Java Bytecode Version

Internal

• Java Bytecode

Overview

A valid class file starts with 0xcafebabe, followed by the minor version as unsigned short, followed by the major version, as unsigned short.

Playground

The following project produces a bytecode-version.jar that reads the bytecode version from a Java class:

https://github.com/ovidiuf/playground/tree/master/java/bytecode/bytecode-version