Does WebSphere 9 support Java 9?

I have an EAR built in Java 8 and it works perfectly in WAS 9, but if I compile in Java 9, the EAR doesn't work and throws errors like these:

[17/05/22 16:19:56:214 CDT] 000000ad wtp           W org.eclipse.jst.j2ee.commonarchivecore.internal.helpers.WARFileAnnotationsDetector locateAnnotations Failed to create class reader for [ WEB-INF/classes/com/ibatis/sqlmap/engine/mapping/sql/dynamic/DynamicSql.class ] in [ H2H.war ]: [ null ]
[17/05/22 16:19:56:214 CDT] 000000ad wtp           W org.eclipse.jst.j2ee.commonarchivecore.internal.helpers.WARFileAnnotationsDetector locateAnnotations Failed to create class reader for [ WEB-INF/classes/com/back/auditoria/InsertAuditoriaADM.class ] in [ H2H.war ]: [ null ]
[17/05/22 16:19:56:214 CDT] 000000ad wtp           W org.eclipse.jst.j2ee.commonarchivecore.internal.helpers.WARFileAnnotationsDetector locateAnnotations Failed to create class reader for [ WEB-INF/classes/com/back/auditoria/PistasAuditoria.class ] in [ H2H.war ]: [ null ]
[17/05/22 16:19:56:215 CDT] 000000ad wtp           W org.eclipse.jst.j2ee.commonarchivecore.internal.helpers.WARFileAnnotationsDetector locateAnnotations Failed to create class reader for [ WEB-INF/classes/com/back/auditoria/SecurityPistas.class ] in [ H2H.war ]: [ null ]
[17/05/22 16:19:56:215 CDT] 000000ad wtp           W org.eclipse.jst.j2ee.commonarchivecore.internal.helpers.WARFileAnnotationsDetector locateAnnotations Failed to create class reader for [ WEB-INF/classes/com/back/auditoria/Variables.class ] in [ H2H.war ]: [ null ]
[17/05/22 16:19:56:215 CDT] 000000ad wtp           W org.eclipse.jst.j2ee.commonarchivecore.internal.helpers.WARFileAnnotationsDetector locateAnnotations Failed to create class reader for [ WEB-INF/classes/com/back/bd/PFIMonitorBD.class ] in [ H2H.war ]: [ null ]

Solution

The WebSphere Application Server V9 traditional runtime does not run on Java versions after 8. If you want to run on Java 11, 17 or newer then you can use WebSphere Liberty instead.