Difference between conn.close() and conn=null;

Question

Hi All,
Can anybody please let me know the difference between conn.close()
and conn=null;
where conn is reference to Connection.
Thanks and Regards
-sunjavadeveloper

Answer 1

Thanks for your response.
Is there any other good approach to close() & then
null the Obj. can u give us your opinion.
          finally
            try{
                     if(dbconn != null)     dbconn.close();
                     if(stmt != null) stmt.close();
                     if(rs != null) rs.close();
                     if(con != null) con.close();
            catch (Exception e)
                   logger.fatal(e.getMessage(),e);
throw new Exception ("Exception -- Vendor.java --
a -- authenticate -- " + e.getMessage() );
               dbconn = null;
               rs = null;
               stmt=null;
               con = null;
Putting the close() calls in finally block is good, but having them in individual try/catch blocks is better. That way you can still try to close the connection if closing the statement throws an exception.
I don't bother setting them to null. GC is smart enough to know that they've gone out of scope. I don't think it helps.
%