Example Programs using List, Apex and Visualforce

Example Programs using List, Apex and Visualforce

List of objects demo: 

        Public class example { 
        Public list <account> result {set; get;} 
        Public list example () 
               { 
         Account a1 = new account (name = ‘Sam’ industry = ‘banking’) 
         Account a2 = new account (name = ‘ram’ industry = ‘energy); 
                result = new list <account> (); 
                result. add (a1); 
                result. add (a2); 
                      } 
                  }
               <apex: page controller = “list example”> 
               <apex: page Block> 
               <apex: page block Table> 
               <apex: page> 

Create a list of apex class object:
1. Student apex:
Global student 
   { 
    Public string name {get; set;} 
    Public integer age {get; set;} 
    Public student (string name, integer age) 
            { 
              This. name = name; 
               This. age = age; 
                         }
                 }  

2. List example apex: 
Public class list example 
    { 
     Public list <student> result {set; get;}
     Public list example (). 
            { 
             result = new list <student> ();
student s1 = new student (‘sam’,20);  
student s2 = new student (‘Ram’,40); 
student s3 = new student (Praveen’,40); 
           result. add (s1); 
           result. add (s2); 
           result. add(s3); 
                   }
             } 

List example visual force:
<apex: page controller = “List example”> 
<apex: page block> 
<apex: page block Table value = ‘’ {! Result} “var= ‘a’> 
<apex: column value = “{! a.name}’/>
<apex: column value = “{! a. age}”/> 
<apex:  page block Table> 
<apex: page> 

Write an apex program to generate list of select options: 

Public class list select 
         { 
          Public string my val {get; set;} 
Public list < select option > my option; 
Public list <select option > get my options () 
 { 
   Return my options; 
      } 
   Public List select () 
          { 
My options = new List <select option> (); 
Select option s = new selection (‘null’,’-none- ‘); 
Select option s1 = new select option (‘one’, ‘Jan’); 
My options. add (s); 
My options. add (s1); 
My options. Add (new select option (‘two’,’feb’); 
My options. add (new select option (‘three’, ‘mar’); 
                   } 
              } 
<apex: page controller = “list select”>
<apex: from> 
<apex: select list size = “1” value = “{! my value}”/
<apex: select options value = “{! My options} “/> 
<apex: action support event =” unchanged’’ retender = “one”/> 
<apex: select List> 
<apex: output label id = “one” > you have selected {! My val}
<apex: output label>
<apex: from>
<apex: page>