Class files are usually compressed and bundled into jar files.
Each class file is marked with a class file format version, which lets you know which JDK (Java Development Kit) it was compiled for. At offset 6 in the class file is a big-endian short that gives the major version number. You can display for the classes is in a jar with JarCheck.
| Class File Versions | |
|---|---|
| JDK | Major Version |
| 6.0 | 50 |
| 5.0 | 49 |
| 1.4 | 48 |
| 1.3 | 47 |
| 1.2 | 46 |
| 1.1 | 45 |
| 1.0 | 44 |
|
|
available on the web at: |
http://mindprod.com/jgloss/javaclassformat.html |
optional Replicator mirror
|
J:\mindprod\jgloss\javaclassformat.html | |
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