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Sep 4th, 2007
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setters and getters

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This class was given to me. I need to work with JSP. Am I correct in thinking that I need to make the methods setters and getters for each method I need data from. And if so could you give me an example of one? Lets say I needed to get a random number to display in a jsp text box.
JSP Syntax (Toggle Plain Text)
  1. /*
  2.  * CreditCard.java
  3.  *
  4.  * Created on September 4, 2007, 11:49 AM
  5.  *
  6.  * To change this template, choose Tools | Template Manager
  7.  * and open the template in the editor.
  8.  */
  9.  
  10. package creditcardproject;
  11.  
  12.  
  13.  
  14. import java.io.File;
  15.  
  16. public class CreditCard {
  17.  
  18.     private long AccountNo;
  19.     private double CreditLimit;
  20.     public double TotalCharges;
  21.     public double TotalPayments;
  22.     public long accountVar;
  23.     private int TransResult;
  24.     private String TransErr;
  25.     private String log;
  26.     private File file;
  27.  
  28.     public int inval;
  29.     public long acctval;
  30.  
  31.     public CreditCard(long accountVar){
  32.         this.accountVar=accountVar;
  33.         AccountNo=acctval;
  34.         CreditLimit = 1000;
  35.         TotalCharges = 0;
  36.         TotalPayments =0;
  37.     }
  38.     public CreditCard( )  {
  39.         newAccount();
  40.         CreditLimit = 1000;
  41.         TotalCharges = 0;
  42.         TotalPayments =0;
  43.     }
  44.  
  45.     private void newAccount() {
  46.         double r = Math.random();
  47.         AccountNo = (long)(r * 100000000);
  48.     }
  49.  
  50.     public long accountNumber()  {
  51.         return AccountNo;
  52.     }
  53.  
  54.     public double creditLimit()  {
  55.         return CreditLimit;
  56.     }
  57.  
  58.     public void creditIncrease() {
  59.         TransResult = 0;
  60.         if (Math.random() > .25)
  61.             CreditLimit += 100;
  62.         else {
  63.             System.out.println("Sorry, credit increase not possible at this time.");
  64.             TransResult = 1;
  65.         }
  66.     }
  67.     public double Available() {
  68.         double Available = CreditLimit - ( TotalCharges - TotalPayments );
  69.         return Available;
  70.     }
  71.  
  72.     public double Balance() {
  73.         double Balance = ( TotalCharges - TotalPayments );
  74.         return Balance;
  75.     }
  76.     public void Transaction( double Amount, String Description ) {
  77.         TransResult = 0;
  78.  
  79.         if ( Amount == 0 ) {
  80.             TransResult = 1;
  81.             TransErr = "Transaction amount is 0.";
  82.             return;
  83.         }
  84.  
  85.  
  86.         if ( Amount > Available() ) {
  87.             TransResult = 1;
  88.             TransErr = "Transaction amount of $" + Amount + " has exceeded the available credit limit $" + 				Available();
  89.             return;
  90.         }
  91.  
  92.  
  93.         if ( Description == "" ) {
  94.             TransResult = 1;
  95.             TransErr = "No transaction description entered.";
  96.             return;
  97.         }
  98.  
  99.  
  100.         if ( Amount > 0 ) {
  101.             TotalCharges += Amount;
  102.             return;
  103.  
  104.         } else if ( Amount < 0 ) {
  105.  
  106.  
  107.             TotalPayments += -(Amount);
  108.  
  109.             return;
  110.  
  111.         }
  112.     }
  113. }




is this combination close to what I need?
JSP Syntax (Toggle Plain Text)
  1. private void setNewAccount() {
  2.         double r = Math.random();
  3.         AccountNo = (long)(r * 100000000);
  4.     }
JSP Syntax (Toggle Plain Text)
  1.     private long getNewAccount() {
  2.         return AccountNo;

along with
JSP Syntax (Toggle Plain Text)
  1.  <% if(request.getParameter("createacct" != null)){%>
  2.               <jsp:useBean id= "creditCardBean" class = "creditcardproject.CreditCard"/>
  3.               <jsp:getProperty name="creditCardBean" property="NewAccount" parameter/>
  4.           <%}%>
Last edited by ceyesuma; Sep 4th, 2007 at 10:10 pm.
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