New APIs in Java 23

Comparing Java 23 (23-ea+21-1723-open) with Java 22 (22.0.1+8-tem).

Element	Modification
java.base
java.io
ObjectOutputStream.PutField
write(ObjectOutput)	+ forRemoval
java.lang.classfile
ClassFile
JAVA_23_VERSION	added preview
ClassSignature
of(List, Signature.ClassTypeSig,...	added preview
of(List, Signature.RefTypeSig,...	removed preview
of(Signature.ClassTypeSig,...	added preview
of(Signature.RefTypeSig, Signature.RefTypeSig...)	removed preview
superclassSignature()	added preview
superclassSignature()	removed preview
java.lang.foreign
MemorySegment
maxByteAlignment()	added
SymbolLookup
findOrThrow(String)	added
java.lang.invoke
StringConcatFactory
MAX_INDY_CONCAT_ARG_SLOTS	removed preview
makeConcatWithTemplate(List, List)	removed preview
makeConcatWithTemplateCluster(List, List, int)	removed preview
makeConcatWithTemplateGetters(List, List, int)	removed preview
java.lang.reflect
ClassFileFormatVersion
RELEASE_23	added
java.lang.runtime
ExactConversionsSupport	added
TemplateRuntime	removed preview
java.lang
ThreadGroup
resume()	removed
stop()	removed
suspend()	removed
Thread
resume()	removed
suspend()	removed
StringTemplate.Processor.Linkage	removed preview
StringTemplate.Processor	removed preview
StringTemplate	removed preview
java.text
ChoiceFormat
isStrict()	added
setStrict(boolean)	added
toString()	added
CompactNumberFormat
isStrict()	added
setStrict(boolean)	added
toString()	added
DecimalFormat
isStrict()	added
setStrict(boolean)	added
toString()	added
MessageFormat
toString()	added
NumberFormat
isStrict()	added
setStrict(boolean)	added
SimpleDateFormat
toString()	added
java.util.zip
Deflater
getTotalIn()	+ deprecated
getTotalOut()	+ deprecated
Inflater
getTotalIn()	+ deprecated
getTotalOut()	+ deprecated
ZipFile
toString()	added
java.util
FormatProcessor	removed preview
java.compiler
javax.lang.model.util
AbstractAnnotationValueVisitorPreview	added preview
AbstractElementVisitorPreview	added preview
AbstractTypeVisitorPreview	added preview
ElementKindVisitorPreview	added preview
ElementScannerPreview	added preview
SimpleAnnotationValueVisitorPreview	added preview
SimpleElementVisitorPreview	added preview
SimpleTypeVisitorPreview	added preview
TypeKindVisitorPreview	added preview
Types
stripAnnotations(TypeMirror)	added
javax.lang.model
SourceVersion
RELEASE_23	added
javax.tools
SimpleJavaFileObject
forSource(URI, String)	added
java.desktop
javax.swing.plaf.synth
SynthTreeUI
getCollapsedIcon()	added
javax.swing
JScrollBar
setMaximumSize(Dimension)	added
setMinimumSize(Dimension)	added
java.management.rmi
javax.management.remote.rmi
RMIConnector
getMBeanServerConnection(Subject)	removed
java.management
javax.management.loading
MLetContent	removed
MLet	removed
PrivateMLet	removed
MLetMBean	removed
javax.management.remote
JMXConnector
getMBeanServerConnection(Subject)	- abstract

Data Source

This report is based on simple comparison of all public and protected APIs of the java.* and javax.* packages of JDK builds 23-ea+21-1723-open and 22.0.1+8-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.