Anyone shed some light on this???

Question

Hi there,
I have a class that returns a value based on a calculation with in the class
2 of the variables are called from a database, which is working however when I try to output the result on a jsp page ie. calling the property 'rating' I am told it is "null" on the page....
was wondering if sombody could review my code and make any suggestions as to where my problem lies .....
The variable amount is inputted by the user...
This is the class for calculating:
* Pressup.java
* Created on 29 April 2007, 13:03
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
* @author Hegstatic
*/package fitness;
import java.sql.*;
import java.text.*;
public class Pressup {
    /** Creates a new instance of Pressup */
   int age;
   int amount;
   String rating;
   String gender;
   Connection con;
   String error;
  public int getAge(String userName) throws SQLException, Exception{
                 if(con != null){
                 try{
                ResultSet rs;
                Statement stmt = con.createStatement();
               rs = stmt.executeQuery("SELECT age FROM gymuser WHERE Username= 'userName' ");
                while (rs.next()) {
               age = rs.getInt("age");
               return age;
               } catch(SQLException sqle){
               error = "SQLException: could not search gymuser";
                throw new Exception(error, sqle);
               catch(Exception e){
               error = "An exception occured while searching gymuser";
               throw new Exception(error);
                } else {
               error = "Exception: connection to database was lost";
               throw new Exception(error);}
    public void setAge(int age)
        this.age = age;
        System.out.println(age);
    public String getGender(String userName) throws SQLException, Exception{
                 if(con != null){
                 try{
                ResultSet rs;
                Statement stmt = con.createStatement();
               rs = stmt.executeQuery("SELECT gender FROM gymuser WHERE Username= 'userName' ");
                while (rs.next()) {
               gender = rs.getString("gender");
               return gender;
               } catch(SQLException sqle){
               error = "SQLException: could not search gymuser";
                throw new Exception(error, sqle);
               catch(Exception e){
               error = "An exception occured while searching gymuser";
               throw new Exception(error);
                } else {
               error = "Exception: connection to database was lost";
               throw new Exception(error);}
                public void setGender(String gender){
                    this.gender = gender;
   public int getAmount()
    return amount;
   public void setAmount(int amount)
       this.amount = amount;
   public String getRating()
   { if (String.valueOf(gender) == "male")
            if (age>= 0 && age <= 29 && amount >=55 ) {
                rating = "Excellent";
            } else if (age>= 0 && age <= 29 && amount >=45 && amount <=54 ) {
                rating = "Good";
            } else if (age>= 0 && age <= 29 && amount >=35 && amount <=44 ) {
                 rating = "Average";
            } else if (age>= 0 && age <= 29 && amount >=20 && amount <=34 ) {
                rating = "Fair";
            }else if (age>= 0 && age <= 29 && amount >=0 && amount <=19 ) {
                 rating = "Poor";
            } else if(age>= 30 && age <=39 && amount >=45) {
                rating = "Excellent";
            } else if(age>= 30 && age <=39 && amount >=35 && amount <=44) {
                rating = "Good";
            } else if(age>= 30 && age <=39 && amount >=25 && amount <=34) {
                rating = "Average";
            } else if(age>= 30 && age <=39 && amount >=15 && amount <=24) {
                rating = "Fair";
            } else if(age>= 30 && age <=39 && amount >=0 && amount <=14)  {
                rating = "Poor";
            } else if(age>= 40 && age >=49 && amount >=40) {
                rating = "Excellent";
            } else if(age>= 40 && age <=49 && amount >=30 && amount <=39) {
                rating = "Good";
            } else if(age>= 40 && age <=49 && amount >=20 && amount <=29) {
                rating = "Average";
             } else if(age>= 40 && age <=49 && amount >=12 && amount <=19) {
                rating = "Fair";   
            } else if(age>= 40 && age <=49 && amount >=0 && amount <=11) {
                rating = "Poor";
            } else if(age>= 50 && age <=59 && amount >=35) {
                rating = "Excellent";
            } else if(age>= 50 && age <=59 && amount >=25 && amount <=34) {
                rating = "Excellent";
              } else if(age>= 50 && age <=59 && amount >=15 && amount <=24) {
                 rating = "Average";
                 else if(age>= 50 && age <=59 && amount >=8 && amount <=14) {
                   rating = "Fair";
                } else if(age>= 50 && age <=59 && amount >=0 && amount <=7) {
                    rating = "Poor";
                }  else if(age>= 60 && age <=79 && amount >=30) {
                    rating = "Excellent";
                 } else if(age>= 60 && age <=79 && amount >=20 && amount <=29) {
                    rating = "Good";
                 } else if(age>= 60 && age <=79 && amount >=10 && amount <=19) {
                    rating = "Average";
                } else if(age>= 60 && age <=79 && amount >=5 && amount <=9) {
                rating = "Fair";
                } else if(age>= 60 && age <=79 && amount >=0 && amount <=4) {
                rating = "Poor";
     else if (String.valueOf(gender) == "female")
                if (age>= 0 && age <=29 && amount >=49) {
                rating = "Excellent";
                }else if (age>= 0 && age <=29 && amount >=34 && amount <=48) {
                rating = "Good";
                }else if (age>= 0 && age <=29 && amount >=17 && amount <=33) {
                 rating = "Average";
                }else if (age>= 0 && age <=29 && amount >=6 && amount <=16) {
                rating = "Fair";
                }else if (age>= 0 && age <=29 && amount >=0 && amount <=5) {
                rating = "Poor";
                }else if (age>= 30 && age <=39 && amount >=40) {
                rating = "Excellent";
                }else if (age>= 30 && age <=39 && amount >=25 && amount <=35) {
                rating = "Good";
                }else if (age>= 30 && age <=39 && amount >=12 && amount <=24) {
                 rating = "Average";
                }else if (age>= 30 && age <=39 && amount >=4 && amount <=11) {
                rating = "Fair";
                }else if (age>= 30 && age <=39 && amount >=0 && amount <=3) {
                rating = "Poor";
                }else if (age>= 40 && age <=49 && amount >=35) {
                rating = "Excellent";
                }else if (age>= 40 && age <=49 && amount >=20 && amount <=34) {
                rating = "Good";
                }else if (age>= 40 && age <=49 && amount >=8 && amount <=19) {
                rating = "Average";
                }else if (age>= 40 && age <=49 && amount >=3 && amount <=7) {
                rating = "Fair";
                 }else if (age>= 40 && age <=49 && amount >=0 && amount <=2) {
                rating = "Poor";
                }else if (age>= 50 && age <=59 && amount >=30) {
                rating = "Excellent";
                }else if (age>= 50 && age <=59 && amount >=15 && amount <=29) {
                rating = "Good";
                }else if (age>= 50 && age <=59 && amount >=6 && amount <=14) {
                rating = "Average";
                } else if (age>= 50 && age <=59 && amount >=2 && amount <=5) {
                rating = "Fair";
                }else if (age>= 50 && age <=59 && amount >=0 && amount <=1) {
                 rating = "Poor";
                }else if (age>= 60 && age <=69 && amount >=30) {
                rating = "Excellent";
                }else if (age>= 60 && age <=69 && amount >=20 && amount <=29) {
                rating = "Good";
                }else if (age>= 60 && age <=69 && amount >=11 && amount <=19) {
                rating = "Average";
                }else if (age>= 60 && age <=69 && amount >=5 && amount <=10) {
                rating = "Fair";
                }else if (age>= 60 && age <=69 && amount >=0 && amount <=4) {
                rating = "Poor";
            return rating;
       public void setRating(String rating)
           this.rating = rating;
   }This is the jsp page im calling the value from :
<!--Here the user calls either the newEmployer or newStudent methhods from the DBQuery, depending on the user type-->
<%@page contentType="text/html"%>
<%@page import="java.sql.*, fitness.*"%>
<jsp:useBean id="pressup" scope= "session" class="fitness.Pressup" />
<jsp:useBean id="currentuser" scope="session" class="fitness.currentuserBean" />
<jsp:setProperty name="pressup" property="amount" param="amount" />
<html>
    <head><title>Press up</title></head>
    <body>
                Your Pressup rating is<jsp:getProperty name="pressup" property="rating" />
               <form action="Pressupupdate.jsp" method = post /> <input type="submit"  value="Save and Move on" />
   </form>
         </body>
     </html>The comes up reading "Your Pressup rating is null"
Again any help would be greatly appreciated....
Thanks,
Heg

Answer 1

rs = stmt.executeQuery("SELECT gender FROM gymuser WHERE Username= 'userName' ");
in this line i think there is some error put it like this
rs = stmt.executeQuery("SELECT gender FROM gymuser WHERE Username= '"+userName+"' ");
Try to put some SOPs in between, so that u can check in logs(if using tomcat)where u r making mistake.