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https://issues.apache.org/jira/browse/NETBEANS-6285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17469687#comment-17469687
]
Jaroslav Tulach commented on NETBEANS-6285:
-------------------------------------------
I've just built recent NetBeans:
{code}
netbeans$ git log | head -n 1
commit 76183f342a62d9f0e6732d7b500430d34d813b54
netbeans$ JAVA_HOME=/jdk-11/ ant build
{code}
and then verified whether the classfiles are correct using the
[ValidateClassFilesTest introduced by
PR-2761|https://github.com/apache/netbeans/pull/2761]:
{code}
netbeans$ ant -f platform/o.n.core/ -Dtest.type=qa-functional test-single
-Dtest.includes=**/ValidateClassFilesTest*
{code}
they are - e.g. they all shall have [major classpath version
52|https://stackoverflow.com/questions/9170832/list-of-java-class-file-format-major-version-numbers]
and thus be targetted for JDK8. The same applies to
{{org.netbeans.modules.java.source.parsing.FileObjects}}:
{code}
netbeans$ cd nbbuild
nbbuild$ javap -v -c -cp
netbeans/java/modules/org-netbeans-modules-java-source-base.jar
org/netbeans/modules/java/source/parsing/FileObjects | head -n7
Classfile
jar:file:/netbeans/java/modules/org-netbeans-modules-java-source-base.jar!/org/netbeans/modules/java/source/parsing/FileObjects.class
Last modified 6.1.2022; size 29135 bytes
MD5 checksum 8b8fe1fd32aa92135598fe1947a5c420
Compiled from "FileObjects.java"
public class org.netbeans.modules.java.source.parsing.FileObjects
minor version: 0
major version: 52
{code}
however, there is really a call to {{CharBuffer.flip()}}:
{code}
nbbuild$ javap -c -cp
netbeans/java/modules/org-netbeans-modules-java-source-base.jar
org/netbeans/modules/java/source/parsing/FileObjects | grep flip -C3
132: invokevirtual #75 // Method
java/nio/CharBuffer.append:(Ljava/lang/CharSequence;)Ljava/nio/CharBuffer;
135: bipush 32
137: invokevirtual #76 // Method
java/nio/CharBuffer.append:(C)Ljava/nio/CharBuffer;
140: invokevirtual #77 // Method
java/nio/CharBuffer.flip:()Ljava/nio/CharBuffer;
143: invokespecial #73 // Method
org/netbeans/modules/java/source/parsing/FileObjects$MemoryFileObject."<init>":(Ljava/lang/String;Ljava/lang/String;Ljava/net/URI;JLjava/nio/CharBuffer;)V
146: areturn
{code}
this is caused by nb-javac passing bootclasspath option when compiling the
module and thus disabling usage of {{--release}}:
{code}
netbeans$ JAVA_HOME=~/bin/jdk-11 ant -f java/java.source.base/ -v build | grep
-- -X.*bootclasspath
[nb-javac]
'-Xbootclasspath/p:/home/devel/NetBeansProjects/netbeans/java/libs.javacapi/external/nb-javac-jdk-17.0.1-ga-api.jar:/home/devel/NetBeansProjects/netbeans/java/libs.javacapi/external/nb-javac-jdk-17.0.1-ga.jar'
{code}
> Netbeans 12.6 seems no properly run on JDK 8
> --------------------------------------------
>
> Key: NETBEANS-6285
> URL: https://issues.apache.org/jira/browse/NETBEANS-6285
> Project: NetBeans
> Issue Type: Bug
> Components: java - Platform
> Affects Versions: 12.6
> Reporter: Jean-Marc Borer
> Assignee: Jaroslav Tulach
> Priority: Major
> Attachments: messages.log
>
>
> After a full fresh install of NB12.6 and trying to run with Azul Open JDK 1.8
> 312, there are several ClassNotFoundExceptions in the logs. It seems that NB
> looks for missing methods that make NB not longer properly. For example, it
> is no longer possible to properly format Java sources files due to a
> java/nio/CharBuffer method missing.
> Is NB platform supposed to no longer work with Java 8?
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