The app allows the user to add Cheques to an array list of type Cheque, show the cheques' dates $($without

duplication$)$ in a JList which enables the user to preview all the cheques that have the same date. As described below;

Add button:

o reads the required data from "add new Cheque" tab

o create a new Cheque object and add it to the array list; if the cheque is not already added

$($i$.$e$.$ chequeNo must be unique$)$

a$.$ if add is successful then show a note: "Cheque No$,$ no added"

b$.$ else show a note: "Cheque No$,$ no is already existed"

see the following figures: