Migrate all demos above Java 12 to Java 17 #108
Description
While the "Java 11 LTS" demos have problems with Java 11, hence 12 is the minimal reasonable version, all demos above Java 12 should be consolidated under Java 17 (LTS)
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While the "Java 11 LTS" demos have problems with Java 11, hence 12 is the minimal reasonable version, all demos above Java 12 should be consolidated under Java 17 (LTS)