Question

JAVA CODE BEGINNERS, I already have the demo code included

Write a Bottle class. The Bottle will have one private int that represents the countable value in the Bottle. Please use one of these names: cookies, marbles, M&Ms, pennies, nickels, dimes or pebbles. The class has these 14 methods: read()(please use a while loop to prompt for an acceptable value), set(int), set(Bottle), get(), (returns the value stored in Bottle), add(Bottle), subtract(Bottle), multiply(Bottle), divide(Bottle), add(int), subtract(int), multiply(int), divide(int), equals(Bottle), and toString()(toString() method will be given in class). All add, subtract, multiply and divide methods return a Bottle. This means the demo code b2 = b3.add(b1) brings into the add method a Bottle b1 which is added to b3. Bottle b3 is the this Bottle. The returned bottle is a new bottle containing the sum of b1 and b3. The value of b3 (the this bottle) is not changed. Your Bottle class must guarantee bottles always have a positive value and never exceed a maximum number chosen by you. These numbers are declared as constants of the class. Use the names MIN and MAX. The read() method should guarantee a value that does not violate the MIN or MAX value. Use a while loop in the read method to prompt for a new value if necessary. Each method with a parameter must be examined to determine if the upper or lower bound could be violated. In the case of the add method with a Bottle parameter your code must test for violating the maximum value. It is impossible for this add method to violate the minimum value of zero. The method subtract with a Bottle parameter must test for a violation of the minimum zero value but should not test for exceeding the maximum value. In the case of a parameter that is an integer, all methods must be examined to guarantee a value that does not violate the MIN or MAX values. Consider each method carefully and test only the conditions that could be violated.

import java.util.Scanner;
// test driver for the Bottle class
                public class BottleDemo3
{
        public static void main(String[] args)
        {
                Scanner scan = new Scanner(System.in);
                int x;
                Bottle bottle1 = new Bottle();
                Bottle bottle2 = new Bottle();
                Bottle bottle3 = new Bottle();
                Bottle bottle4 = new Bottle();
                Bottle bottle5 = new Bottle();
                System.out.println("please enter a number for bottle1:");
                bottle1.read();
                System.out.println("Bottle1 is this value " + bottle1 + ".");
                System.out.println("Please enter a number for bottle2:");
                bottle2.read();
                bottle3 = bottle2.add(bottle1);
                System.out.println("The sum of bottle2 and bottle1 is: " + bottle3 + ".");
                bottle4 = bottle3.divide(2);
                System.out.println("The 2 bottle average is: " + bottle4 + ".");
                System.out.print("Subtracting bottle1 from bottle2 is: " );
                bottle3 = bottle2.subtract(bottle1);
                System.out.println( bottle3);
                bottle3 = bottle2.divide(bottle1);
                System.out.println("Dividing bottle2 with bottle1 is: " + bottle3 + ".");
                if (bottle1.equals(bottle2))
                {
                        System.out.println("Bottle1 and bottle2 are equal.");
                }
                else
                {
                        System.out.println("Bottle1 and bottle2 are not equal.");
                }
                System.out.println("Bottle4 is now given the value of 10 with the set() method.");
                bottle4.set(10);
                System.out.println("The value of bottle4 is " + bottle4 + ".");
                System.out.println("Bottle4 is now multipled with bottle1.  The value is placed in " +
                                "bottle5.");
                bottle5 = bottle1.multiply(bottle4);
                System.out.println("The value of bottle5 is " + bottle5 + ".");
                System.out.println("Enter an integer to add to the value bottle1 has.");
                System.out.println("The sum will be put in bottle3.");
                x = scan.nextInt();
                bottle3 = bottle1.add(x);
                System.out.println("Adding your number " + x +
                        " to bottle1 gives a new Bottle with " + bottle3 + " in it.");
                System.out.print("Adding the number " + bottle2 + " which is the number" +
                                " in bottle2 to the\nnumber in ");
                bottle2 = bottle1.add(bottle2);
                System.out.println("bottle1 which is " + bottle1 +" gives " + bottle2 + ".");
                bottle2.set(bottle2.get());
        }
}

Answer 1

If you have any program with code feel free to comment

Program

package funWithBottle;

import java.util.Scanner;

/*since no instruction was given on what to do when the violation occurs
* other than read() I have simply put a message to show the violation*/

public class Bottle {
  
   private int pebbles=0;
   //hardcoded min and max
   private final int max = 15;
   private final int min = 1;

   public void read() {
       Scanner sc= new Scanner(System.in);
       pebbles = sc.nextInt();sc.nextLine();
       while(pebbles< min || pebbles > max) {//re entering the values when violation occures
           System.out.print("Invalid Input! try again: ");
           pebbles = sc.nextInt();sc.nextLine();
       }
   }
   //setters
   public void set(int val) {
       if(val< min || val > max) {
           System.out.print("Violation of value in set(int)\n");
       }
       pebbles = val;
   }
  
   public void set(Bottle b) {
       if(b.pebbles< min || b.pebbles > max) {
           System.out.print("Violation of value set(Bottle)\n");
       }
       pebbles = b.pebbles;
   }
   //getter
   public int get() {
       return pebbles;
   }
   //adding bottles
   public Bottle add(Bottle b) {
       Bottle ans = new Bottle();
       int sum = this.pebbles + b.pebbles;
       ans.set(sum);
       if(ans.pebbles< min || ans.pebbles > max) {
           System.out.print("Violation of value in add(bottle)\n");
       }
       return ans;
   }
   public Bottle add(int val) {
       Bottle ans = new Bottle();
       int sum = this.pebbles + val;
       ans.set(sum);
       if(ans.pebbles< min || ans.pebbles > max) {
           System.out.print("Violation of value in add(int)\n");
       }
       return ans;
   }
   //subtracting bottles
   public Bottle subtract(Bottle b) {
       Bottle ans = new Bottle();
       int sum = this.pebbles - b.pebbles;
       ans.set(sum);
       if(ans.pebbles< min || ans.pebbles > max) {
           System.out.print("Violation of value in subtract(bottle)\n");
       }
       return ans;
   }
   public Bottle subtract(int val) {
       Bottle ans = new Bottle();
       int sum = this.pebbles - val;
       ans.set(sum);
       if(ans.pebbles< min || ans.pebbles > max) {
           System.out.print("Violation of value in subtract(int)\n");
       }
       return ans;
   }
   //multiplying bottles
   public Bottle multiply(Bottle b) {
       Bottle ans = new Bottle();
       int sum = this.pebbles * b.pebbles;
       ans.set(sum);
       if(ans.pebbles< min || ans.pebbles > max) {
           System.out.print("Violation of value in multiply(bottle)\n");
       }
       return ans;
   }
   public Bottle multiply(int val) {
       Bottle ans = new Bottle();
       int sum = this.pebbles * val;
       ans.set(sum);
       if(ans.pebbles< min || ans.pebbles > max) {
           System.out.print("Violation of value in multiply(int)\n");
       }
       return ans;
   }
   //dividing bottles
   public Bottle divide(Bottle b) {
       Bottle ans = new Bottle();
       int sum = this.pebbles / b.pebbles;
       ans.set(sum);
       if(ans.pebbles< min || ans.pebbles > max) {
           System.out.print("Violation of value in divide(bottle)\n");
       }
       return ans;
   }
   public Bottle divide(int val) {
       Bottle ans = new Bottle();
       int sum = this.pebbles / val;
       ans.set(sum);
       if(ans.pebbles< min || ans.pebbles > max) {
           System.out.print("Violation of value in divide(int)\n");
       }
       return ans;
   }
   //comparing bottles
   public boolean equals(Bottle obj) {
       if (this == obj)
           return true;
       if (obj == null)
           return false;
       if (getClass() != obj.getClass())
           return false;
       if (pebbles != obj.pebbles)
           return false;
       return true;
   }

   @Override//string representation of the class
   public String toString() {
       return pebbles+"";
   }
  
}

Output