Concurrent Programming with Java
Lab Manual, Version 1.0, F. Astha Ekadiyanto, 2002.

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Lab 1: Introduction to Lab. Environment and Object Orientation


SquareCell Class

The SquareCell Class is a subclass of Cell Class. It is a specialized cell which only handles square shape cells. Thus, there should be some overrides in the class definition to make it more specialized.

The special classification of a SquareCell Class is as follows:

These definitions can be implemented in Java Language as follows :

File name: SquareCell.java

Class Fields :

Class Constructors:

Class Methods:

import java.lang.Math;
/**
* A SquareCell
*
* @author CPwJ
* @version 1.0 (2002)
*/

public class SquareCell extends Cell
{
private static final double RATIO = 2; //ratio used in area calculation
private static final String CELLTYPE = "Square"; //type of cell shape
/**
* SquareCell constructor
* @param x Cell X coordinate
* @param y Cell Y coordinate
* @param r Cell Radius
*/

public SquareCell(double x, double y, double r)
{
super(x,y,r);
}
/**
* Calculate the area of a Square shape Cell
* @return the area of the Square Cell
*/
public double area(
)
{
return RATIO*getR()*getR();
}
/**
* Check whether a point is covered by the Square cell
* @param x The x point of access coordinate
* @param y The y point of access coordinate
* @return True/False
*/

public boolean coverage(double x, double y)
{
double xyLimit = getR()/Math.sqrt(2.0);
if ((Math.abs(x-getX()) > xyLimit) || (Math.abs(y-getY()) > xyLimit))
return false;
return true;
}
}
 

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