Java Unit Converter is a lightweight desktop tool built with pure Java Swing that allows users to convert between common units instantly.
It focuses on clarity, correctness, and ease of use, without external dependencies.

✔ Real-time bidirectional conversion
✔ Simple tab-based UI
✔ Custom typography using open-source fonts
✔ No libraries, no frameworks — just Java

Convert between 13 volume units:

• Gallons, Quarts, Pints
• U.S. Cups, Tablespoons, Teaspoons
• Cubic Inches, Feet, Yards
• Liters, Milliliters
• Cubic Meters, Cubic Centimeters

Convert between 8 length units:

• Miles, Yards, Feet, Inches
• Meters, Kilometers, Centimeters
• Nautical Miles

Convert between 3 temperature scales:

• Fahrenheit
• Celsius
• Kelvin

1. Select a conversion category
   Choose Volume, Length, or Temperature using tabs.

2. Generate a conversion box

   • Select a source unit
   • Select a target unit
   • Click Generate Conversion

   Identical unit selections are blocked with a clear error message.

3. Convert in real time

   • Enter a value in either field
   • The converted value updates instantly
   • Supports decimals and negatives
     (- alone is treated as -1 for convenience)

• Java Development Kit (JDK) 8+
• No external dependencies

Java-unit-converter/
├── App.java
├── fonts/
│   ├── NotoSans-Regular.ttf
│   ├── NotoSans-Bold.ttf
│   └── EBGaramond-Regular.ttf
└── font_licenses/
    ├── OFL-Noto_Sans.txt
    └── OFL-EB_Garamond.txt

javac *.java
java App

Fonts not loading?

• Ensure fonts/ exists and filenames match those in App.java
• Check file read permissions (especially on Linux/macOS)

Classpath errors?

javac -cp . *.java
java -cp . App

UI looks incorrect?

• Check console logs for font loading errors
• Verify font paths are correct

This project uses fonts licensed under the SIL Open Font License (OFL).

• Author: Georg Duffner
• Source: https://github.com/octaviopardo/EBGaramond12
• License: font_licenses/OFL-EB_Garamond.txt

• Author: Google Inc.
• Source: https://github.com/notofonts/latin-greek-cyrillic
• License: font_licenses/OFL-Noto_Sans.txt

This project complies with Apache License 2.0 and SIL OFL by:

1. Including unmodified font files
2. Bundling full license texts
3. Preserving copyright notices
4. Not redistributing fonts independently
5. Providing clear attribution

Contributions, bug reports, and suggestions are welcome.
If you find this project useful, please consider starring ⭐ the repository — it helps others discover it.

© 2025 richie-rich90454