File list (Check if you may need any files):
Exam1\.classpath
.....\.project
.....\bad-product-codes-1.dat
.....\bad-product-codes-2.dat
.....\.in\DataFormatException.class
.....\...\DiscountOrder.class
.....\...\DiscountsGUI$AddListener.class
.....\...\DiscountsGUI$AllProductsDiscountListener.class
.....\...\DiscountsGUI$DefaultDiscountListener.class
.....\...\DiscountsGUI$DeleteAllItemsListener.class
.....\...\DiscountsGUI$DisplaySalesListener.class
.....\...\DiscountsGUI$LoadProductsWithDiscountListener.class
.....\...\DiscountsGUI$RegisterSaleListener.class
.....\...\DiscountsGUI$SelectedProductsDiscountListener.class
.....\...\DiscountsGUI.class
.....\...\ProductsCollection.class
.....\coffee-product-codes.dat
.....\src\DataFormatException.java
.....\...\DiscountOrder.java
.....\...\DiscountsGUI.java
.....\...\ProductsCollection.java
.....\bin
.....\src
Exam1