Normally Bnd will examine the method bodies of classes looking for the instruction sequence:
ldc(_w) "some.Class" invokestatic "java/lang/Class" "forName(Ljava/lang/String;)Ljava/lang/Class;"
which results from calls to
Class.forName(String) passing a String constant for the class name. Bnd will use the String constant as a class reference for the purposes of calculating package references for generating the Import-Package manifest header.
-noclassforname instruction can be used to tell Bnd to not search the method bodies for this instruction sequence.