Create an application class called Calculator wit h the following members: Metho

Question

Create an application class called Calculator wit h the following members: Methods: static int addition (int firstNumber, int secondNumber) Returns firstNumber secondNumber static int subtraction (int firstNumber, int secondNumber) Returns firstNumber - secondNumber . static int multiplication (int firstNumber, int secondNumber) Returns firstNumber* secondNumber static int quotient (int firstNumber, int secondNumber) Returns firstNumber / secondNumber . static void main(String[l args) Asks for two integer numbers and an operator (+, - *, /). Then shows the result according to the input numbers and the operator. Use exception handling to process any ArithmeticExceptions and InputMistMachExceptions that arise.

Explanation / Answer

program:-

import java.util.Scanner;
import java.util.InputMismatchException;

public class Calculator
{
    public static void main(String[] args) throws InputMismatchException, ArithmeticException
    {
        Scanner s = new Scanner(System.in); //scanner for read input

        int ans=0,firstNumber=0,secondNumber=0;
        char choice='';
        try
        {
            System.out.println("Please enter first integer number: ");

            firstNumber = s.nextInt(); //read first number
            System.out.println("Please enter second integer number: ");
            secondNumber = s.nextInt(); //read second number
            System.out.println("Please enter an operator: ");
            choice = s.next().charAt(0);    //read first char i.e., +,-,*,/

            switch (choice) //operation according to our choice
            {
                case '+':
                    ans= addition(firstNumber,secondNumber);
                    break;
                case '-':
                    ans=subtraction(firstNumber, secondNumber);
                    break;
                case '/':
                    ans=division(firstNumber, secondNumber);
                    break;
                case '*':
                    ans=multiplication(firstNumber, secondNumber);
                    break;
                default:
                    break;
            }
            if(ans!=9999)   //print answer if answer not equal to infinity i.e., 9999
            System.out.println("Result: "+firstNumber+" "+choice+" "+secondNumber+" = "+ans);
        }
        catch(InputMismatchException e) //exception for InputMismatchException for first number and second number
        {
            System.out.println(e);
            System.out.println("You must enter integers...");
        }
    }
    //implementation of individual methods with exception handling and return results
    static int addition(int firstNumber, int secondNumber)
    {
        int ans=0;
        try
        {
            ans = firstNumber+secondNumber;
        }
        catch(ArithmeticException e)
        {
            System.out.println(e);
        }
        return ans;
    }
  
    static int subtraction(int firstNumber, int secondNumber)
    {
        int ans=0;
        try
        {
            ans = firstNumber-secondNumber;
        }
        catch(ArithmeticException e)
        {
            System.out.println(e);
        }
        return ans;
    }

    static int division(int firstNumber, int secondNumber)
    {
        int ans=0;
        try
        {
            ans = firstNumber/secondNumber;
        }
        catch(ArithmeticException e)
        {
            System.out.println(e);
            return 9999;
        }
        return ans;
    }

    static int multiplication(int firstNumber, int secondNumber)
    {
        int ans=0;
        try
        {
            ans=firstNumber*secondNumber;
        }
        catch(ArithmeticException e)
        {
            System.out.println(e);
        }
        return ans;
    }
}

output:--
1
run:
Please enter first integer number:
6
Please enter second integer number:
0
Please enter an operator:
/
java.lang.ArithmeticException: / by zero
BUILD SUCCESSFUL (total time: 7 seconds)

2
run:
Please enter first integer number:
6
Please enter second integer number:
3
Please enter an operator:
+
Result: 6 + 3 = 9
BUILD SUCCESSFUL (total time: 4 seconds)

3
run:
Please enter first integer number:
7
Please enter second integer number:
8
Please enter an operator:
*
Result: 7 * 8 = 56
BUILD SUCCESSFUL (total time: 5 seconds)

4
run:
Please enter first integer number:
6
Please enter second integer number:
?
java.util.InputMismatchException
You must enter integers...
BUILD SUCCESSFUL (total time: 6 seconds)

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