Hello Anita
It look like you are right and this is the only thing I could find. I am not sure whether it is specific to Java but it looks like.
2 All Databases: Database-Specific Procedures (Homogeneous System Copy)
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When performing a system copy using a database-specific method, it is no longer required to perform an export of the source system.
Note 1738258 - System Copy of Systems Based on SAP NetWeaver 7.1 and Higher
In this case i suggest you to try it yourself and let others know how it went.
Good Luck
RB