Is there any way to copy the contents(fully/partially) one Resultset object to another say, like i want to copy 10th to 20th records of rs1 to rs2.
Not with standard JDBC. ResultSets are not copyable or clonable. It's remotely possible that a particular driver might have methods to allow this, but no driver I'm familiar with does, and there are lots of good technical reasons not to with many databases.
ResultSets should be thought of as a wrapper class around a network connection; in many implementaions, the results are fetched as needed over the network.