Question

Write a program which takes 3 inputs values as dimensions of a cuboid. Do the following-

1. Verify it forms a cuboid (non zero, non negative and non-integer inputs).

2. Show the longest and shortest edges.

3. Calculate the surface area of the square made by the two short edges.

4. Calculate the volume of the cuboid.

Refer the following to learn about the cuboid (generally this is called the domain knowledge)

https://www.math-only-math.com/cuboid.html

Volume and Surface Area of Cuboids and Cubes ( GMAT / GRE / CAT / Bank PO / SSC CGL)

Provide value adding comments in the code wherever necessary.

Write test cases covering as many scenarios as possible.

Maintain a tabular format with columns - Test#, Scenario, test steps, expected result, Actual result.

java code required

JAVA CODE

Answer 1

JAVA PROGRAM

///////////////////////Cuboid.java////////////////////////////////

import java.util.Arrays;
import java.util.Scanner;

public class Cuboid {
  
   private int length,breadth,height;
  
   public Cuboid(int length,int breadth, int height){
       this.length = length;
       this.breadth = breadth;
       this.height = height;
       System.out.println("Cuboid is Created!");
   }
   public static void main(String[] args){
       Scanner sc = new Scanner(System.in);
       int length=0,breadth=0,height=0;
       boolean isValid = true;
       try{
           System.out.println("Enter length of cuboid:");
           length = sc.nextInt();
           if(length <=0){
               System.out.println("Invalid Length provided!");
               isValid = false;
           }
       }catch(Exception e){
           System.out.println("Invalid length provided");
           isValid = false;
       }
      
       if(isValid){
           try{
               System.out.println("Enter breadth of cuboid:");
               breadth = sc.nextInt();
               if(breadth <=0){
                   System.out.println("Invalid breadth provided!");
                   isValid = false;
               }
           }catch(Exception e){
               System.out.println("Invalid breadth provided");
               isValid = false;
           }
       }
      
       if(isValid){
           try{
               System.out.println("Enter height of cuboid:");
               height = sc.nextInt();
               if(height <=0){
                   System.out.println("Invalid height provided!");
                   isValid = false;
               }
           }catch(Exception e){
               System.out.println("Invalid height provided");
               isValid = false;
           }
       }
      
       if(!isValid){
           return;
       }
       Cuboid c = new Cuboid(length, breadth, height);
       int[] edges = {length,breadth,height};
       Arrays.sort(edges);
       System.out.println("Shortest edge is: "+edges[0]);
       System.out.println("Longest edge is: "+edges[2]);
      
       //calculate surface area formed by 2 shortest edge(2 of them are the shortest edge only)
       int surfaceAreaSquare = c.calculateSurfaceArea(edges[0],edges[0]);
       System.out.println("Surface area of the square formed by the shortest edges("+edges[0]+ "unit): "
       +surfaceAreaSquare+" square unit");
      
       //calculate surface area formed by 2 short edges (shortest, next shortest)
       int surfaceArea = c.calculateSurfaceArea(edges[0],edges[1]);
       System.out.println("Surface area formed by 2 short edges("+edges[0]+"unit and "+edges[1]+"unit ) : "
       +surfaceArea+" square unit");
      
       int volume = c.calculateVolume();
       System.out.println("Volume of the cuboid is: "+ volume + " cubic unit");
   }
  
   /**
   * returns volume of the cuboid
   * @return
   */
   private int calculateVolume(){
       return length*breadth*height;
   }
  
   /**
   * calculate surface area
   * @param edge1
   * @param edge2
   * @return
   */
   private int calculateSurfaceArea(int edge1,int edge2){
       return edge1*edge2;
   }
  
  

}

==============================================

OUTPUT

==============================================

Run1

Enter length of cuboid:
11
Enter breadth of cuboid:
15
Enter height of cuboid:
19
Cuboid is Created!
Shortest edge is: 11
Longest edge is: 19
Surface area of the square formed by the shortest edges(11unit): 121 square unit
Surface area formed by 2 short edges(11unit and 15unit ) : 165 square unit
Volume of the cuboid is: 3135 cubic unit

Run2

Enter length of cuboid:
15
Enter breadth of cuboid:
27
Enter height of cuboid:
-45
Invalid height provided!

Run3
Enter length of cuboid:
12
Enter breadth of cuboid:
klh
Invalid breadth provided


================================================

ASSUMPTION

================================================

If length,breadth and height of the cuboid are different, then none of the surfaces for the cuboid wil be square.

Hence for the point#3 , two versions are given while testing.

#1. surfacearea of the square is calculated by considering only the smallest edge

#2. surface area is calculated for the rectangle formed by by 2 shortest edges.