Operation not allowed after ResultSet closed

public ResultSet findDetail(String username){
		ResultSet rset=null;
		Connection con=null;
                Statement stmt=null;
                //"+username+"
		String query="SELECT * from studentdetail where semail='sonu.anisha@gmail.com' ";
		try{
			con=openConnection();
                }
                catch(Exception e){
                  out.println("<HTML><body>");
                  out.write("Connection null"+e.getMessage());
                  out.println("</body></HTML>");  
                }
                try{        
			stmt=con.createStatement();
                        //stmt.setString(1,username);
                        rset=stmt.executeQuery(query);
		}
                catch(Exception e){
                    out.println("<HTML><body>"); 
                        out.write("Exception "+e.getMessage());
                        out.println("</body></HTML>"); 
		}
		finally{
			try{
				con.close();
			}
			catch(Exception e){
                        out.write("Closing Tiime"+ e.getMessage());        
			}
		}
		return rset;
	}

This function is returning null pointer Exception.
SQL Exception Operation not allowed after ResultSet closed

Singh Anisha wrote: finally{ try{ con.close(); } catch(Exception e){ out.write("Closing Tiime"+ e.getMessage()); } } return rset;

What these Line says to You ? ..

Its closing the connection not the statement.. so that it could throw exception.

Singh Anisha wrote:Its closing the connection not the statement.

Huh ?! ... If you close the Connection then your closing statement and resultset too. This post has to moved to Jdbc Forum.