public class AccountSelectClassController{

    //Our collection of the class/wrapper objects wrapAccount

    public List<wrapAccount> wrapAccountList {get; set;}

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    // 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 Account and a Boolean value

    public class wrapAccount {

        public Account acc {get; set;}

        public Boolean selected {get; set;}

        //This is the contructor method. When we create a new wrapAccount object we pass a Account that is set to the acc property. We also set the selected value to false

        public wrapAccount(Account a) {

            acc = a;

            selected = false;

        }

    }

}