Program To Implement Shapes and Colors in Java Assignment Solution.

Instructions

Objective

Write a java assignment program to implement shapes and colors.

Requirements and Specifications

Program to implement shapes and colors in java

Source Code

CIRCLE

public class Circle extends Shape {
 private double radius;
 // Default constructor
 public Circle() {
 super(); // calling the super-class default constructor initializes the color to 'green'
 radius = 1.0;
 }
 // Overloaded constructor
 public Circle(double rad, String col) {
 super(col); // call super-class constructor with the given color
 setRadius(rad);
 }
 // getters and setters
 public double getRadius() {return radius;}
 public void setRadius(double new_radius) {
 if(new_radius < 0) // if the given radius is negative, set it to 1.0
 {
 new_radius = 1.0;
 }
 radius = new_radius;
 }
 // methods
 public double getArea() {
 return Math.PI*Math.pow(getRadius(), 2);
 }
 @Override
 public String toString() {
 return String.format("A Circle with radius=%.2f, which is a subclass of %s", getRadius(), super.toString());
 }
}

DRIVER

public class Driver {
 public static void main(String[] args) throws Exception {
 // Create a red Circle with radius -1
 Circle circle = new Circle(-1, "red");
 // If we print it, it should display a radius of 1.0 not -1
 System.out.println("This circle is " + circle.getColor()); // print color
 System.out.println(circle.toString());
 System.out.println(String.format("Area: %.2f", circle.getArea()));
 System.out.println("");
 // Create a yellow circle of radius 2
 circle = new Circle(2.0, "yellow");
 System.out.println("This circle is " + circle.getColor()); // print color
 System.out.println(circle.toString());
 System.out.println(String.format("Area: %.2f", circle.getArea()));
 System.out.println("");
 // Rectangles
 // Create a rectangle with width = 5 and length = 2
 Rectangle rect = new Rectangle(5.0,2.0,"black");
 System.out.println(rect.toString());
 System.out.println(String.format("Area: %.2f", rect.getArea()));
 System.out.println("");
 // Create a rectangle with negative values. Both its width and length should be setted to 1
 rect = new Rectangle(-100, -500, "white");
 System.out.println(rect.toString());
 System.out.println("");
 }
}

RECTANGLE

import java.lang.ref.WeakReference;
import javax.sql.rowset.WebRowSet;
public class Rectangle extends Shape {
 private double width;
 private double length;
 // No-arg constrcutor
 public Rectangle() {
 super();
 width = 1.0;
 length = 1.0;
 }
 // Overloaded constructor
 public Rectangle(double w, double l, String col) {
 super(col);
 setWidth(w);
 setLength(l);
 }
 // getters and setters
 public double getWidth() {
 return width;
 }
 public void setWidth(double w) {
 if(w < 0.0) {
 w = 1.0;
 }
 width = w;
 }
 public double getLength() {
 return length;
 }
 public void setLength(double l) {
 if(l < 0.0) {
 l = 1.0;
 }
 length = l;
 }
 // methods
 public double getArea() {return getWidth()*getLength();}
 @Override
 public String toString(){
 return String.format("A Rectangle with width=%.2f and length=%.2f, which is a subclass of %s", getWidth(), getLength(), super.toString());
 }
}

SHAPE

public class Shape
{
 protected String color;
 // default constructor
 public Shape() {
 color = "green";
 }
 // Overloaded constructor
 public Shape(String col) {
 color = col;
 }
 // getter and setter
 public void setColor(String new_color) { color = new_color;}
 public String getColor() {return color;}
 // toString
 @Override
 public String toString() {
 return "A Shape with color " + getColor();
 }
}

Create A Program to Implement Shapes and Colors in Java Assignment Solution.

Instructions

Requirements and Specifications