java.lang.NoClassDefFoundError

[Lars Seifert]

Thank you both Alan and Christian for your help and time.
I found the "problem" and it is not located in Truezip nor 
java.nio.file. It was an option ("Shrink runtime") in the installer 
install4j, which i use. Everything was easy at the moment I realised, 
that the program could be started from command line without any problem. 
I don't have a clue, why this option fails on Java 7 or higher on Apple, 
but this is not really important :-)

Thank you again!
Lars