Invalid charector

Question

I am getting ORA-00091 error message when I am using select query in a class file
public class QueryPnum {
String Identifier=null;
public QueryPnum()
super();
public String getIdentifier()
return this.Identifier;
public void setIdentifier(String tidentifier)
this.Identifier = tidentifier;
public String doQuery() throws ClassNotFoundException, SQLException
Connection con = null;
PreparedStatement ps= null;
ResultSet rs = null;
con = DBConnection.getConnection();
String sql="select identifier,first_name,last_name,phone_no,join_date,hlcard_num from cust
omer where identifier='"+this.Identifier+"'";
ps = con.prepareStatement(sql);
rs = ps.executeQuery();
String rt=" ";
while (rs.next())
rt=rt+ "<tr><td>"+rs.getString("identifier")+"</td>";
rt=rt+ "<td>"+rs.getString("first_name")+"</td>";
rt=rt+ "<td>"+rs.getString("last_name")+"</td>";
rt=rt+ "<td>"+rs.getInt("phone_no")+"</td>";
rt=rt+ "<td>"+rs.getDate("join_date")+"</td>";
rt=rt+ "<td>"+rs.getString("hlcard_num")+"</td></tr>";
con.close();
return rt;
Please Help me where I am making mistake

Answer 1

in while loop how u r using <td> <tr>.............
no JSP tag close %> ....
abhishek