Inner Wrapper Class in Apex Class

Hi,

I have seen a lot of questions regarding inner class in a apex class in developer community and issues that can be solved by use of inner class. So here I would like to show a problem which can also be solved by inner class.

Syntax of inner class :

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1. public class myOuterClass {  
2.    // Additional myOuterClass code here    
3.       
4.    class myInnerClass {  
5.      // myInnerClass code here    
6.       
7.    }  
8. }  

Problem : 
http://boards.developerforce.com/t5/General-Development/When-i-click-on-add-button-i-need-to-display-one-more-textbox/td-p/286261

When i click on add button i need to display one more textbox 

Visual Force Page :

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1. <apex:page controller="addTextrBox">  
2.   <apex:Form>  
3.        <apex:commandButton Value="Add Text Box" action="{!addTextBox}"/>  
4.          
5. </br>  
6.        <apex:repeat value="{!listvalueOfTextBox}" var="item" rendered="{!IF(listvalueOfTextBox.size > 0 , true , false)}" >  
7.            <apex:outPutLabel value="{!item.textBoxLabel}">  
8.            </apex:outPutLabel>  
9.            <apex:inputText value="{!item.textBoxValue}"/>  
10.              
11. </br>  
12.        </apex:repeat>  
13.    </apex:Form>  
14. </apex:page>  

Apex Controller Class

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1. public class addTextrBox   
2. {  
3.   
4.     public List<textBoxClass> listValueOfTextBox  
5.         {   
6.           get;   
7.           set;   
8.         }      
9.     public addTextrBox ()  
10.         {  
11.             listvalueOfTextBox = new List<textBoxClass>();  
12.         }  
13.     public PageReference addTextBox()   
14.         {  
15.             try  
16.                 {  
17.                     listvalueOfTextBox.add(new textBoxClass('TextBox' + (listvalueOfTextBox.size() +  1)));  
18.                 }  
19.             catch(Exception e)  
20.                 {  
21.                     ApexPages.addMessages(e);  
22.                 }  
23.             return ApexPages.currentPage();  
24.         }  
25.   
26.      public class textBoxClass  
27.          {  
28.              public string textBoxLabel{get;set;}  
29.              public string textBoxValue{get;set;}  
30.                
31.              public textBoxClass(String textBoxLabel)  
32.                  {  
33.                      this.textBoxLabel = textBoxLabel;  
34.                  }  
35.          }  
36. }  

Here textBoxClass is the inner class

In above problem we used iner class now any new text box is binded with a new item in the list listvalueOfTextBox which is of type textBoxClass.

inner class acan be intancitiated like this
outerClass.innerclass instanceOfinnerClass = new outerClass.innerclass();

in above case it will be like
addTextrBox.textBoxClass instaceOftextBoxClass = new addTextrBox.textBoxClass('Test text Box');

Regards,
Ashok.