How can I find the target Java version for a compiled class?

Question

Duplicate:

Tool to read and display Java .class versions

If I have a compiled Java class, is there a way to tell from just the cla

Answer 1

Linux/Unix users have a nice tool out of the standard toolbox: file utility. Modern versions can detect the Java class fersion version and even output Java version for known class file types.

Example output:

com/sample/Tracker.class: compiled Java class data, version 45.3
com/sample/TestListener.class: compiled Java class data, version 49.0 (Java 1.5)

And it fits very nicely into the standard Unix scripting toolchain.