ forRemoval
Thread
resume()	+ forRemoval
suspend()	+ forRemoval
Character.UnicodeScript
CHORASMIAN	added
DIVES_AKURU	added
ELYMAIC	added
KHITAN_SMALL_SCRIPT	added
NANDINAGARI	added
NYIAKENG_PUACHUE_HMONG	added
WANCHO	added
YEZIDI	added
CharSequence
isEmpty()	added
java.net
MulticastSocket
getInterface()	+ deprecated
getLoopbackMode()	+ deprecated
joinGroup(InetAddress)	+ deprecated
leaveGroup(InetAddress)	+ deprecated
setInterface(InetAddress)	+ deprecated
setLoopbackMode(boolean)	+ deprecated
supportedOptions()	removed
java.nio.channels.spi
SelectorProvider
openServerSocketChannel(ProtocolFamily)	added
openSocketChannel(ProtocolFamily)	added
java.nio.channels
ServerSocketChannel
open(ProtocolFamily)	added
SocketChannel
open(ProtocolFamily)	added
java.nio.file
FileSystems
newFileSystem(Path)	added
newFileSystem(Path, Map)	added
newFileSystem(Path, Map, ClassLoader)	added
java.nio
Buffer
slice(int, int)	added
ByteBuffer
get(int, byte[])	added
get(int, byte[], int, int)	added
put(int, byte[])	added
put(int, byte[], int, int)	added
slice(int, int)	added
CharBuffer
get(int, char[])	added
get(int, char[], int, int)	added
isEmpty()	added
put(int, char[])	added
put(int, char[], int, int)	added
slice(int, int)	added
DoubleBuffer
get(int, double[])	added
get(int, double[], int, int)	added
put(int, double[])	added
put(int, double[], int, int)	added
slice(int, int)	added
FloatBuffer
get(int, float[])	added
get(int, float[], int, int)	added
put(int, float[])	added
put(int, float[], int, int)	added
slice(int, int)	added
IntBuffer
get(int, int[])	added
get(int, int[], int, int)	added
put(int, int[])	added
put(int, int[], int, int)	added
slice(int, int)	added
LongBuffer
get(int, long[])	added
get(int, long[], int, int)	added
put(int, long[])	added
put(int, long[], int, int)	added
slice(int, int)	added
MappedByteBuffer
force(int, int)	added
ShortBuffer
get(int, short[])	added
get(int, short[], int, int)	added
put(int, short[])	added
put(int, short[], int, int)	added
slice(int, int)	added
java.security.acl	removed
java.security.interfaces
EdECKey	added
EdECPrivateKey	added
EdECPublicKey	added
java.security.spec
EdDSAParameterSpec	added
EdECPoint	added
EdECPrivateKeySpec	added
EdECPublicKeySpec	added
NamedParameterSpec
ED25519	added
ED448	added
java.text
CompactNumberFormat
CompactNumberFormat(String, DecimalFormatSymbols,...	added
DecimalFormatSymbols
getMonetaryGroupingSeparator()	added
setMonetaryGroupingSeparator(char)	added
java.time.chrono
JapaneseEra
REIWA	added
java.util.concurrent.locks
AbstractQueuedLongSynchronizer
AbstractQueuedLongSynchronizer()	- protected + public
LockSupport
setCurrentBlocker(Object)	added
java.util.jar
Pack200	removed
Pack200.Packer	removed
Pack200.Unpacker	removed
java.util
HashSet
toArray()	added
toArray(Object[])	added
NoSuchElementException
NoSuchElementException(String, Throwable)	added
NoSuchElementException(Throwable)	added
TreeMap
compute(Object, BiFunction)	added
computeIfAbsent(Object, Function)	added
computeIfPresent(Object, BiFunction)	added
merge(Object, Object, BiFunction)	added
putIfAbsent(Object, Object)	added
javax.net.ssl
HandshakeCompletedEvent
getPeerCertificateChain()	+ forRemoval
SSLSession
getPeerCertificateChain()	- abstract + forRemoval
javax.security.cert
CertificateEncodingException	+ forRemoval
CertificateException	+ forRemoval
CertificateExpiredException	+ forRemoval
CertificateNotYetValidException	+ forRemoval
CertificateParsingException	+ forRemoval
Certificate	+ forRemoval
X509Certificate	+ forRemoval
java.compiler
javax.annotation.processing
ProcessingEnvironment
isPreviewEnabled()	added
javax.lang.model.element
ElementKind
BINDING_VARIABLE	added preview
RECORD	added preview
RECORD_COMPONENT	added preview
Modifier	- final
NON_SEALED	added preview
SEALED	added preview
ElementVisitor
visitRecordComponent(RecordComponentElement,...	added preview
Element
getAnnotationsByType(Class)	added
ExecutableElement
asType()	added
ModuleElement
asType()	added
PackageElement
asType()	added
RecordComponentElement	added preview
TypeElement
asType()	added
getPermittedSubclasses()	added preview
getRecordComponents()	added preview
TypeParameterElement
asType()	added
VariableElement
asType()	added
javax.lang.model.type
TypeMirror
getAnnotation(Class)	added
getAnnotationMirrors()	added
getAnnotationsByType(Class)	added
javax.lang.model.util
AbstractAnnotationValueVisitor14	added
AbstractElementVisitor14	added preview
AbstractElementVisitor6
visitRecordComponent(RecordComponentElement,...	added
AbstractTypeVisitor14	added
ElementFilter
recordComponentsIn(Iterable)	added preview
recordComponentsIn(Set)	added preview
ElementKindVisitor14	added preview
ElementKindVisitor6
visitTypeAsRecord(TypeElement, Object)	added preview
visitVariableAsBindingVariable(VariableElement,...	added
ElementScanner14	added preview
SimpleAnnotationValueVisitor14	added
SimpleElementVisitor14	added preview
SimpleTypeVisitor14	added
TypeKindVisitor14	added
Elements
recordComponentFor(ExecutableElement)	added preview
javax.lang.model
SourceVersion
RELEASE_13	added
RELEASE_14	added
RELEASE_15	added
javax.tools
ToolProvider
ToolProvider()	+ deprecated + forRemoval
StandardJavaFileManager
getJavaFileObjectsFromPaths(Collection)	added
getJavaFileObjectsFromPaths(Iterable)	+ deprecated
java.desktop
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
java.management.rmi
javax.management.remote.rmi
RMIConnectorServer
CREDENTIAL_TYPES	removed
java.rmi
java.rmi.activation
Activatable	+ deprecated + forRemoval
ActivateFailedException	+ deprecated + forRemoval
ActivationDesc	+ deprecated + forRemoval
ActivationException	+ deprecated + forRemoval
ActivationGroupDesc	+ deprecated + forRemoval
ActivationGroupID	+ deprecated + forRemoval
ActivationGroup	+ deprecated + forRemoval
ActivationGroup_Stub	+ deprecated + forRemoval
ActivationID	+ deprecated + forRemoval
UnknownGroupException	+ deprecated + forRemoval
UnknownObjectException	+ deprecated + forRemoval
ActivationInstantiator	+ deprecated + forRemoval
ActivationMonitor	+ deprecated + forRemoval
ActivationSystem	+ deprecated + forRemoval
Activator	+ deprecated + 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
CanonicalizationMethod
INCLUSIVE_11	added
INCLUSIVE_11_WITH_COMMENTS	added
java.xml
javax.xml.parsers
DocumentBuilderFactory
newDefaultNSInstance()	added
newNSInstance()	added
newNSInstance(String, ClassLoader)	added
SAXParserFactory
newDefaultNSInstance()	added
newNSInstance()	added
newNSInstance(String, ClassLoader)	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 15.0.2+7-adpt 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.