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Assignment: GUI Design, data validation, exception handling and Text I/O
Description: Develop a GUI application to manage product file.
For each product following information is kept:- Product id (integer and unique)- Product name- Product price (double and positive)- Quantity on hand (integer)User should be able to perform the following operations:- Add new product, only if all the valid information is provided- Modify existing product using product idGrading: The application will be evaluated based upon the following criteria:- GUI Designo Designed using suitable GUI controls i.e. labels, text boxes and buttons o Menu/Menu options are provided for most operations o Access keys are implemented for most of the GUI controls- Text File I/O o Adding new product o Modify existing product using product id - Data validation o Provided the needed data validation and proper feedback to the user
Hint: For the best implementation create and use the following classes:- Design the GUI as it was done in class activity- Product Classo Add all the attributeso Add all the set/get methods with the data validationo Provide default as well as parametrized constructorso Override toString method to return the string representation of the product classo Override equals method to compare the two products are equal if id is same- ProductDB Classo Attribute for the file name and arraylisto Add all the set/get methodso Implement Singleton design pattern (optional)o Provide method to add a product passed to it to the arraylist (call this method with the Add product button)o Provide method to find a product from the arraylist using product id (call this method with the find product button)o Save method to save the arraylist to the file (call this method with the Save menu option)o Load method to load the data from the file to arraylist (call this method with the Load menu option)
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