Workshop 2 CT619

This document is about Workshop 2 CT619 by Alan Burke. It includes the code and explanations for the Rectangle class and its testing using the RectangleTest class. It also includes the Cartesian Rectangle class and its testing using the RectangleTest class.

Worshop 2 CT619-Alan Burke
Diploma in Software Engineering
Student Name: Alan Burke
NUI Galway ID Number: 04417461
Course: CT619- Object Orientated Programming
Workshop No: Week 02
Assignments: Workshop 2- Questions 1-3
Date of Submission: 23/03/19
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Worshop 2 CT619-Alan Burke
Table of Contents
Class Rectangle Test..............................................................................................................................3
Cartesian Rectangle Test.......................................................................................................................3
Code:.....................................................................................................................................................4
Class Rectangle..................................................................................................................................4
RectangleTest....................................................................................................................................6
Cartesian Rectangle...........................................................................................................................6
RectangleTest..................................................................................................................................10
References...........................................................................................................................................11
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Worshop 2 CT619-Alan Burke
Class Rectangle Test
Testing completed using RectangleTest class
Parameters set as per below:
Cartesian Rectangle Test
Testing completed to RectangleTest class
Parameters set as per below:
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Worshop 2 CT619-Alan Burke
Code:
Class Rectangle
import javax.swing.JOptionPane;
// Rectangle Class //
public class Rectangle {
private float length, width; // define the variables for the
dimensions
public Rectangle ()
{
length = 1; // Variable initialised to 1
width =1;
}
public float area () // calculate the area
{
float area = (length * width);
return area;
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Worshop 2 CT619-Alan Burke
/* JOptionPane.showMessageDialog(null, "Area of the Rectangle
is "+ area);*/ //* get the area of the rectangle
}
public float perimeter () //calculate the perimeter
{
float perimeter; //perimeter variable
perimeter = (2* length) + (2 * width);
return perimeter;
/* JOptionPane.showMessageDialog(null, "perimeter of the
rectangle is " + perimeter); */ //* display the perimeter of the rectangle
}
public Rectangle (float l, float w) //set the length and width of the
rectangle
{
length = ((l > 0.0 && l <20.0) ? l:(float) 0.0); // validate
the dimensions of the length and width, set to 0 if outside defined ranges
width = ((w > 0.0 && w < 20.0) ? w:(float) 0.0);
}
public float getlength () //get length
{
return length;
}
public float getwidth () //get width
{
return width;
}
public String toString () //set values into a string format
{
if (length ==0 || width ==0 ) //check errors, if length / width
entered are 0 display error message.
{
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Worshop 2 CT619-Alan Burke
return ("Incorrect information has been submitted. Please re assess
the values of length and width");
}
else
{
return String.format( "%s: %f\n%s: %f\n%s: %f\n%s: %f", /*
string format to output the required data */
"Length", length, "Width", width,
"Perimeter", perimeter(), "Area", area() );
}
}
}
RectangleTest
import javax.swing.JOptionPane;
public class RectangleTest {
public static void main(String[] args) {
Rectangle myR1 = new Rectangle(); //check default rectangle 1
Rectangle myR2 = new Rectangle ((float) 5.0, (float) 6.0);
//check integer types rectangle 2
Rectangle myR3 = new Rectangle ((float) 12.23, (float) 11.11);
//check float types rectangle 3
Rectangle myR4 = new Rectangle ((float) 21, (float) 19.999);
//check error handling rectangle 4
System.out.println("Information for Rectangle 1 \n" +
myR1.toString());
System.out.println("\nInformation for Rectangle 2 \n" +
myR2.toString());
System.out.println("\nInformation for Rectangle 3 \n" +
myR3.toString());
System.out.println("\nInformation for Rectangle 4 \n"
+myR4.toString());
}
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Worshop 2 CT619-Alan Burke
}
Cartesian Rectangle
import javax.swing.JOptionPane;
/* Initial Rectangle Class */
public class Rectangle {
// declare the variables
private float x1, y1;
private float x2, y2;
private float x3, y3;
private float x4, y4;
public Rectangle() //set the initial dimensions
{
setDimension( 1, 1, 5, 1, 5, 4, 1, 4 );
}
public Rectangle (float x1, float y1, float x2, float y2, float x3,
float y3, float x4, float y4) //input to allow for setting the coordinates
{
setDimension ((float) x1, (float) y1, (float)x2, (float) y2,
(float) x3, (float) y3, (float) x4, (float) y4); //call to set the
dimensions of the rectangle
}
public void setDimension( float dimx1, float dimy1,
float dimx2, float dimy2, float dimx3,
float dimy3, float dimx4, float dimy4 )
{
x1 = ( dimx1 >= 0.0 && dimx1 <= 20.0 ? dimx1 : 0 );
//reset the coordinate if it is not within the ranges of the
y1 = ( dimy1 >= 0.0 && dimy1 <= 20.0 ? dimy1 : 0 );
x2 = ( dimx2 >= 0.0 && dimx2 <= 20.0 ? dimx2 : 0 );
y2 = ( dimy2 >= 0.0 && dimy2 <= 20.0 ? dimy2 : 0 );
x3 = ( dimx3 >= 0.0 && dimx3 <= 20.0 ? dimx3 : 0 );
y3 = ( dimy3 >= 0.0 && dimy3 <= 20.0 ? dimy3 : 0 );
x4 = ( dimx4 >= 0.0 && dimx4 <= 20.0 ? dimx4 : 0 );
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Worshop 2 CT619-Alan Burke
y4 = ( dimy4 >= 0.0 && dimy4 <= 20.0 ? dimy4 : 0 );
}
// end method setCoordinates
public float length( float Lx1, float Ly1, float Lx2, float Ly2 )
//get the length of the sides. Equation used is the square root of (the
sides squares)
{
return (float) Math.sqrt( ( Math.pow( Lx1 - Lx2, 2 )
+ Math.pow( Ly1 - Ly2, 2 ) ) );
}
public boolean isRectangle() //check to ensure the coordinates are a
rectangle
{
float sideA = length( x1, y1, x2, y2 );
float sideB = length( x2, y2, x3, y3 );
float sideC = length (x3,y3, x4, y4);
float sideD = length (x4,y4, x1,y1);
if ( (sideA + sideB ==
sideB + sideC) )
return true;
else
return false;
}
public boolean isSquare () //check to see if the object is a square
{
return (getLength() == getWidth());
}
public float getLength() //get the length of the rectangle
{
float length1;
float sideA = length( x1, y1, x2, y2 );
float sideB = length( x2, y2, x3, y3 );
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Worshop 2 CT619-Alan Burke
length1 = ( sideA > sideB ? sideA : sideB ); //sides compared
to ensure the length is the longest
return length1;
} // end method getLength
// get width of rectangle
public float getWidth() //getting the width of the rectangle
{
float width1;
float sideA = length( x1, y1, x2, y2 );
float sideB = length( x2, y2, x3, y3 );
width1 = ( sideA < sideB ? sideA : sideB ); //ensure the
width is returned
return width1;
} // end method getWidth
//
public float area () // calculate the area
{
float area = ((getLength()) * (getWidth()));
return area;
}
public float perimeter () //calculate the perimeter
{
float perimeter; //perimeter variable
perimeter = (2* (getLength())) + (2 * getWidth());
return perimeter;
/* JOptionPane.showMessageDialog(null, "perimeter of the
rectangle is " + perimeter); */ //* display the perimeter of the rectangle
}
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Worshop 2 CT619-Alan Burke
public String toString () //set values into a string format so they
can be called
{
if (getLength() ==0 || getWidth() ==0 ) //check errors, if length /
width entered are 0 display error message.
{
return ("Incorrect information has been submitted. Please re assess
the values of length and width");
}
else if ( !isRectangle())
{
return ( "This is not a rectangle");
}
else if (isSquare())
{
return ("This is a square");
}
else
{
return String.format( "%s: %f\n%s: %f\n%s: %f\n%s: %f", /*
string format to output the required data */
"Length", getLength(), "Width", getWidth(),
"Perimeter", perimeter(), "Area", area() );
}
}
}
RectangleTest
import javax.swing.JOptionPane;
public class RectangleTest {
public static void main(String[] args) {
Rectangle myR1 = new Rectangle(); //check default rectangle 1
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Worshop 2 CT619-Alan Burke
Rectangle myR2 = new Rectangle ((float) 5, (float) 3.0, (float)
15, (float) 3, (float) 15, (float) 8, (float) 5, (float) 8 ); //check
integer types rectangle 2
Rectangle myR3 = new Rectangle ((float) 8, (float) 3.0, (float)
12, (float) 3, (float) 12, (float) 7, (float) 8, (float) 7 ); //check
square
Rectangle myR4 = new Rectangle ((float) 21, (float) 17, (float)
12, (float) 3, (float) 12, (float) 7, (float) 8, (float) 7 ); //non
rectangle outside the associated values
System.out.println("Information for Rectangle 1 \n" +
myR1.toString());
System.out.println("\nInformation for Rectangle 2 \n" +
myR2.toString());
System.out.println("\nInformation for Rectangle 3 \n" +
myR3.toString());
System.out.println("\nInformation for Rectangle 4 \n"
+myR4.toString());
}
}
References
Deitel, P and Deitel, H. (2011) Java How to Program, London: Pearson Education M.U.A.
https://www.javascan.com/982/java-program-to-calculate-area-and-perimeter-of-rectangle
[accessed 21.3.19]
https://www.geeksforgeeks.org/check-given-four-integers-sides-make-rectangle/ [accessed 22.3.19]
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