Circle.java

/*
 * Name: Janan Patel
 * Date: 10/25/2021
 * Course Number: 220
 * Course Name: Data Structures
 * Problem Number: 6
 * Email: [email protected]
 * Short Description of the Problem: Creating classes to get areas and perimeters!
 */

package shapes;

public class Circle extends Shape {
	private double radius;

	public Circle() {
		this(1, "white", false);
	}

	public Circle(double radius) {
		this(radius, "white", false);
	}

	public Circle(double radius, String color, boolean filled) {
		super(color, filled);
		setRadius(radius);
	}

	/** Return radius */
	public double getRadius() {
		return radius;
	}

	/** Set a new radius */
	public void setRadius(double radius) {
		if (radius < 0)
			throw new InvalidRadiusException(radius);
		this.radius = radius;
	}

	/** Return area */
	public double getArea() {
		return this.radius * this.radius * Math.PI;
	}

	/** Return diameter */
	public double getDiameter() {
		return 2 * this.radius;
	}

	/** Return perimeter */
	public double getPerimeter() {
		return 2 * this.radius * Math.PI;
	}

	public String toString() {
		String retval = "";

		retval += "Circle: Radius = " + this.radius + "\n";
		retval += super.toString();

		return retval;
	}
}

@SuppressWarnings("serial")
class InvalidRadiusException extends RuntimeException {
	private double radius;

	/** Construct an exception */
	public InvalidRadiusException(double radius) {
		super("Invalid radius " + radius);
		this.radius = radius;
	}

	/** Return the radius */
	public double getRadius() {
		return radius;
	}
}

Rectangle.java

/*
 * Name: Janan Patel
 * Date: 10/25/2021
 * Course Number: 220
 * Course Name: Data Structures
 * Problem Number: 6
 * Email: [email protected]
 * Short Description of the Problem: Creating classes to get areas and perimeters!
 */

package shapes;

public class Rectangle extends Shape {
  private double length;
  private double width;

  public Rectangle() {
  }

  public Rectangle(double width, double height) {
    this(width, height, "white", false);
  }

  public Rectangle(double width, double height, String color, boolean filled) {
	super(color, filled);
    this.width = width;
    this.length = height;
  }

  /** Return width */
  public double getWidth() {
    return width;
  }

  /** Set a new width */
  public void setWidth(double width) {
    this.width = width;
  }

  /** Return height */
  public double getLength() {
    return length;
  }

  /** Set a new height */
  public void setHeight(double height) {
    this.length = height;
  }

  /** Return area */
  public double getArea() {
    return this.width * this.length;
  }

  /** Return perimeter */
  public double getPerimeter() {
    return 2 * (width + length);
  }
  
  public String toString() {
	  return "Rectangle: " + this.length + " x " + this.width + "\n" +
             super.toString();
  }
}

Shape.java

/*
 * Name: Janan Patel
 * Date: 10/25/2021
 * Course Number: 220
 * Course Name: Data Structures
 * Problem Number: 6
 * Email: [email protected]
 * Short Description of the Problem: Creating classes to get areas and perimeters!
 */

package shapes;

import java.util.*;

abstract public class Shape {
	private String color;
	private boolean filled;
	private Date dateCreated;

	/** Construct a default geometric object */
	public Shape() {
		this("white", false);
	}

	/**
	 * Construct a geometric object with the specified color and filled value
	 */
	public Shape(String color, boolean filled) {
		this.dateCreated = new 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, its 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 Date getDateCreated() {
		return dateCreated;
	}

	/** Return a string representation of this object */
	public String toString() {
		return "Shape: created on " + dateCreated + "\nColor: " + color
				+ " and Filled: " + filled;
	}
	
	abstract public double getArea();

	abstract public double getPerimeter(); 	
	
}

TestShapes.java

/*
 * Name: Janan Patel
 * Date: 10/25/2021
 * Course Number: 220
 * Course Name: Data Structures
 * Problem Number: 6
 * Email: [email protected]
 * Short Description of the Problem: Creating classes to get areas and perimeters!
 */

package shapes;

import java.util.Scanner;

public class TestShapes {
	private final static String TITLE = "Test Shapes V1.0";
	private final static String CONTINUE_PROMPT = "Do this again? [y/N] ";

	// **********************************************
	// Put as many methods you need here

	private static String getFirstCharacter(String str) {
		str = str.trim().toUpperCase();
		return str.isEmpty() ? "" : str.substring(0, 1);
	}

	// **********************************************

	private static void process(Scanner sc, String args[]) {

		System.out.print("Enter Shape to create [C]ircle, [R]ectangle, [T]riangle : ");
		String strShape = getFirstCharacter(sc.nextLine());
		Shape shape = null;
		switch (strShape) {
		case "C": {
			System.out.print("Enter radius: ");
			double radius = sc.nextDouble();
			System.out.print("Enter color: ");
			String color = sc.next();
			System.out.print("Enter is filled: ");
			boolean isFilled = sc.nextBoolean();
			sc.nextLine();
			shape = new Circle(radius, color, isFilled);
			break;
		}
		case "R": {
			System.out.print("Enter length & width: ");
			double length = sc.nextDouble();
			double width = sc.nextDouble();
			System.out.print("Enter color: ");
			String color = sc.next();
			System.out.print("Enter is filled: ");
			boolean isFilled = sc.nextBoolean();
			sc.nextLine();
			shape = new Rectangle(length, width, color, isFilled);
			break;
		}
		case "T": {
			System.out.print("Enter the three sides: ");
			double side1 = sc.nextDouble();
			double side2 = sc.nextDouble();
			double side3 = sc.nextDouble();
			
			System.out.print("Enter color: ");
			String color = sc.next();
			System.out.print("Enter is filled: ");
			boolean isFilled = sc.nextBoolean();
			sc.nextLine();
			shape = new Triangle(side1, side2, side3, color, isFilled);
			break;

		}
		default:
			System.out.println("Bad Shape Specified.");
			break;
		}
		if (shape != null) {
			System.out.println(shape);
			System.out.printf("Perimeter = %.2f\n", shape.getPerimeter());
			System.out.printf("Area = %.2f\n", shape.getArea());
		}
	}

	// **********************************************
	// Do not change the doThisAgain method
	private static boolean doThisAgain(Scanner sc, String prompt) {
		System.out.print(prompt);
		String doOver = sc.nextLine();
		return doOver.trim().equalsIgnoreCase("Y");
	}

	// **********************************************
	// Do not change the main method
	public static void main(String args[]) {
		System.out.println("Welcome to " + TITLE);
		Scanner sc = new Scanner(System.in);
		do {
			process(sc, args);
		} while (doThisAgain(sc, CONTINUE_PROMPT));
		sc.close();
		System.out.println("Thank you for using " + TITLE);
	}

}

/*
 * public static void main(String[] args) { Shape s1 = new Circle(2);
 * System.out.println("A circle " + s1.toString());
 * System.out.println("The color is " + s1.getColor());
 * System.out.println("The area is " + s1.getArea());
 * System.out.println("The perimeter is " + s1.getPerimeter()); Circle circle =
 * (Circle)s1; System.out.println("The radius is " + circle.getRadius());
 * System.out.println("The diameter is " + circle.getDiameter()); Shape s2 = new
 * Rectangle(2, 4); System.out.println("\nA rectangle " + s2);
 * System.out.println("The color is " + s2.getColor());
 * System.out.println("The area is " + s2.getArea());
 * System.out.println("The perimeter is " + s2.getPerimeter()); Rectangle rect =
 * (Rectangle)s2; System.out.println("The length is " + rect.getLength());
 * System.out.println("The diameter is " + rect.getWidth()); //Shape s3 = new
 * Triangle(10, 8, 3); //System.out.println("\nA triangle " + s3);
 * //System.out.println("The color is " + s3.getColor());
 * //System.out.println("The area is " + s3.getArea());
 * //System.out.println("The perimeter is " + s3.getPerimeter()); //Triangle tri
 * = (Triangle)s3; //System.out.println("Side 1 is " + tri.getSide1());
 * //System.out.println("Side 2 is " + tri.getSide2());
 * //System.out.println("Side 3 is " + tri.getSide3()); Shape s4 = null; switch
 * ((int)(3 * Math.random())) { case 0: s4 = new Rectangle(2, 4); break; case 1:
 * s4 = new Circle(5); break; case 2: //s4 = new Triangle(1, 2, 2); break; }
 * System.out.println(s4); if (s4 instanceof Circle) {
 * System.out.println("Diameter " + ((Circle)s4).getDiameter()); } else
 * System.out.println("Not a circle");
 * 
 * }
 */

Triangle.java

/*
 * Name: Janan Patel
 * Date: 10/25/2021
 * Course Number: 220
 * Course Name: Data Structures
 * Problem Number: 6
 * Email: [email protected]
 * Short Description of the Problem: Creating classes to get areas and perimeters!
 */

package shapes;

public class Triangle extends Shape {

	private double side1 = 1.0;
	private double side2 = 1.0;
	private double side3 = 1.0;

	public boolean isValid(double side1, double side2, double side3) {

		return (((side1 + side2 > side3) && (side2 + side3 > side1) && (side1 + side3 > side2))
				&& ((side1 > 0) && (side2 > 0) && (side3 > 0)));
	}

	public Triangle() {
		this(1.0, 1.0, 1.0);
	}

	public Triangle(double side1, double side2, double side3) {

		setSide1(side1);
		setSide2(side2);
		setSide3(side3);

	}

	public Triangle(double side1, double side2, double side3, String color, boolean filled) {
		super(color, filled);

		if (isValid(side1, side2, side3)) {

			setSide1(side1);
			setSide2(side2);
			setSide3(side3);
		}
		
		System.out.print("Invalid Triangle sides: Please try again with valid sides. Here are examples of valid sides: (1,1,1) (5,12,13) etc"
				+ "\nThe program will default the values to 1 for you so you can try again");
	
			

	}

	public double getSide1() {
		return side1;
	}

	public double getSide2() {
		return side2;
	}

	public double getSide3() {
		return side3;
	}

	public void setSide1(double side1) {
		this.side1 = side1;
	}

	public void setSide2(double side2) {
		this.side2 = side2;
	}

	public void setSide3(double side3) {
		this.side3 = side3;
	}

	@Override
	public double getArea() {

		double semiPerimeter = (getSide1() + getSide2() + getSide3()) / 2;
		return Math.sqrt((semiPerimeter)
				* ((semiPerimeter - getSide1()) * (semiPerimeter - getSide2()) * (semiPerimeter - getSide3())));

	}

	@Override
	public double getPerimeter() {

		return (getSide1() + getSide2() + getSide3());
	}

	@Override
	public String toString() {

		return "\nTriangle: Side 1 = " + getSide1() + " Side 2 = " + getSide2() + " Side 3 = " + getSide3() + "\n"
				+ super.toString();

	}

}