New APIs in Java 18

Comparing Java 18 (18.0.2.1+1-tem) with Java 15 (15.0.2+7-adpt).

Element	Modification
java.base
java.io
CharArrayReader
read(CharBuffer)	added
Console
charset()	added
FileInputStream
readAllBytes()	added
readNBytes(int)	added
transferTo(OutputStream)	added
InputStreamReader
read(CharBuffer)	added
ObjectInputFilter.Config
getSerialFilterFactory()	added
setSerialFilterFactory(BinaryOperator)	added
ObjectInputStream.GetField
get(String, Object)	+ throws ClassNotFoundException
PrintStream
charset()	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
ClassDesc	+ sealed
ConstantDesc	+ sealed
DirectMethodHandleDesc	+ sealed
MethodHandleDesc	+ sealed
MethodTypeDesc	+ sealed
java.lang.invoke
MethodHandle
asType(MethodType)	+ final
MethodHandles.Lookup
ORIGINAL	added
defineHiddenClassWithClassData(byte[], Object,...	added
MethodHandles
classData(MethodHandles.Lookup, String, Class)	added
classDataAt(MethodHandles.Lookup, String, Class,...	added
dropReturn(MethodHandle)	added
tableSwitch(MethodHandle, MethodHandle...)	added
VarHandle
hasInvokeExactBehavior()	added
withInvokeBehavior()	added
withInvokeExactBehavior()	added
java.lang.ref
Reference
isEnqueued()	+ deprecated
refersTo(Object)	added
java.lang.reflect
AccessibleObject
AccessibleObject()	+ deprecated
Executable	+ sealed
Method
invoke(Object, Object...)	- throws IllegalArgumentException
RecordComponent	- preview
InvocationHandler
invokeDefault(Object, Method, Object...)	added
java.lang.runtime
ObjectMethods	- preview
SwitchBootstraps	added preview
java.lang
Boolean
Boolean(String)	+ forRemoval
Boolean(boolean)	+ forRemoval
Byte
Byte(String)	+ forRemoval
Byte(byte)	+ forRemoval
Character
Character(char)	+ forRemoval
Class
getPermittedSubclasses()	added
getRecordComponents()	- preview
isRecord()	- preview
isSealed()	- preview
permittedSubclasses()	removed preview
Double
Double(String)	+ forRemoval
Double(double)	+ forRemoval
Enum
finalize()	+ deprecated + forRemoval
Float
Float(String)	+ forRemoval
Float(double)	+ forRemoval
Float(float)	+ forRemoval
IndexOutOfBoundsException
IndexOutOfBoundsException(long)	added
Integer
Integer(String)	+ forRemoval
Integer(int)	+ forRemoval
Long
Long(String)	+ forRemoval
Long(long)	+ forRemoval
Math
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
divideExact(int, int)	added
divideExact(long, long)	added
floorDivExact(int, int)	added
floorDivExact(long, long)	added
unsignedMultiplyHigh(long, long)	added
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
SecurityManager	+ deprecated + forRemoval
checkMulticast(InetAddress, byte)	+ forRemoval
Short
Short(String)	+ forRemoval
Short(short)	+ forRemoval
StrictMath
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
divideExact(int, int)	added
divideExact(long, long)	added
floorDivExact(int, int)	added
floorDivExact(long, long)	added
unsignedMultiplyHigh(long, long)	added
System
getSecurityManager()	+ deprecated + forRemoval
runFinalization()	+ deprecated + forRemoval
setSecurityManager(SecurityManager)	+ deprecated + forRemoval
ThreadGroup
checkAccess()	+ deprecated + forRemoval
destroy()	+ deprecated + forRemoval
isDaemon()	+ deprecated + forRemoval
isDestroyed()	+ deprecated + forRemoval
setDaemon(boolean)	+ deprecated + forRemoval
stop()	+ forRemoval
Thread
checkAccess()	+ deprecated + forRemoval
stop()	+ forRemoval
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
ServerSocket
setSocketFactory(SocketImplFactory)	+ deprecated
Socket
setSocketImplFactory(SocketImplFactory)	+ deprecated
URLDecoder
URLDecoder()	removed
UnixDomainSocketAddress	added
StandardProtocolFamily
UNIX	added
java.nio.charset
Charset
forName(String, Charset)	added
java.nio
ByteBuffer
put(int, ByteBuffer, int, int)	added
CharBuffer
put(int, CharBuffer, int, int)	added
DoubleBuffer
put(int, DoubleBuffer, int, int)	added
FloatBuffer
put(int, FloatBuffer, int, int)	added
IntBuffer
put(int, IntBuffer, int, int)	added
LongBuffer
put(int, LongBuffer, int, int)	added
MappedByteBuffer
compact()	added
duplicate()	added
slice()	added
slice(int, int)	added
ShortBuffer
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.spec
MGF1ParameterSpec
SHA3_224	added
SHA3_256	added
SHA3_384	added
SHA3_512	added
toString()	added
java.security
AccessControlContext	+ deprecated + forRemoval
AccessControlException	+ deprecated + forRemoval
AccessController	+ deprecated + forRemoval
KeyStoreSpi
engineGetAttributes(String)	added
KeyStore
getAttributes(String)	added
PolicySpi	+ deprecated + forRemoval
Policy	+ deprecated + forRemoval
DomainCombiner	+ deprecated + forRemoval
Policy.Parameters	+ deprecated + forRemoval
java.time.format
DateTimeFormatterBuilder
appendDayPeriodText(TextStyle)	added
java.time
Clock	+ implements InstantSource
Duration
isPositive()	added
InstantSource	added
java.util.concurrent
Executors
privilegedCallable(Callable)	+ deprecated + forRemoval
privilegedCallableUsingCurrentClassLoader(Callable...	+ deprecated + forRemoval
privilegedThreadFactory()	+ deprecated + forRemoval
ForkJoinPool
invokeAll(Collection, long, TimeUnit)	added
invokeAny(Collection)	added
invokeAny(Collection, long, TimeUnit)	added
ThreadLocalRandom
nextFloat(float)	added
nextFloat(float, float)	added
nextGaussian()	removed
ThreadPoolExecutor
finalize()	+ forRemoval
java.util.random	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
HexFormat	added
Objects
checkFromIndexSize(long, long, long)	added
checkFromToIndex(long, long, long)	added
checkIndex(long, long)	added
Random	+ implements RandomGenerator
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
Map.Entry
copyOf(Map.Entry)	added
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
Modifier
NON_SEALED	- preview
SEALED	- preview
ElementVisitor
visitRecordComponent(RecordComponentElement,...	- preview
ExecutableElement
getEnclosingElement()	added
RecordComponentElement	- preview
TypeElement
getPermittedSubclasses()	- preview
getRecordComponents()	- 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
recordComponentFor(ExecutableElement)	- preview
javax.lang.model
SourceVersion
RELEASE_16	added
RELEASE_17	added
RELEASE_18	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_Profile
finalize()	removed
java.awt.dnd
DragSourceAdapter
DragSourceAdapter()	- public + protected
DropTargetAdapter
DropTargetAdapter()	- public + protected
java.awt.event
ComponentAdapter
ComponentAdapter()	- public + protected
ContainerAdapter
ContainerAdapter()	- public + protected
FocusAdapter
FocusAdapter()	- public + protected
HierarchyBoundsAdapter
HierarchyBoundsAdapter()	- public + protected
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.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
Image
Image()	- public + protected
PrintJob
PrintJob()	- public + protected
finalize()	+ forRemoval
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.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
intervalRemoved(ListDataEvent)	+ deprecated
lt(File, File)	+ deprecated
BasicLookAndFeel
BasicLookAndFeel()	- public + protected
BasicMenuItemUI.MouseInputHandler	+ deprecated
BasicRadioButtonUI
installListeners(AbstractButton)	removed
uninstallListeners(AbstractButton)	removed
BasicScrollPaneUI.HSBChangeListener	+ deprecated
BasicScrollPaneUI.PropertyChangeHandler	+ deprecated
BasicScrollPaneUI.VSBChangeListener	+ deprecated
BasicScrollPaneUI.ViewportChangeHandler	+ deprecated
BasicSliderUI
BasicSliderUI()	added
BasicToolBarUI
createFloatingFrame(JToolBar)	+ deprecated
javax.swing.plaf.metal
MetalTheme
MetalTheme()	- public + protected
javax.swing.plaf.synth
SynthDesktopIconUI
uninstallComponents()	added
SynthPainter
SynthPainter()	- public + protected
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
HTMLDocument.Iterator
Iterator()	- public + protected
HTMLEditorKit.Parser
Parser()	- public + protected
javax.swing.text
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
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
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
java.logging
java.util.logging
LogManager
checkAccess()	+ deprecated + forRemoval
LogRecord
getLongThreadID()	added
getThreadID()	+ deprecated
setLongThreadID(long)	added
setThreadID(int)	+ deprecated
java.management
java.lang.management
MemoryMXBean
getObjectPendingFinalizationCount()	+ deprecated
javax.management.relation
RoleStatus
RoleStatus()	+ deprecated + forRemoval
java.naming
javax.naming
Context
APPLET	+ forRemoval
java.net.http
java.net.http
HttpRequest.BodyPublishers
concat(HttpRequest.BodyPublisher...)	added
HttpRequest
newBuilder(HttpRequest, BiPredicate)	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
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 18.0.2.1+1-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.