| Java Source Code / Java Documentation » Science » jscience 4.3.1 » javax.measure.unit |
| javax.measure.unit | ||
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Provides support for programatic unit handling. Standart/NonStandard UnitsStandard units and prefixes are provided by the {@link javax.measure.unit.SI SI} class (Système International d'Unités) and about 50 non-standard units are available through the {@link javax.measure.unit.NonSI NonSI} class.Usage examples:[code] import javax.measure.Scalar; import javax.measure.Measure; import javax.measure.unit.*; import javax.measure.quantity.*; import static javax.measure.unit.SI.*; import static javax.measure.unit.NonSI.*; import static javax.measure.unit.Dimension.*; public class Main { public void main(String[] args) { // Conversion between units. System.out.println(KILO(METRE).getConverterTo(MILE).convert(10)); // Retrieval of the system unit (identifies the measurement type). System.out.println(REVOLUTION.divide(MINUTE).getSystemUnit()); // Dimension checking (allows/disallows conversions) System.out.println(ELECTRON_VOLT.isCompatible(WATT.times(HOUR))); // Retrieval of the unit dimension (depends upon the current model). System.out.println(ELECTRON_VOLT.getDimension()); } } > 6.2137119223733395 > rad/s > true > [L]²·[M]/[T]² [/code]Unit ParameterizationUnits are parameterized (<Q extends {@link javax.measure.quantity.Quantity Quantity}>) to enforce compile-time checks of units/measures consistency, for example:[code] UnitUML Diagram
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| Java Source File Name | Type | Comment |
| AlternateUnit.java | Class | |
| BaseUnit.java | Class | This class represents the building blocks on top of which all others units are created. |
| CompoundUnit.java | Class | This class represents the multi-radix units (such as "hour:min:sec"). |
| DerivedUnit.java | Class | |
| Dimension.java | Class | This class represents the dimension of an unit. |
| NonSI.java | Class | |
| ProductUnit.java | Class | This class represents units formed by the product of rational powers of existing units. This class maintains the canonical form of this product (simplest form after factorization). |
| SI.java | Class | This class contains SI (Système International d'Unités) base units, and derived units. It also defines the 20 SI prefixes used to form decimal multiples and submultiples of SI units. |
| SystemOfUnits.java | Class | This class represents a system of units, it groups units together for historical or cultural reasons. |
| TransformedUnit.java | Class | This class represents the units derived from other units using UnitConverter converters . Examples of transformed units:[code] CELSIUS = KELVIN.add(273.15); FOOT = METER.multiply(0.3048); MILLISECOND = MILLI(SECOND); [/code] Transformed units have no label. |
| Unit.java | Class | This class represents a determinate javax.measure.quantity.Quantityquantity (as of length, time, heat, or value) adopted as a standard of measurement. It is helpful to think of instances of this class as recording the history by which they are created. |
| UnitFormat.java | Class | This class provides the interface for formatting and parsing Unit units . For all SI units, the 20 SI prefixes used to form decimal multiples and sub-multiples of SI units are recognized. NonSI units are directly recognized. |