Language is Java

Write a class named Octagon that extends GeometricObject and implements the java.lang. Comparable interfaces, and overrides Object.toString() :String. Assume that all eight sides of the octagon are of equal length. The area A of a regular octagon of side length a is given by A = 2*cot(pi/8)*a2. When implementing the toString() include the side value and area as part of the return value. When implementing Comparable use the value of the area in the comparison process. Write a test program that reads in set of octagon side values from a file (data.txt), creates an Octagon using the side, and adds them to list: ArrayList. Print the unsorted list, sort the list using java.util.Collections.sort(list), then print the sorted list(format your output). Write your output to a file. Provide exception handling for your files as well as for the input. If an invalid input is encountered, report it and then continue reading in the next value. Echo your input to standard output. Note, the sample file data.txt is comma delimited.

Files to upload

: Octagon.java, Test.java, report.txt

data.txt

: 5,0,7.a,3.2,9.7,2.4,3,2

//Algorithm for test program

main:

print Name, Lab Number, and Date

open data.txt as input, report.txt as output

while not eof:

read side

create an octagon using side

add theoctagon to list

print(list) //side, area, and perimeter for each Octagon

sort(list)

print(list) //side, area, and perimeter for each Octagon

close files

The code for GeometricObject is provided here:

public abstract class GeometricObject {

private String color = "white";

private boolean filled;

private java.util.Date dateCreated;

/** Construct a default geometric object */

protected GeometricObject() {

dateCreated = new java.util.Date();

}

/** Construct a geometric object with color and filled value */

protected GeometricObject(String color, boolean filled) {

dateCreated = new java.util.Date();

this.color = color;

this.filled = filled;

}

/** Return color */

public String getColor() {

return color;

}

/** Set a new color */

public void setColor(String color) {

this.color = color;

}

/** Return filled. Since filled is boolean,

* the get method is named isFilled */

public boolean isFilled() {

return filled;

}

/** Set a new filled */

public void setFilled(boolean filled) {

this.filled = filled;

}

/** Get dateCreated */

public java.util.Date getDateCreated() {

return dateCreated;

}

/** Return a string representation of this object */

public String toString() {

return "created on " + dateCreated + " color: " + color +

" and filled: " + filled;

}

/** Abstract method getArea */

public abstract double getArea();

/** Abstract method getPerimeter */

public abstract double getPerimeter();

}