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.

Java Version	Bytecode Version
1.0	45.0
1.1	45.3
1.2	46.0
1.3	47.0
1.4	48.0
5	49.0
6	50.0
7	51.0
8	52.0
9	53.0
10	54.0
11	55.0
12	56.0
13	57.0
14	58.0
15	59.0
16	60.0
17	61.0

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/README.md