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The following diagram shows the abstract class GeometricObject. public abstract class GeometricObject { private String color = "white"; private boolean 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, so, the get method name is isFilled */ public boolean isFilled() { return filled; } /** Set a new filled */ public void setFilled(boolean filled) { this.filled = filled; } /** Return a string representation of this object */ public String toString() { return "\ncolor: " + color + " and filled: " + filled; } /** Abstract method getPerimeter */ public abstract double getPerimeter();}
(a) Design a class named Triangle that extends GeometricObject. The class contains three double data fields named side1, side2, and side3 with default values 1.0 to denote three sides of the triangle. Implement the getPerimeter() that returns the perimeter of this triangle
(b) Re-design the class Triangle that also implements Comparable. The triangles are compared in terms of their perimeters. (c)
Design a new class named Polygon that extends GeometricObject and implements Comparable. The number of sides in polygons varies, you cannot use a certain number of data fields for sides of a polygon. For example a triangle is seen as a polygon with three sides and a rectangle is a polygon of four sides. Please use a List of Double values to denote the length of each side of a polygon. Implement the getPerimeter() that returns the perimeter of this triangle
Create a Java program based on the geometric shapes example described at the beginning of this lesson using Classes Square, Triangle, Rectangle, and Circ leto help describe inheritance and polymorphism.
Create a New Project named InheritanceDemo . 2. Create a new class called Person and cut and paste the Person.java file from Blackboard into the class. Create a new class called Student and cut and paste the Student.java file from Blackboard into the..
Write a program that uses the top five countries' National Wealth to calculate the average of those five countries.
Write a Java program that uses a search tree of strings to sort text lines in alphabetic order. You may choose how you de?ne alphabetic order as long as there is some sense in the de?nition. You may also choose what kind of tree you use.
use inheritance to read, store, and print questions for a test. First, write an abstract class
socket programming modify the translate program and dictionary program. modify the programs to handle multiple user
instance methods: setWidth(double w), setHeight(double h), double getWidth(), double getHeight() and double getArea() * A triangle's area is calculated by width*height*0.5 * all variables are private and methods public.
Add a method addText to the Question superclass and provide a different implementa- tion of ChoiceQuestion that calls addText rather than storing an array list of choices.
Then your program produces 1000 integer ranging from 1to 10000 in the array and then sort them in ascending order and then print the result into data.txt file. (You may list integers separated by space or new line)
Java program simulate a network
project is for designing and developing a college registration program. write a java program to register students for a
Prompt the user for an int between lower and upper boundary.
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