Assignment 15
Due Tuesday, June 9 at 11:59pm on Canvas


Important: To receive credit, you must only use concepts and methods taught in class to complete these assignments - or you will receive a 0


Pair Programming Required (or You Will Receive a 0)
  • Both partners fill in, sign, date, and submit the pair programming contract
  • Upload the document(s) along with your assignment code to Canvas.
  • No extra credit if you do not submit the contract along with your code to Canvas
  • Please make sure both your names are on your file (hint: use a comment).
  • If you need help finding a partner, please contact me as soon as possible.



Assignment 15: Ice Cream Truck (10 pts)
  • In this program, you will write a menu program for an ice cream truck.
  • Name your program IceCream.java
  • For this program, you will need to write 3 methods, as follows:

dispayTotal
  • Takes a double parameter for the total food price.
  • Takes another double parameter for the percent tip
  • calls the calculateTax method to add taxes to the price.
  • calls the calculateTip method to add the tip to the price.
  • Displays the price to two decimal places along with the message "With taxes and tip, your total comes to $<price>"
  • returns nothing

calculateTax

  • Takes in a double parameter for the subtotal for the food.
  • Calculates the tax, assuming the tax rate is 9.25% in San Jose
  • adds the tax onto the the total price,
  • returns the update price

calculateTip

  • Takes in a double parameter for the current bill (price of food + tax).
  • Takes in a second double parameter for the percent tip
  • Calculates the tip and adds the tip onto the the total price
  • returns the updated price

Additional Specifications

  1. Each method must also have a full Javadoc comment in the style described in class or you will lose 3 points.
  2. Important: You should call the displayTotal method inside of main, not the other two methods.
  3. The other 2 methods should be called inside of the displayTotal method.
  4. Hint: calculateTip will work very similarly to the calculateTax method
  5. Note: If the user does not select option A, B, or C for the tip, you should automatically assign a tip of 20% (as shown in the second sample output below).
Starter Code:

/**
 * @author FILL IN YOUR NAME HERE
 * @author FILL IN YOUR NAME HERE
 * CIS 36A
 */
import java.util.Scanner;
public class IceCream {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
       
        int numChoc;
        int numVan;
        int numStraw;
       
        final double PRICE_CHOC = 3.50;
        final double PRICE_VAN = 3.25;
        final double PRICE_STRAW = 3.15;
        final double SUBTOTAL, TIP;
       
        String choice;
       
        System.out.println("Jingle Jingle! Place Your Order Here!\n");
        System.out.print("Enter the number of chocolate: ");
        numChoc = input.nextInt();
       
        System.out.print("Enter the number of vanilla: ");
        numVan = input.nextInt();
       
        System.out.print("Enter the number of strawberry: ");
        numStraw = input.nextInt();
       
        //Add more code here!

        System.out.println("Thank you! Please come again!");
    }
   
    //Write your methods AND JAVADOC COMMENTS here
}

Sample Output
  • Your program should work identically to the following:

Jingle Jingle! Place Your Order Here!

Enter the number of chocolate: 4
Enter the number of vanilla: 3
Enter the number of strawberry: 2

Would you like to tip:

A: 10%
B: 15%
C: 20%

Enter your choice: B
You chose 15%

With taxes and tip, your total comes to $37.75

Thank you! Please come again!


  • Alternately:

Jingle Jingle! Place Your Order Here!

Enter the number of chocolate: 1
Enter the number of vanilla: 0
Enter the number of strawberry: 5

Would you like to tip:

A: 10%
B: 15%
C: 20%

Enter your choice: Z
You chose 20%

With taxes and tip, your total comes to $25.24

Thank you! Please come again!


  • When your program works as shown above, submit it to Canvas.