Maven release plugin: specify java compiler version

Question

I have this project made of multiple jars and war to make an ear. I build everything in snapshot and it works great. Then I made a release for every single project and saw t

Answer 1

You can verify the version a class is compiled for by using the javap utility included with the JDK. From the command line:

javap -verbose MyClass

In the output of javap look for "minor version" and "major version" about ten lines down.

Then use this table:

major       minor       Java platform version
45          3           1.0
45          3           1.1
46          0           1.2
47          0           1.3
48          0           1.4
49          0           1.5
50          0           1.6

The .class size difference may be due to compile version but also may be due to other compile options like compiling with debug information (line numbers in stacktraces).