java - Java objects and GUI

Question

How would I begin to write a mortgage calculator that compiles and runs, but I would be bale to add a GUI to later without re-writing the initial code

Answer 1

使用模型-视图-控制器模式。 http://en.wikipedia.org/wiki/Model_view_controller

Answer 2

确保将计算抵押贷款的服务方法编写为reusable/ decoupled。这意味着不直接依赖于控制台输入/输出等。一旦存在，您可以使用它与 Swing GUI/Web 界面等一起使用。