Data Visualization Software

Java Developer Week 3 Project

Project Overview

This is a comprehensive Data Visualization Software built in Java that allows users to:

• Import data from CSV and JSON files
• Process and clean data automatically
• Create interactive visualizations (Bar Chart, Line Chart, Pie Chart, Histogram)
• Customize chart appearance
• Export charts as PNG images

Features Implemented

1. Data Input and Processing

• ✅ CSV file reader with proper parsing
• ✅ JSON file reader with object array support
• ✅ Data cleaning and validation
• ✅ Automatic data type detection
• ✅ Missing data handling

2. Visualization Components

• ✅ Bar Chart - Compare categories
• ✅ Line Chart - Show trends
• ✅ Pie Chart - Display proportions
• ✅ Histogram - Data distribution
• ✅ Interactive charts with zoom and pan
• ✅ Customizable titles and labels

3. User Interface

• ✅ Intuitive GUI with Swing
• ✅ File chooser for easy data import
• ✅ Chart type selector
• ✅ Column selectors for flexible visualization
• ✅ Title customization
• ✅ Export functionality
• ✅ Information panel with data statistics

Requirements

• Java JDK 11 or higher
• Maven (for building)

Project Structure

DataVisualizationSoftware/
├── src/main/java/com/datavis/
│   ├── Main.java                           # Application entry point
│   ├── model/
│   │   └── DataModel.java                  # Data storage model
│   ├── dataprocessing/
│   │   ├── DataReader.java                 # Interface for file readers
│   │   ├── CSVDataReader.java              # CSV file parser
│   │   ├── JSONDataReader.java             # JSON file parser
│   │   └── DataProcessor.java              # Data cleaning and validation
│   ├── visualization/
│   │   └── ChartFactory.java               # Chart generation
│   └── ui/
│       └── MainWindow.java                 # Main application window
├── data/
│   ├── sample_sales.csv                    # Sample CSV data
│   └── sample_weather.json                 # Sample JSON data
└── pom.xml                                 # Maven build configuration

How to Build and Run

Option 1: Using Maven (Recommended)

1. Build the project:

   mvn clean package

2. Run the application:

   java -jar target/DataVisualizationSoftware-1.0-jar-with-dependencies.jar

Option 2: Using IDE (IntelliJ IDEA / Eclipse)

1. Open the project folder in your IDE
2. Let Maven download dependencies automatically
3. Run the Main.java file

Option 3: Manual Compilation

1. Download JFreeChart library:

   • Download jfreechart-1.5.3.jar
   • Place it in the lib/ folder

2. Compile:

   javac -cp "lib/*" -d bin src/main/java/com/datavis/**/*.java

3. Run:

   java -cp "bin:lib/*" com.datavis.Main

How to Use the Application

1. Launch the Application

   • Run the JAR file or Main.java

2. Load Data

   • Click "Load Data File" button
   • Select a CSV or JSON file
   • Sample files are provided in the data/ folder

3. Configure Visualization

   • Choose chart type from dropdown
   • Select category column (X-axis)
   • Select value column (Y-axis)
   • Enter a custom title (optional)

4. Generate Chart

   • Click "Generate Chart" button
   • Chart will appear in the center panel
   • You can interact with the chart (zoom, pan)

5. Export Chart

   • Click "Export as PNG" button
   • Choose save location
   • Chart will be saved as PNG image

6. Clear and Start Over

   • Click "Clear" button to reset

Sample Data Files Included

sample_sales.csv

• Product sales data with revenue information
• Good for: Bar charts, Pie charts

sample_weather.json

• Monthly weather data (temperature and rainfall)
• Good for: Line charts, Histograms

Key Technologies Used

• Java 11
• Swing (GUI framework)
• JFreeChart (Chart library)
• Maven (Build tool)

Project Objectives Met

✅ Data Input and Processing:

• Multiple format support (CSV, JSON)
• Data cleaning algorithms
• Type detection and validation

✅ Visualization Components:

• 4 different chart types
• Interactive and customizable
• Professional appearance

✅ User Interface:

• Clean and intuitive design
• Easy-to-use controls
• Real-time feedback
• Export functionality

Troubleshooting

Issue: "No main manifest attribute"

• Solution: Use the jar-with-dependencies version

Issue: Charts not displaying

• Solution: Ensure data has at least 2 columns and numeric values

Issue: File not loading

• Solution: Check file format (must be valid CSV or JSON)

Future Enhancements (Optional)

• Additional chart types (Scatter plot, Area chart)
• Database connectivity
• Real-time data updates
• Multiple data series support
• Advanced statistics
• Theme customization

Credits

Developed as part of Java Developer Internship - Week 3 Project Data Visualization Software v1.0

License

This project is created for educational purposes as part of an internship assignment.