| Author |
java version of .class file
|
michael modenese
Greenhorn
Joined: Mar 22, 2006
Posts: 12
|
|
Hi there,
i have a question concerning the jdk version i used to compile and jar my project. is there a way to find out from the jar file with what version the project has been compiled ? the "Created-By:" (example : Created-By: 1.5.0_09-b01 (Sun Microsystems Inc.)) from the manifest file in my jar is the version of my jar tool.
thanks, mike
|
 |
marc weber
Sheriff
Joined: Aug 31, 2004
Posts: 11343
|
|
See if this helps:
...every .class file you generate contains a version stamp: two unsigned short integers starting at byte offset 4, right after the 0xCAFEBABE magic number. They are the major/minor version numbers of the class format...
Ref: JavaWorld - What Version is Your Java Code? (2003).
Related: JavaWorld - Magic and version numbers (1996).
|
"We're kind of on the level of crossword puzzle writers... And no one ever goes to them and gives them an award." ~Joe Strummer
sscce.org
|
|
marc weber
Sheriff
Joined: Aug 31, 2004
Posts: 11343
|
|
By the way, my second reference above is from a JavaWorld article, The Java classfile lifestyle, which (despite being over 10 years old) provides a very interesting and accessible overview of the .class file structure.
A more technical version can be found in the JVM Spec.
[ January 23, 2007: Message edited by: marc weber ]
|
|
 |
|
|
subject: java version of .class file
|
|
|
0
