New APIs in Java 28

Comparing Java 28 (28-ea+21-1707-open) with Java 26 (26.0.2.1+1-tem).

Element	Modification
java.base
java.lang.classfile.attribute
LoadableDescriptorsAttribute	added preview
StackMapFrameInfo
of(Label, List, List, List)	added preview
unsetFields()	added preview
java.lang.classfile.instruction
IncrementInstruction
of(Opcode, int, int)	added
java.lang.classfile
Attributes
NAME_LOADABLE_DESCRIPTORS	added preview
loadableDescriptors()	added preview
ClassFile
ACC_IDENTITY	added preview
ACC_STRICT_INIT	added preview
JAVA_27_VERSION	added
JAVA_28_VERSION	added
java.lang.constant
DynamicCallSiteDesc	+ implements ConstantDescs.CallSiteBootstrapMethodHook
bootstrapMethod()	added
bootstrapMethod()	removed
ConstantDescs.CallSiteBootstrapMethodHook	added
java.lang.foreign
MemorySegment
copy(String, Charset, int, MemorySegment, long,...	added
getString(long, Charset, long)	added
SegmentAllocator
allocateFrom(String, Charset, int, int)	added
java.lang.invoke
MethodHandles
synchronize(MethodHandle)	added
java.lang.reflect
Executable
toGenericString()	- abstract
Field
isStrictInit()	added preview
Modifier
classModifiers()	+ deprecated
constructorModifiers()	+ deprecated
fieldModifiers()	+ deprecated
interfaceModifiers()	+ deprecated
methodModifiers()	+ deprecated
parameterModifiers()	+ deprecated
toString(int)	+ deprecated
AccessFlag
IDENTITY	added preview
STRICT_INIT	added preview
ClassFileFormatVersion
RELEASE_27	added
RELEASE_28	added
java.lang
Class
isValue()	added preview
IdentityException	added preview
Math
acosh(double)	added
asinh(double)	added
atanh(double)	added
StrictMath
acosh(double)	added
asinh(double)	added
atanh(double)	added
String
codePointCount()	added
encodedLength(Charset)	added
LazyConstant
isInitialized()	removed preview
orElse(Object)	removed preview
java.math
BigDecimal
rootn(int, MathContext)	added
java.security.cert
X509CRL	- implements DEREncodable + implements BinaryEncodable
X509Certificate	- implements DEREncodable + implements BinaryEncodable
java.security.spec
PKCS8EncodedKeySpec	- implements DEREncodable + implements BinaryEncodable
X509EncodedKeySpec	- implements DEREncodable + implements BinaryEncodable
java.security
KeyPair	- implements DEREncodable + implements BinaryEncodable
KeyStoreSpi
engineGetCreationInstant(String)	added
KeyStore
getCreationInstant(String)	added
PEMDecoder	- preview
decode(InputStream)	added
decode(InputStream)	removed preview
decode(InputStream, Class)	added
decode(InputStream, Class)	removed preview
decode(String)	added
decode(String)	removed preview
decode(String, Class)	added
decode(String, Class)	removed preview
withFactoriesOf(Provider)	added
withFactory(Provider)	removed preview
PEMEncoder	- preview
encode(BinaryEncodable)	added
encode(DEREncodable)	removed preview
encodeToString(BinaryEncodable)	added
encodeToString(DEREncodable)	removed preview
PEM	- extends Record - implements DEREncodable - preview + extends Object + implements BinaryEncodable
PEM(String, byte[])	added
PEM(String, byte[], byte[])	added
content()	added
content()	removed preview
decode()	- final
equals(Object)	removed preview
hashCode()	removed preview
toString()	- final
AsymmetricKey	- implements DEREncodable + implements BinaryEncodable
BinaryEncodable	added
DEREncodable	removed preview
java.time.format
DateTimeFormatterPatternProvider	added
java.util.concurrent
StructureViolationException	- preview
StructuredTaskScope.CancelledByTimeoutException	added
StructuredTaskScope.FailedException	removed preview
StructuredTaskScope.TimeoutException	removed preview
ThreadPoolExecutor
finalize()	removed
StructuredTaskScope.Subtask.State	- preview
StructuredTaskScope.Configuration	- preview
StructuredTaskScope.Joiner	- preview
allSuccessfulOrThrow(Function)	added
anySuccessfulOrThrow(Function)	added
awaitAll()	removed preview
awaitAllSuccessfulOrThrow(Function)	added
onTimeout()	removed preview
timeout()	added
StructuredTaskScope.Subtask	- preview
StructuredTaskScope	- preview
join()	+ throws Throwable
open(UnaryOperator)	added
java.util
EnumSet
spliterator()	added
Locale
getDisplayCountry()	- final
getDisplayLanguage()	- final
getDisplayName()	- final
getDisplayVariant()	- final
Objects
hasIdentity(Object)	added preview
requireIdentity(Object)	added preview
requireIdentity(Object, String)	added preview
requireIdentity(Object, Supplier)	added preview
PriorityQueue
PriorityQueue(Collection, Comparator)	added
Set
ofLazy(Set, Predicate)	added preview
javax.crypto
CryptoException	added
EncryptedPrivateKeyInfo	- implements DEREncodable + implements BinaryEncodable
encrypt(BinaryEncodable, Key, String,...	added
encrypt(BinaryEncodable, char[])	added
encrypt(BinaryEncodable, char[], String,...	added
encrypt(DEREncodable, Key, String,...	removed preview
encrypt(DEREncodable, char[])	removed preview
encrypt(DEREncodable, char[], String,...	removed preview
getKey(Key)	added
getKey(Key, Provider)	removed preview
getKey(char[])	- preview
getKeyPair(Key)	added
getKeyPair(Key, Provider)	removed preview
getKeyPair(char[])	- preview
javax.net.ssl
ExtendedSSLSession
getNamedGroup()	added
SSLEngine
getSupportedNamedGroups()	added
SSLServerSocket
getSupportedNamedGroups()	added
SSLSocket
getSupportedNamedGroups()	added
java.compiler
javax.lang.model.element
Modifier
VALUE	added preview
javax.lang.model
SourceVersion
RELEASE_27	added
RELEASE_28	added
java.desktop
java.awt.geom
Arc2D
getBounds()	added
javax.swing
JEditorPane.JEditorPaneAccessibleHypertextSupport
changedUpdate(DocumentEvent)	added
insertUpdate(DocumentEvent)	added
removeUpdate(DocumentEvent)	added
java.management
javax.management.openmbean
OpenType
ALLOWED_CLASSNAMES	+ forRemoval

Data Source

This report is based on simple comparison of all public and protected APIs of the Java SE packages of JDK builds 28-ea+21-1707-open and 26.0.2.1+1-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.