Autoboxing-Unboxing-challenge

/**
 * You job is to create a simple banking application.
 * There should be a Bank class
 * It should have an arraylist of Branches
 * Each Branch should have an arraylist of Customers
 * The Customer class should have an arraylist of Doubles (transactions)
 * Customer:
 * - Name, and the ArrayList of doubles.
 * Branch:
 * - Need to be able to add a new customer and initial transaction amount.
 * - Also needs to add additional transactions for that customer/branch
 * Bank:
 * - Add a new branch
 * - Add a customer to that branch with initial transaction
 * - Add a transaction for an existing customer for that branch
 * - Show a list of customers for a particular branch and optionally a list of their transactions
 * Demonstration autoboxing and unboxing in your code
 * Hint: Transactions
 * Add data validation.
 * e.g. check if exists, or does not exist, etc.
 * Think about where you are adding the code to perform certain actions
 */