org.jmlspecs.samples.prelimdesign
Class Point2D

java.lang.Object
  org.jmlspecs.samples.prelimdesign.Point2D

public class Point2D

extends Object

Class Specifications

public invariant !java.lang.Double.isNaN(this.x); public invariant !java.lang.Double.isNaN(this.y); public invariant !java.lang.Double.isInfinite(this.x); public invariant !java.lang.Double.isInfinite(this.y);

Specifications inherited from class Object

represents objectState <- org.jmlspecs.lang.JMLDataGroup.IT; public represents _getClass <- \typeof(this);

Model Field Summary

 

Model fields inherited from class java.lang.Object

_getClass, objectState, theString

 

Ghost Field Summary

 

Ghost fields inherited from class java.lang.Object

objectTimesFinalized, owner

 

Field Summary
[spec_public] private  double	x
[spec_public] private  double	y

 

Constructor Summary

Point2D()

Point2D(double xc, double yc)

 

Model Method Summary

 

Model methods inherited from class java.lang.Object

hashValue

 

Method Summary
double	getX()
double	getY()
void	moveX(double dx)
void	moveY(double dy)

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

x

private double x

Specifications: spec_public

y

private double y

Specifications: spec_public

Point2D

public Point2D()

Specifications:

ensures this.x == 0.0&&this.y == 0.0;

Point2D

public Point2D(double xc,
               double yc)

Specifications:

requires !java.lang.Double.isNaN(xc);
requires !java.lang.Double.isNaN(yc);
requires !java.lang.Double.isInfinite(xc);
requires !java.lang.Double.isInfinite(yc);
assignable x, y;
ensures this.x == xc&&this.y == yc;

getX

public double getX()

Specifications: pure

ensures \result == this.x;

getY

public double getY()

Specifications: pure

ensures \result == this.y;

moveX

public void moveX(double dx)

Specifications:

requires !java.lang.Double.isNaN(this.x+dx);
requires !java.lang.Double.isInfinite(this.x+dx);
assignable x;
ensures org.jmlspecs.models.JMLDouble.approximatelyEqualTo(this.x,\old(this.x+dx),1.0E-10);

moveY

public void moveY(double dy)

Specifications:

requires !java.lang.Double.isNaN(this.y+dy);
requires !java.lang.Double.isInfinite(this.y+dy);
assignable y;
ensures org.jmlspecs.models.JMLDouble.approximatelyEqualTo(this.y,\old(this.y+dy),1.0E-10);