Doesn't work with Java 21 (LTS)

[zAlbee]

It looks like 4.0 requires Java 23. I think this is a mistake. Java 23 is a non-LTS version. LTS (long term support) versions are 8, 11, 17, and 21. Even Gradle only requires Java 8.

This is what I get trying to run with Java 21:

c:\Programs\restclient-ui-4.0.1>bin\restclient-ui
Error: LinkageError occurred while loading main class org.wiztools.restclient.ui.Main
        java.lang.UnsupportedClassVersionError: org/wiztools/restclient/ui/Main has been compiled by a more recent version of the Java Runtime (class file version 67.0), this version of the Java Runtime only recognizes class file versions up to 65.0

IMO, I don't think Java apps should require the latest version of Java to run -- it should ask for the minimum version of Java that has the features the app needs. (If the code compiles with a lower version, that most likely means it can run with that version.)

I am guessing this project could probably get away with Java 10 or 11 minimum. I see a change to use method https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/java/awt/Toolkit.html#getMenuShortcutKeyMaskEx() that was introduced in Java 10.

[subwiz]

I just took the approach of the latest available version of Java in the attempt to revive the project. Let me check the possibilities, and potentially release a new version to support the older JVMs.

[subwiz]

Looks like I need version 17 minimum if I have to make no code change, which I intend not to. Java 17's Extended Support is defined to be until September 2029, which seems to be long enough from today for basing my decision.

[subwiz]

PR: #95

[subwiz]

Release done: https://github.com/wiztools/rest-client/releases/tag/v4.0.2

[zAlbee]

Thanks! Confirming that I'm able to run the latest version on Java 21.

[zAlbee]

Unfortunately, 4.0.3 seems to have reverted to requiring Java 23 again.

C:\Programs\RESTClient\restclient-ui-4.0.3\bin\restclient-ui.bat
Error: LinkageError occurred while loading main class org.wiztools.restclient.ui.Main
        java.lang.UnsupportedClassVersionError: org/wiztools/restclient/ui/Main has been compiled by a more recent version of the Java Runtime (class file version 67.0), this version of the Java Runtime only recognizes class file versions up to 65.0

I am on

>java --version
openjdk 21.0.5 2024-10-15 LTS
OpenJDK Runtime Environment Temurin-21.0.5+11 (build 21.0.5+11-LTS)
OpenJDK 64-Bit Server VM Temurin-21.0.5+11 (build 21.0.5+11-LTS, mixed mode, sharing)

https://javaalmanac.io/bytecode/versions/ says

JDK Version	Class File Version
Java 21	65.0
Java 22	66.0
Java 23	67.0