List of Java class file major version numbers

By mkyong | Updated: August 25, 2022

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Tags: java class file javap jdk tools

This article shows all the major version of the Java class file, for example, Java 17 (major version 61), Java 11 (55), Java 8 (52).

javap to print Java class file

In Java, we can use the javap command tool to find the major version of the Java class file.

% javap -verbose ClassName | grep major

  major version: 61

In the above example, Java 17 (61) compiled the above ClassName.

References

• The class File Format
• Wikipedia – Java class file major version numbers
• How to check which JDK version compiled the class?
• Unsupported class file major version 51