New APIs in Java 18

Comparing Java 18 (18.0.2.1+1-tem) with Java 17 (17.0.10+7-tem).

Element	Modification
java.base
java.io
FileInputStream
transferTo(OutputStream)	added
ObjectInputStream.GetField
get(String, Object)	+ throws ClassNotFoundException
PrintStream
charset()	added
java.lang.invoke
MethodHandle
asType(MethodType)	+ final
java.lang.reflect
Method
invoke(Object, Object...)	- throws IllegalArgumentException
java.lang
Enum
finalize()	+ deprecated + 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
Runtime
exec(String)	+ deprecated
exec(String, String[])	+ deprecated
exec(String, String[], File)	+ deprecated
runFinalization()	+ deprecated + 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
runFinalization()	+ deprecated + forRemoval
Thread
stop()	+ forRemoval
java.net.spi
InetAddressResolver.LookupPolicy	added
InetAddressResolverProvider	added
InetAddressResolverProvider.Configuration	added
InetAddressResolver	added
java.nio.charset
Charset
forName(String, Charset)	added
java.security
KeyStoreSpi
engineGetAttributes(String)	added
KeyStore
getAttributes(String)	added
java.time
Duration
isPositive()	added
java.util.concurrent
ThreadPoolExecutor
finalize()	+ forRemoval
javax.security.auth
Subject
callAs(Subject, Callable)	added
current()	added
doAs(Subject, PrivilegedAction)	+ deprecated + forRemoval
doAs(Subject, PrivilegedExceptionAction)	+ 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
ExecutableElement
getEnclosingElement()	added
javax.lang.model.util
Elements
getFileObjectOf(Element)	added
getOutermostTypeElement(Element)	added
javax.lang.model
SourceVersion
RELEASE_18	added
runtimeVersion()	added
valueOf(Runtime.Version)	added
javax.tools
ForwardingJavaFileManager
getFileForOutputForOriginatingFiles(JavaFileManage...	added
getJavaFileForOutputForOriginatingFiles(JavaFileMa...	added
DocumentationTool.Location
SNIPPET_PATH	added
JavaFileManager
getFileForOutputForOriginatingFiles(JavaFileManage...	added
getJavaFileForOutputForOriginatingFiles(JavaFileMa...	added
java.desktop
java.awt.color
ICC_Profile
finalize()	removed
java.awt.image
ColorModel
finalize()	removed
IndexColorModel
finalize()	removed
java.awt
Graphics
finalize()	+ forRemoval
PrintJob
finalize()	+ forRemoval
javax.imageio.spi
ServiceRegistry
finalize()	+ forRemoval
javax.imageio.stream
FileCacheImageInputStream
finalize()	+ forRemoval
FileImageInputStream
finalize()	+ forRemoval
FileImageOutputStream
finalize()	+ forRemoval
ImageInputStreamImpl
finalize()	+ forRemoval
MemoryCacheImageInputStream
finalize()	+ forRemoval
java.management
java.lang.management
MemoryMXBean
getObjectPendingFinalizationCount()	+ deprecated
java.net.http
java.net.http
HttpRequest.Builder
HEAD()	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 17.0.10+7-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.

More detailed API comparisons based on the japicmp tool can be found here.