OCLFiddle

package example.cd;

/** DefaultTypes below. 
  * Changes you make in this file, 
  * have no impact on the OCLFiddle.
 **/
classdiagram DefaultTypes {            
    public class Class;
    
    public class Object;
    public class Collection {
    boolean containsAll(Collection c);
    boolean contains(Collection c);
    int size();
    boolean isEmpty();
    Collection addAll(Collection c);
    }
    
    public class List extends Collection {
      boolean nonEmpty();
      List addAll(List c);
      Set asSet();
      List add(Object o);
    }
    
    public class Set extends Collection {
      Set addAll(Set c);
      List asList();
      Set add(Object o);
    }
    
    public class Optional {
    boolean isAbsent();
    boolean isPresent();
    }
    
    
    interface Number extends Amount;
    class Integer implements Number;
    class Double implements Number;
    class Float implements Number;
    class Boolean;
    class Character;
    class String {
    boolean contains(String s);
    String replaceAll(String s1, String s2);
    String replace(String s1, String s2);
    boolean endsWith(String s);
    }
    
    // support for units comes with the jscience library
    // http://jscience.org/api/javax/measure/quantity/Quantity.html
    interface Amount;
    class Acceleration implements Amount;
    class Angle implements Amount;
    class AmountOfSubstance implements Amount;
    class AngularAcceleration implements Amount;
    class AngularVelocity implements Amount;
    class Area implements Amount;
    class CatalyticActivity implements Amount;
    class DataAmount implements Amount;
    class DataRate implements Amount;
    class Dimensionless implements Amount;
    class Duration implements Amount;
    class DynamicViscosity implements Amount;
    class ElectricCapacitance implements Amount;
    class ElectricCharge implements Amount;
    class ElectricConductance implements Amount;
    class ElectricCurrent implements Amount;
    class ElectricInductance implements Amount;
    class ElectricPotential implements Amount;
    class ElectricResistance implements Amount;
    class Energy implements Amount;
    class Force implements Amount;
    class Frequency implements Amount;
    class Illuminance implements Amount;
    class KinematicViscosity implements Amount;
    class Length implements Amount;
    class LuminousFlux implements Amount;
    class LuminousIntensity implements Amount;
    class MagneticFlux implements Amount;
    class MagneticFluxDensity implements Amount;
    class Mass implements Amount;
    class MassFlowRate implements Amount;
    class Money implements Amount;
    class Power implements Amount;
    class Pressure implements Amount;
    class RadiationDoseAbsorbed implements Amount;
    class RadiationDoseEffective implements Amount;
    class RadioactiveActivity implements Amount;
    class SolidAngle implements Amount;
    class Temperature implements Amount;
    class Torque implements Amount;
    class Velocity implements Amount;
    class Volume implements Amount;
    class VolumetricDensity implements Amount;
    class VolumetricFlowRate implements Amount;

// http://jscience.org/api/org/jscience/geography/coordinates/Time.html
    class Time extends Duration;
}

Reload Class Diagram (CD code will be send to plant-uml server to create image)

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