Java library for creating and manipulating dimensional units of measurement.

Usage

Unit kilometer = Units.kilo(Units.METER);
Unit kilometerPerHour = Units.newUnit()  
    .ofDimension(Dimensions.VELOCITY)  
    .as(kilometer).divide(Units.HOUR)  
    .withSymbol("kph").create();
Unit mile = Units.newUnit()  
    .ofDimension(Dimensions.LENGTH)  
    .asExactly(5280).ofA(Units.FOOT)  
    .create();

Expression distance = Expressions.take(7, mile);
Expression time = Expressions.take("16.09344", Units.MINUTE);
Expression speed = distance.divide(time);

Measure<DoubleField> m = speed.using(DoubleField.factory());

System.out.println(m.as(kilometerPerHour).toString());  //prints "42.0 kph"

Features

• Easily create and localiz/se your own units.
• Dimensional commensurability checking at runtime.
• Basic arithmetic (add, subtract, multiply, and divide) on measurements.
• Use your own numerical implementation -- calculations are performed exactly to the precision of your choice.
• All classes are immutable and thread-safe.

Getting Started

how to:	code:
create dimension	Dimensions.newDimension()
create unit	Units.newUnit()
create measurement/expression	Expressions.take(...)
manipulate measurement	Measure<?> m; m.add(...) m.subtract(...) m.multiply(...) m.divide(...)
convert unit	m.as(unit)

Advanced Features

• Make your code numerical implementation agnostic using the Scalar and Expression classes.
• Represent measurements in alternative scales (e.g. °F, dB) using Scales.
• Implement your own number type by implementing Field, and use it in concrete calculations of measurements.