L02 - Soda Can Lab

In this exercise, we're going to implement a class SodaCan. This class has a constructor that accepts the height and radius of the soda can as parameters. We'll supply the methods getVolume and getSurfaceArea. We'll also write a SodaCanTest class to test our SodaCan class.

1. Use a calculator to generate some test cases. We'll use these to check the program's results:

   Case 1: r = 4   h = 10  Area = _____________ Volume = ______________ 
   Case 2: r = 3.5 h = 7.2 Area = _____________ Volume = ______________
   

2. Enter the program below that contains a skeleton of the SodaCan class. You must supply the code that fills in the blanks.

   /**
    Constructor and methods for a soda can object 
    @author __________
    @version __________
    */
    public class SodaCan { 
      __________ double r; //soda can radius 
      __________ double h; //soda can height 
      public SodaCan(double _____, double _____) { 
        r = _____; 
        h = _____; 
      } 
      public _______ findSurfaceArea() { 
        return _____; //compute the surface area A=2πrh+2πr^2 
      }
   
      public double findVolume(){
         return _____; //compute the volume V=πr^2h 
      } 
    }
   

3. Enter the program below that contains a skeleton of the SodaCanTest class. You must supply the code that fills in the blanks.

   import java.util.Scanner;
   /** 
    _______________________________ 
    @author __________ 
    @version __________
    */
    public class ___________ { 
      public static void main(String[] args) { 
        Scanner myScanner = new Scanner(System.in);
   
        System.out.print("Enter the radius: ");
        String answer = myScanner.nextLine();
        double radius = ______; //convert using the parseDouble method
   
        System.out.print("Enter the height: "); 
        answer = myScanner.nextLine(); 
        double height = ______; //convert using the parseDouble method
   
        //instantiate a soda can object using the radius and height above 
        //display the surface area to three decimal digits using printf 
        //display the volume to three decimal digits using printf 
      } 
    } 
   

4. Use your test cases to check your code.