Your system design should conform to the Open Closed Principle so that your design should easily support new functions (e.g. change of name of security) and securities, for example, creation of BankNote record which is a subclass of Security.
You MUST apply the following design patterns for your new system
Command pattern to provide the “create”, “display”, “deposit”, “withdraw”, “undo”,
“redo” and “show undo/redo list” functions
Factory pattern or Abstract Factory Pattern to create different Command objects and Security objects (e.g. Bond object, Stock object, etc.)
Memento pattern to provide “Undo” and “Redo” functions
4 freelancers are bidding on average $188 for this job
Hello sir/madam i have firm grasp in java programming and has a a lot of experience in it , i am pretty sure i can help you.Hope to see you in chat soon.