Write the main method that will test the following methods: In java please Write

Question

Write the main method that will test the following methods: In java please

Write the method to convert Celsius to Fahrenheit.

Write the method to convert Fahrenheit to Celsius

Write a method operator(a,b,c) which will receive 2 integers and one of the 5 operators (*,/,+ -, %) as a character and perform the operation and return the integer value . Example operator(2,3,’*’) will return a 6. (assume no division by zero!))

Write the overloaded method operator(a,b,c) which will receive 2 doubles and one of the 4 operators (*,/,+ -) as a character and perform the operation and return the integer value . Example operator(2.1,3,’*’) will return a 63. (assume no division by zero!))

Write the method sumOfDigits(a) which will receive and integer and return the sum of their digits. (This was a lab!!) Example sumOfDigits(941) return 15.

Explanation / Answer

Hi,

Please find the program that has been requested by you.

TemperatureConversion.java:

import java.util.Scanner;

public class TemperatureConversion {

   public static void main(String[] args) {

//takes input from the keyboard

Scanner scanner = new Scanner(System.in);

       // Converting Fahrenheit to Celsius
       System.out.println("Enter temperature in Fahrenheit :");
       float temperatue = scanner.nextFloat();
       float celsius = fahrenheitToCelsius(temperatue);
       System.out.printf("%.02f degree fahrenheit temperature is equal to %.02f degree celsius %n", temperatue,
               celsius);

       // Converting Celsius to Fahrenheit
       System.out.println("Enter temperature in degree celsius :");
       temperatue = scanner.nextFloat();
       float fahrenheit = celsiusToFahrenheit(temperatue);
       System.out.printf("%.02f degree celsius is equal to %.02f degree fahrenheit %n", temperatue, fahrenheit);
   }

   public static float celsiusToFahrenheit(float celsius) {
       float fahrenheit = 9 * (celsius / 5) + 32;
       return fahrenheit;
   }

   public static float fahrenheitToCelsius(float fahrenheit) {
       float celsius = (fahrenheit - 32) * 5 / 9;
       return celsius;

   }

}

Calculation.java:

public class Calculation {

   public static void main(String[] args) {
       Calculation methodOperator = new Calculation();
       int resultInt= methodOperator.twoArgumentIntegerOperation(2, 3, '*');
       System.out.println("Two Argument Integer Operation Result:"+resultInt);
      
       int resultDouble= (int) methodOperator.twoArgumentDoubleOperation(2.1, 3, '*');
       System.out.println("Two Argument Double Operation Result:"+resultDouble);
   }

   public int twoArgumentIntegerOperation(int a, int b, char operator) {
       int result = 0;

       switch (operator) {
       case '*':
           result = a * b;
           break;
       case '/':
           result = a / b;
           break;
       case '+':
           result = a + b;
           break;
       case '-':
           result = a - b;
           break;
       case '%':
           result = a % b;
           break;

       default:
           System.out.println("Invaild Operator:" + operator);
           break;
       }

       return result;
   }
//Overloaded method

   public double twoArgumentDoubleOperation(double a, double b, char operator) {
       double result = 0;

       switch (operator) {
       case '*':
           result = a * b;
           break;
       case '/':
           result = a / b;
           break;
       case '+':
           result = a + b;
           break;
       case '-':
           result = a - b;
           break;

       default:
           System.out.println("Invaild Operator:" + operator);
           break;
       }

       return result;
   }

}

SumOfDigits.java:

public class SumOfDigits {

   public static void main(String[] args) {
       SumOfDigits sumOfDigits = new SumOfDigits();
       int result = sumOfDigits.sumOfDigits(941);
       System.out.println("Sum of given number:"+result);

   }

   public int sumOfDigits(int digit) {
       int r = 0;
       int sum = 0;

while (digit > 0) {

           r = digit % 10;
           sum = sum + r;
           digit = digit / 10;
       }
       return sum;
   }

}

Hope this was useful.

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