Java Question PARSE ERROR: unsupported class file version 52.0

[jkhazraji]

I compiled a library in Eclipse and exported it to b4a . I ensured no error in Eclipse code and generated the jar and xml files. but as I used it and ran the project on emulator I got the following error:

PARSE ERROR:
unsupported class file version 52.0
...while parsing jbc/jbc.class
1 error; aborting

I have read that it is because of JDK (1.8 vs 1.7) incompatibility. I wonder what to do to correct this error
What could I have missed?
Edit: I also ensured that it is running as a Java Application inside Eclipse IDE with some modifications

 

[Erel]

You need to set the compiler compliance level to Java 7 (1.7) or 6. It is in the Eclipse project settings.