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java program

该项目收到10 来自天才威客的竞标,平均竞标价格为$178 HKD

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项目预算
$80 - $240 HKD
全部竞标
10
项目描述

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

需要技能

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