Java Unit Converter

A Java Swing application for converting between volume, length, and temperature units with real-time calculations.

Demo and Interface

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Features

1. Volume Conversion

Convert between 13 volume units:

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

2. Length Conversion

Convert between 8 length units:

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

3. Temperature Conversion

Convert between 3 temperature units:

• Fahrenheit
• Celsius
• Kelvin

Usage Instructions

1. Select Conversion Type
   • Choose between Volume, Length, or Temperature using the tabbed interface.
2. Generate Conversion Box
   1. Select source unit from the first dropdown.
   2. Select target unit from the second dropdown.
   3. Click Generate Conversion.
   • Note: You will get an error message if both units are identical.
3. Real-time Conversion
   • Enter value in either field.
   • Automatic conversion appears in the other field.
   • Supports decimal values and negative numbers (- by itself becomes -1).

Installation & Running

1. Requirements
   • Java Development Kit (JDK) 8 or higher.
   • Project directory structure:

     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
     

2. Compile and Run

   javac *.java
   java App

3. Troubleshooting
   • Fonts not loading?
     • Verify the fonts/ directory exists and filenames match those referenced in App.java.
     • Check file read permissions (especially on UNIX systems).
   • Classpath errors?

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

   • GUI looks odd?
     • Ensure custom fonts loaded without errors.
     • Watch console for any error messages.

Font Attribution

This application uses the following fonts under the SIL Open Font License (OFL):

EB Garamond

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

Noto Sans

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

License Compliance

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

1. Including original font files without modification.
2. Bundling complete OFL license texts in font_licenses/.
3. Maintaining original copyright notices.
4. Not selling fonts independently of the application.
5. Providing clear attribution in documentation.

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