controller:
public class wrapperClassControllerTEST {

    transient List<cContact> contactList {get; set;}

    public List<cContact> getContacts() {
        if(contactList == null) {
            contactList = new List<cContact>();
            for(Contact c: [select Id, Name, Email, Phone from Contact limit 10]) {
                contactList.add(new cContact(c));
            }
        }
        return contactList;
    }

     public PageReference save() {  
            List<Contact> Cs = new List<Contact>();
            for(cContact cCon: getContacts()) {
                 Cs.add(cCon.con);
            }          
            update Cs;
            contactList = null;
            getContacts();
            return null;     
        }

    public PageReference processSelected() {
        List<Contact> selectedContacts = new List<Contact>();
        for(cContact cCon: getContacts()) {
            if(cCon.selected == true) {
                selectedContacts.add(cCon.con);
            }
        }
        System.debug('These are the selected Contacts...');
        for(Contact con: selectedContacts) {
            system.debug(con);
        }
        contactList=null; // we need this line if we performed a write operation  because getContacts gets a fresh list now
        return null;
    }

    // This is our wrapper/container class. A container class is a class, a data structure, or an abstract data type whose instances are collections of other objects. In this example a wrapper class contains both the standard salesforce object Contact and a Boolean value
    public class cContact {
       public Contact con {get; set;}
       public Boolean selected {get; set;}
        public cContact(Contact c) {
            con = c;
            selected = false;
        }
    }
}