2021 Java Practice Project - Simple File Reader and Data Processor

Overview

This small Java project serves as a practice exercise to explore basic file operations, exception handling, and data manipulation in Java. The application reads from a simple text file containing details of individuals, processes the information, and performs basic filtering based on criteria.

Functionality

• Reading Data: The application reads data from people.txt using FileHelper, which stores each line as a string in a list.
• Data Conversion: PersonOperationHelper converts these string entries into Person objects, using a custom format specified in the text file.
• Error Handling: Implements custom exception handling for data conversion errors, particularly focusing on salary values.
• Data Filtering: The Main class includes a method to filter Person objects based on surname start, sex, and a limit to the number of results.

Usage

To run this application, compile and execute the Main.java. It requires no command line arguments but will automatically process data as per the hardcoded logic in the main method.

Project Structure

• src/com/company/Main.java: Contains the main method that orchestrates the reading of data from a file, processing it into Person objects, and filtering based on specific attributes.
• src/First/FileHelper.java: Handles reading lines from a file and storing them in a list.
• src/First/InvalidSalaryException.java: Custom exception class for handling invalid salary data.
• src/First/Person.java: Data model class representing an individual with attributes like name, surname, age, city, salary, and sex.
• src/First/PersonOperationHelper.java: Provides functionality to convert lines of text into Person objects.
• src/First/people.txt: Text file containing semi-colon separated values representing people.

Files:

• 📁 src
  • 📁 com
    • 📁 company
      • Main.java
  • 📁 First
    • FileHelper.java
    • InvalidSalaryException.java
    • people.txt
    • Person.java
    • PersonOperationHelper.java