Updatable result set can be used to insert rows to the table, by using ResultSet.insertRow().
Example of using ResultSet.insertRow() to insert a row:
Statement stmt = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY,
ResultSet.CONCUR_UPDATABLE);
ResultSet uprs = stmt.executeQuery(
"SELECT firstname, lastname, workdept, bonus " +
"FROM employee");
uprs.moveToInsertRow();
uprs.updateString("FIRSTNAME", "Andreas");
uprs.updateString("LASTNAME", "Korneliussen");
uprs.updateInt("WORKDEPT", 123);
uprs.insertRow();
uprs.moveToCurrentRow();