src/ ├── Main.java # 程序入口 ├── model/ │ └── Contact.java # 联系人 JavaBean ├── components/ │ ├── ButtonAction.java # 接口：按钮行为 onPress() │ ├── PhoneButton.java # 抽象类 extends JButton（按钮基类） │ ├── NumberButton ...

This project is a robust desktop based Inventory Management System developed using the Java programming language. It is designed to automate and simplify inventory ...