Question

Problem1: In this problem we will ask the use to enter a value greater than 1,000 and less than 1,000,000 without a comma and the program will add the comma.

• Create a class named Problem1
  • Create an instance variable named value.
  • Create a constructor that accepts an argument as a parameter variable named v and uses it to initialize the instance variable.
  • Create a method named addComma. It will return a String and will not have an argument.
  • The method should implement the following algorithm:
    • Create a String variable named commaNumber;
    • Create an integer variable named thousands.
    • Create an integer variable named hundreds.
    • Assign to thousands the result of dividing value by one thousand.
    • Assign to hundreds the result of using the modulus operator to find the remainder of dividing value by one thousand.
    • Assign to commaNumber thousands + a comma + hundreds
    • Return commaNumber.
  • Create a tester class named Problem1Tester
    • Import Scanner
    • Create a Scanner object
    • Prompt for a number between 1,000 and 1,000,000 (exclusive) without the comma.
    • Get the number from the user and store it in a variable.
    • Create a Problem1 object initialized to the number obtained from the user
    • Call addComma and print the result (this can be done directly in the print statement or you can create a new variable and print it)

Answer 1

import java.util.*;
import java.io.*;
import java.math.*;
class Problem1
{
  
   int value;
  
   public Problem1(int v)
   {
       value = v;
   }
   String addComma()
   {
       String commaNumber;
       int thousands;
       int hundreds;
       thousands = this.value/1000;
       hundreds = this.value%1000;
       commaNumber = thousands + "," + hundreds;
       return commaNumber;
   }
};
class Problem1Tester
{
   public static void main(String[] args)
   {
       Scanner in = new Scanner(System.in);
       System.out.println("enter a number between 1000 and 1000000\n");
       int inputVariable = Integer.parseInt(in.nextLine());
       Problem1 probObj = new Problem1(inputVariable);
       System.out.println("output: " + probObj.addComma());
   }
}