[PDF] [PDF] Oracle JDK Migration Guide - Oracle Help Center

F30923-01 September 2020 Text Blocks, first previewed in Java SE 13, is a permanent feature in this release and can be used without You can download and install Apache Derby from Apache Derby Downloads Removed the JVM TI 



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[PDF] Oracle JDK Migration Guide - Oracle Help Center

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-XX:+UseZGC instanceof case ... : case ... ->

FileChannel

MappedByteBuffer

com.sun.management.OperatingSystemMXBean

Records

instanceof instanceof-and-cast jpackage

ȑswitch

switch java.net.Socket java.net.ServerSocket

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ȑNumberFormat

crypto.policy/conf/security/ java.security jdeprscan --release 15 -l --for-removal java.lang.invoke.ConstantBootstraps. java.lang.reflect.Modifier. java.security.acl

java.security.acl.Acljava.security.acl.AclEntryjava.security.acl.Groupjava.security.acl.Ownerjava.security.acl.Permissionjava.util.jar.Pack200.Packer java.util.jar.Pack200.Unpacker

java.util.jar.Pack200 java.lang.Runtime.traceInstructions(boolean) java.lang.Runtime.traceMethodCalls(boolean)

java.io.FileInputStream.finalize() java.io.FileOutputStream.finalize() java.util.zip.Deflater.finalize() java.util.zip.Inflater.finalize() java.util.zip.ZipFile.finalize()

javax.security.auth.Policy java.lang.Runtime.runFinalizersOnExit(boolean)java.lang.SecurityManager.checkAwtEventQueueAccess() java.lang.SecurityManager.checkMemberAccess(java.lang.Class,int)java.lang.SecurityManager.checkSystemClipboardAccess()java.lang.SecurityManager.checkTopLevelWindow(java.lang.Object)java.lang.System.runFinalizersOnExit(boolean)java.lang.Thread.destroy()java.lang.Thread.stop(java.lang.Throwable)

ȑjava.*javax.*

ȑcom.sun.*jdk.*

java.* java.*sun.* sun.*sun.misc.BASE64Encoder sun.misc.BASE64Decoder java.util.Base64

ȑsun.misc.Unsafe

java.awt.peerjava.awt.dnd.peer ȉ java.* java.awt.peer if (component.getPeer() != null) { .. } Component.isDisplayable()public boolean isDisplayable() { return getPeer() != null;ȑ if (component.getPeer() instanceof LightweightPeer) ..Component.isLightweight() public boolean isLightweight() { return getPeer() instanceof LightweightPeer; com.sun.image.codec.jpeg com.sun.image.codec.jpeg javax.imageio compact1 compact2 compact3 -profile javac java -profile javac --release 8ȉ java --limit-modules javac java

javac --limit-modules java.base,java.logging MyApp.javajava --limit-modules java.base,java.logging MyApp

compact2java.basejava.logging java.scripting java.rmi java.sql java.xml compact3 java.base java.loggingjava.scripting java.management java.namingjava.prefsjava.security.jgss java.security.sasljava.sql.rowset java.xml.crypto jdeps compact3 jdeps

System.out.printf()

java.locale.providers

COMPAT

CLDR java.locale.providers=COMPAT,CLDR jjs pack200 unpack200

Pack200

java.util.jar.Pack200 javadoc --no-module-directories javadoc javaws

ȑjava.xml.ws

ȑjava.xml.bind

ȑjava.xml.ws.annotation

ȑjava.corba

ȑjava.transaction

ȑjava.activation

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NoDefClassFoundError

ClassNotFoundException

appletviewer idljȑ orbdȑ servertoolȑ tnamesrv rmic -idl -iiop schemagenȑ wsgenȑ wsimportȑ xjc javapackagerȑ javaws jmc

JVM-MANAGEMENT-MIB.mib

jdk.snmp javah javac javac javah javac -h db hprof hprof hprof hprof jcmd jmap jcmd GC.heap_dump jmap -dump jhat java-rmi.exe java-rmi.cgi java-rmi.cgi$JAVA_HOME/bin java-rmi.exe$JAVA_HOME/bin java.lang.UnsupportedOperationException jvisualvm native2ascii ("_") static Object _ = new Object();

MyClass.java:2: error: as of release 9, ©_© is a keyword, and may not be used as a legal identifier.ȑ

-source -target javac -source/-target -source -target

>javac -source 5 -target 5 Sample.java warning: [options] bootstrap class path not set in conjunction with -source 5

error: Source option 5 is no longer supported. Use 6 or later. error: Target option 1.5 is no longer supported. Use 1.6 or later.

--release -source -target --release -source -target javac

ȑsun.misc.Unsafe

--add-exports jdeps jdeps jdeps -jdkinternals jdeps sun.misc.BASE64Encoder

>jdeps -jdkinternals Sample.classSample.class -> JDK removed internal API Sample -> sun.misc.BASE64Encoder JDK internal API (JDK removed internal API)Warning: JDK internal APIs are unsupported and private to JDK implementation that aresubject to be removed or changed incompatibly and could break your application.Please modify your code to eliminate dependency on any JDK internal APIs.For the most recent update on JDK internal API replacements, please check:https://wiki.openjdk.java.net/display/JDK8/Java+Dependency+Analysis+ToolJDK Internal API Suggested Replacement

---------------- ---------------------sun.misc.BASE64Encoder Use java.util.Base64 @since 1.8ȉ

jdeps jdeps jdeps jdepsȉ

>java -jar jython-standalone-2.7.0.jarWARNING: An illegal reflective access operation has occurredWARNING: Illegal reflective access by jnr.posix.JavaLibCHelper

(file:/C:/Jython/jython2.7.0/jython-standalone-2.7.0.jar) to method sun.nio.ch.SelChImpl.getFD()WARNING: Please consider reporting this to the maintainers of jnr.posix.JavaLibCHelperWARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operationsWARNING: All illegal access operations will be denied in a future releaseJython 2.7.0 (default:9987c746f838, Apr 29 2015, 02:25:11)

java --add-opens

>java --add-opens java.base/sun.nio.ch=ALL-UNNAMED --add-opens java.base/java.io=ALL-UNNAMED -jar jython-standalone-2.7.0.jarJython 2.7.0 (default:9987c746f838, Apr 29 2015, 02:25:11)

java --add-opens --illegal-access=warn --illegal-access=debug --illegal-access=deny --add-opens --illegal-access=deny --add-exports --add-exports --add-opens --add-exports --add-opens --add-exports --add-exports --add-exports /=(,)* --add-exports

ALL-UNNAMED

--add-exports java.management/sun.management=ALL-UNNAMED java.management/sun.management oldApp com.sun.jmx.remote.internal java.management --add-exports java.management/com.sun.jmx.remote.internal=ALL-UNNAMED --add-exports --add-opens setAccessible(true) --add-opens java --illegal-access=deny

IllegalAccessException

InaccessibleObjectException

--add-opens --add-opens --add-opens module/package=target-module(,target-module)*

ALL-UNNAMED

--add-opens java.management/sun.management=ALL-UNNAMED java.management/sun.management --add-opens --add-opens $FEATURE.$INTERIM.$UPDATE.$PATCH java.lang.Runtime.Version jre/ bin conf .properties .policy lib lib jdk/ jre/ javaȉ

ȑURLClassLoader

null

ClassLoader.getPlatformClassLoader

URLClassLoader

nullClassLoader java.base -Xbootclasspath/a null lib/rt.jar lib/tools.jar lib/dt.jar lib rt.jar

ȑClassLoader.getSystemResourceȉ

jrt conf/security/java.policy rt.jarȉ javac java java.ext.dirs lib/ext -XX:+CheckEndorsedAndExtDirs getPlatformClassLoader

/lib/ext exists, extensions mechanism no longer supported; Use -classpath instead..Error: Could not create the Java Virtual Machine.Error: A fatal exception has occurred. Program will exit.ȉ

java.ext.dirs ext/ java.ext.dirs java.endorsed.dirs lib/endorsed javac java java.endorsed.dirs $JAVA_HOME/lib/endorsed -XX:+CheckEndorsedAndExtDirs javac java java.endorsed.dirs lib/endorsed

/lib/endorsed is not supported. Endorsed standards and standalone APIsin modular form will be supported via the concept of upgradeable modules.Error: Could not create the Java Virtual Machine.Error: A fatal exception has occurred. Program will exit.ȉ

java.endorsed.dirs lib/endorsed java.endorsed.dirs java.awt.DesktopȄ com.apple.eawt com.apple.eio com.apple.eawt com.apple.eio apple com.apple com.apple.concurrent apple.applescript javax.script

AppleScriptEngine.jar

jlink java

ȑ-version:

ȑJRE-Version

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