CIS355A Week 6 Lab Database Objectives Add Persistent Data S

Cis355a Week 6 Labdatabaseobjectivesadd Persistent Data Storage To Yo

CIS355A Week 6 Lab—Database OBJECTIVES Add persistent data storage to your Week 5 Lab using the MySQL Database. PROBLEM: Stocks4U Portfolio Management System The portfolio management system you developed for Stocks4U needs the ability to save and restore a user’s data from a MySql Database. FUNCTIONAL REQUIREMENTS The functional requirements of the Stocks4U application have not changed, and the Graphical User Interface has not changed from Week 5. StockIO class Modify the StockIO class to read and write the stock information to and from a MySQL database. Called “StocksDB” This class should have two methods. getData—reads data from file, returns data in array list of stock objects saveData—writes data from an array list to the data base in proper format deleteStock—deletes the identified stock from the database updateStock—updates the identified stock in the database.

The database connection string will be stored as a constant in the StockIO class. GUI class Note that you will need to add an ArrayList to your GUI class to manage the data to/from the file. It will act as a parallel array to your DefaultListModel. Any time you add a stock, you must add it in BOTH places. Any time you remove a stock, you must remove it in BOTH places.

File—open should open the database, retrieve the existing records and display the existing records. File—save should save all records, new and old, back to the database. File—exit should exit the program. The total value of the portfolio should be displayed at all times and updated anytime a stock is added or removed. RUBRIC StockIO class getData method reads from database saveData method writes data to the database udpateStock method updates the identified stock to the database deleteStock method deletes the identified stock in the database 40 Code style 5 Lab Report 10 TOTAL 55 CODE STYLE REQUIREMENTS Include meaningful comments throughout your code. Use meaningful names for variables. Code must be properly indented. Include a comment header at beginning of each file, example below. / Program Name: ProgramName.java Programmer's Name: Student Name Program Description: Describe here what this program will do */ DELIVERABLES Submit as a SINGLE zip folder all Java files; and the Lab report. Follow assignment specification regarding class/method names. Note that your Java file name must match class name (DO NOT rename).

Paper For Above instruction

The objective of this lab assignment is to enhance the Stocks4U Portfolio Management System by integrating persistent data storage through a MySQL database. Previously, the system relied on file-based storage, but this update aims to enable seamless data saving and retrieval directly from a relational database, thereby improving data consistency, scalability, and usability.

The core functional requirements of the Stocks4U application remain unchanged, including the graphical user interface (GUI). The main modification involves the backend data handling class, StockIO, which needs to be adapted to interact with a MySQL database named “StocksDB.” Specifically, four critical methods in the StockIO class must be implemented or modified: getData, saveData, deleteStock, and updateStock.

The getData method will establish a connection to the MySQL database, execute a SELECT query to retrieve all stock records, and populate an ArrayList of stock objects. This method replaces the previous file-reading mechanism, aligning data retrieval directly from the database. Similarly, the saveData method will iterate through the current list of stocks and perform INSERT or UPDATE operations to store data consistently in the database, ensuring that new stocks are added and existing ones are updated appropriately.

The deleteStock method is responsible for removing a specified stock record from the database, utilizing a DELETE SQL command based on unique identifiers such as stock symbol or ID. Correspondingly, the updateStock method will modify an existing stock record’s data in the database, ensuring that any changes made in the application are reflected persistently.

Additional considerations include managing database connection strings within the StockIO class as constants for easy configuration. The GUI class will need to maintain a parallel ArrayList to manage the stock data, which should be synchronized with the displayed list model. Operations such as adding or removing stocks must update both the GUI’s data structures to maintain consistency.

File operations like open and save should now trigger database interactions—opening retrieves data from the database and populates the GUI, while saving commits all current stocks back to the database. Exiting the application remains straightforward but should ensure that all data is saved before closure.

From a coding standards perspective, the implementation must include meaningful inline comments, proper indentation, and clear variable naming conventions. Each Java source file should begin with a comment header detailing the program name, programmer’s name, and a brief description of its purpose.

Deliverables include a zipped package containing all Java source files with correctly matching class and file names, along with a comprehensive lab report detailing the implementation process, challenges faced, and how database integration was achieved. These files should adhere strictly to the naming conventions and class structures outlined in the assignment instructions.

References

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