Revision as of 19:01, 12 June 2021

Internal

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	1.1

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

@@ Line 5: / Line 5: @@
 {|class="wikitable" style="text-align: left;"
-| a ||
+! Java Version
+! Bytecode Version
+|-
+| 1.0 || 1.1
 |-
 |}