[jira] [Resolved] (NETBEANS-5491) UnsupportedClassVersionError - If I set the NetBeans Runtime to Java 16, I cannot run a project created in Java 15.

["Michal Rama (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NETBEANS-5491?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michal Rama resolved NETBEANS-5491.
-----------------------------------
    Resolution: Fixed

> UnsupportedClassVersionError - If I set the NetBeans Runtime to Java 16, I cannot run a project created in Java 15.
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: NETBEANS-5491
>                 URL: https://issues.apache.org/jira/browse/NETBEANS-5491
>             Project: NetBeans
>          Issue Type: Bug
>          Components: java - Platform, java - Project, java - Source
>    Affects Versions: 12.3
>         Environment: Windows 10, Apache NetBeans 12.3, Java 16
>            Reporter: Michal Rama
>            Assignee: Svatopluk Dedic
>            Priority: Blocker
>              Labels: java, platform, project, runtime, version
>             Fix For: 12.4
>
>         Attachments: obr�zek02.png, obr�zek41.png
>
>
> Hello,
> I installed Java 16 and set it in the etc\netbeans.conf file
> *netbeans_jdkhome="C:\Program Files\Java\jdk-16"*
> However, upon startup, all projects reported an error. NetBeans automatically set the *Java Platform* to *JDK 16* for them, but the *Source / Binary Format* was still *JDK 15*.
>  !obr�zek41.png! 
>  !obr�zek02.png! 
> So it was enough to change it to JDK 16, except for one project that still can't be run and I didn't figure out why.
> To run this project I need to close NetBeans and run it again in Java 15.
> Creating a new project in Java 16 would probably solve the problem, but why should I do it when there was no problem with all the other projects.
> Please help.
> Thank you
> PS.
> {code:java}
> run:
> Error: LinkageError occurred while loading main class example.TextHeight
> 	java.lang.UnsupportedClassVersionError: example/TextHeight (class file version 59.65535) was compiled with preview features that are unsupported. This version of the Java Runtime only recognizes preview features for class file version 60.65535
> C:\Users\NAME_OF_USER\AppData\Local\NetBeans\Cache\12.3\executor-snippets\run.xml:111: The following error occurred while executing this line:
> C:\Users\NAME_OF_USER\AppData\Local\NetBeans\Cache\12.3\executor-snippets\run.xml:68: Java returned: 1
> BUILD FAILED (total time: 1 second)
> {code}



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