Checkbox in DataTable

We have to use wrapper class for displaying the check box in a data table or page block table. I am providing sample code which creates new contact, save and delete selected contact records of respective Account.

Page:

Apex Code:

 
public class CustomAccountController {

    public Account acc{get;set;}
    private Id  AccId{get;set;}
    public List contactList{get;set;}
    public contact newCont{get;set;}
    
    class ContactWrapper{
        public Contact cont { get; set; }
        public boolean isSelected{ get; set; }
        ContactWrapper(Contact c) {
            cont = c;
            isSelected = false;
        }
    }
     
    
     
    public CustomAccountController() {
        try {
            AccId = ApexPages.currentPage().getParameters().get('id');
            if(AccId != null) {
                acc = [select Name,Description,NumberOfEmployees,Phone,Website,Industry from Account where id = :AccId]; 
                initContact(acc);
            } else {
                ApexPages.addmessage(new ApexPages.message(ApexPages.severity.Error, 'Please pass parameter to this page. For eg. /apex/CustomAccount?id=0019000000OKdsH'));
            }    
        } catch(Exception e) {
            apexPages.addMessages(e);
        }       
    }
    
    public void initContact(Account acc) {
        if(acc != null) {
            contactList = new  List();
            for(Contact c : [Select Id, FirstName, LastName, Email from Contact where AccountID =: acc.Id]) {
                contactList.add(new ContactWrapper(c));
            }
        }
    }
    public pageReference save() {
        try { 
            List contactToUpdate = new  List();
            for(ContactWrapper c: contactList) {
                if(c.isSelected) {
                    contactToUpdate.add(c.cont);
                }
            }      
            update contactToUpdate;
        } catch(Exception e) {
            apexPages.addMessages(e);
        }     
        return null; 
    }
    
    public pageReference delet() { 
        try {
            List contactToDelete = new  List();
            for(ContactWrapper c: contactList) {
                if(c.isSelected) {               
                    contactToDelete.add(c.cont);
                }
            }
            delete contactToDelete;
            initContact(acc);
        } catch(Exception e) {
            apexPages.addMessages(e);
        } 
        return null; 
    }     
    
    public pageReference newContact() { 
        newCont = new Contact(AccountId = accId);
        return null; 
    }  
    
    public pageReference saveNewContact() { 
        try {
            upsert newCont;
            newCont = null;
            initContact(acc);
        } catch(Exception e) {
            apexPages.addMessages(e);
        } 
        return null; 
    }   
}

Feel free to write your comment or mail me at sandeep.saini482@gmail.com for any further query.