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Java Exception in thread UnsupportedClassVersionError

After compiling a Java application with the Java Barcode Generator and trying to run it you may receive an error such as:
Exception in thread "main" java.lang.UnsupportedClassVersionError: (your application) has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0.


12-19-23     118 day(s) ago    

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Brant

Best Answer

This error tells us that our class was compiled with a newer version of Java than the version with which we tried to run it. To fix this issue, compile to an earlier supported version of Java or uninstall and reinstall the latest version of the Java JDK. This particular issue was resolved by compiling to target Java 8 with the following syntax:
javac --release 8 yourapp.java

Java class file version numbers and release reference:
45 = Java 1.1
46 = Java 1.2
47 = Java 1.3
48 = Java 1.4
49 = Java 5
50 = Java 6
51 = Java 7
52 = Java 8
53 = Java 9
54 = Java 10
55 = Java 11
56 = Java 12
57 = Java 13
58 = Java 14
59 = Java 15
60 = Java 16
61 = Java 17
62 = Java 18
63 = Java 19
64 = Java 20
65 = Java 21
66 = Java 22

You can also refer to the Java Version History Wiki.

Posted 118 day(s) ago

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