Part 1: Abstract Classes 1. Copy the source files of Circle, Rectangle and GeometricObject classes (located in LabFiles folder) and paste them in the default package (You may need to fix any problems related to package declaration). 2. Open Circle, Rectangle and GeometricObject classes using NetBeans editor and go through the classes’ implementation. 3. In the GeometricObject class add two methods called respectively getArea() and getPerimeter(). Discuss: 1. Is the area formula of a circle similar to area formula of a rectangle? Since: GeometricObject is the superclass of Circle and Rectangle, and getArea() method is a common method in both Circle and Rectangle classes. Then: 2. Should you define the getArea() method in the superclass GeometricObject? Or in the subclasses Circle and Rectangle? 3. If yes, Should the getArea() method be declared as abstract method in the superclass GeometricObject? Or as instant method? 4. Is declaring getArea() as abstract, would solve the problem of having two different area formulas for Circle and Rectangle? 5. If getArea() is declared as abstract in GeometricObject, should GeometricObject class be declared as abstract class? Now apply the same discussion to getPerimeter() method. 4. Modify the class GeometricObject to be abstract class as well as the methods getArea() and getPerimeter(). Apply the required changes in the class’s header and methods’ header. See the UML class diagrams in next page. GremetrieObject-color: String-filled: booleandateCreated: java.util.DateGeonetricobjectOGeonetricobject(celor: string,filled: boolean)*getcolor(): Stringsetcolor(coler: String): voidisFilled0: booleansetrilled(filled: boolean): votdgetbateCreatedO: java.util.DatetostringO: stringgetAreaO: doublepeterineter): doubleCedeRectangle-radius: doublewidth: double-height: double+Circle+Circlecradius: double)Circle(radius: double, color: string.filled: boolean)*getkadius0: double+setkadius(radius: double): void+Rectangle)+Rectangle(width: double, hefght: double)+Rectangle(width: double, height: double,color: string, filled: boolean)getwidthO: doublegetDiametero: double+setwidth(width: double): voidgetHeight ): double+setheight(height: double): voidFigure 13.1, Liang, Introduction to sova Programming, Tenth Edition, 2015, Pearson Educotion5. In both Circle and Rectangle classes, override the two methods getArea() andgetPerimeter().6. In both Circle and Rectangle classes modify the toString() method to include the areaand perimeter values.7. Create a Test class. Then complete the following tasks:a. In the main method, create an Arraylist of type Geometricobject.b. Add to it the following objects:• Two Circle objects: circlel and circle2.• Two Rectangle objects: rectanglel and rectangle2.c. Print out the ArrayList's elements (use for-each loop). 8. Run the test class.Part 2: Interfaces1. Modify the class Rectangle to implement the Comparable interface, as shown in thefollowing UML class diagrams. Apply the required changes in the class's header.For more details about the Comparable interface see textbook section 13.6interface-java.lang ComparabeckectangleGeometricobject+compareTo(o: Rectangle): intRectangleModified from Figure 13.5, Liong, Introduction to Java Progromming, Tenth Edition, 2015, Pearson Education2. Then, in the Rectangle class override the method compareTo(), so if this object's area isgreater than the specified (given through the parameter) object's area return 1, if it is lessthan return -1, and 0 otherwise.3. Create a test class named Test2. Then complete the following tasks:a. Create an Arraylist and add to it 4 Rectangle objects with different width and heightvalues.b. Print out the elements of the ArrayList.c. Sort the elements of the ArrayList using the static method sort of the classjava.long.Collections. This would be possible only, if you implemented the methodcompareTo() correctly in the Rectangle class.d. After sorting the elements of the ArrayList, print the elements again.4. Run the Test class.

(1) Formula of circle and rectangle are different. (a) Area of Circle: PI*radius*radius (b) Area…

Answered: Part 1: Abstract Classes 1. Copy the…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

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Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

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Question

Part 1: Abstract Classes
1. Copy the source files of Circle, Rectangle and GeometricObject classes (located in
LabFiles folder) and paste them in the default package (You may need to fix any
problems related to package declaration).
2. Open Circle, Rectangle and GeometricObject classes using NetBeans editor and go
through the classes’ implementation.
3. In the GeometricObject class add two methods called respectively getArea() and
getPerimeter().
Discuss:
1. Is the area formula of a circle similar to area formula of a rectangle?
Since:
GeometricObject is the superclass of Circle and Rectangle, and getArea() method is a
common method in both Circle and Rectangle classes.
Then:
2. Should you define the getArea() method in the superclass GeometricObject? Or in
the subclasses Circle and Rectangle?
3. If yes, Should the getArea() method be declared as abstract method in the
superclass GeometricObject? Or as instant method?
4. Is declaring getArea() as abstract, would solve the problem of having two different
area formulas for Circle and Rectangle?
5. If getArea() is declared as abstract in GeometricObject, should GeometricObject
class be declared as abstract class?
Now apply the same discussion to getPerimeter() method.

4. Modify the class GeometricObject to be abstract class as well as the methods getArea()
and getPerimeter(). Apply the required changes in the class’s header and methods’
header. See the UML class diagrams in next page.