Convert Celsius to Fahrenheit and vice versa

Asked By Jennifer Brown 0 points N/A Posted on - 04/06/2012

Hey,

My brother asked me to help him in his homework. His instructor asked him to create a program that will convert Celsius to Fahrenheit and vice versa using Java.

I don't know the formula and I have no knowledge on how to do this. Can you help me?

Thanks

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Best Answer by Sheldon Ron

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Answered By Sheldon Ron 0 points N/A #101989

Convert Celsius to Fahrenheit and vice versa

//Conversion in Java Celsius to Fahrenheit and Fahrenheit to Celsius

Formulae:

C / 100 = ( F – 32 ) / 180

 

import  java.io.* ;

public class Temperature{

// c / 100 = ( f – 32 ) / 180

    public static void main(String args[]){

        InputStreamReader inputstream = new InputStreamReader ( System.in ) ;

        BufferedReader buffer = new BufferedReader( inputstream ) ;

        try {

            //Celsius to Fahrenheit

             System.out.print(" Enter Celsius value for conversion to Fahrenheit: ");

             String txt = buffer.readLine();

             double C=Integer.parseInt( txt );

             double F=( C * 180 / 100 ) + 32;

             System.out.print("Converted Fahrenheit Value: "+F);

             //Farenheit to Celsius

             System.out.print(" n Enter  Fahrenheit value for Conversion to Celsius:  ");

             txt = buffer.readLine();

             F=Integer.parseInt(txt);

             C=( ( F – 32 ) / 180 ) * 100;

             System.out.print("Converted Celsius Value:  " + C);

        }

        catch (IOException  err) {

             System.out.println(" Error reading line from Input board ");

        }

 

    }

An explanation,

The equation that relates Celsius, Fahrenheit & Kelvin is

c/100=(f-32)/180=(k-273)/100.

here we need only the first part.

c/100=(f-32)/180

This equates in Celsius to c=(f-32)*100/180

and in Fahrenheit to f=(c*180/100) + 32

Thus the system accepts a Celsius value at first and then tries to change into Fahrenheit as shown ion the above formulas and prints the output in a double format, means in fraction.

Next it accepts a Fahrenheit value and tries to solve it using the above formulas and converts to Celsius.

All you get i two values of conversion.

For the input, Input Stream Reader is called and that it may throw the IO exception if the input is not properly read.

Thanks.

 

 

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• Posted on - 04/08/2012
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Answered By Head Jonathon 0 points N/A #101990

Convert Celsius to Fahrenheit and vice versa

Hi Jennifer,

Please see below a simple java program that will convert Celsius to Fahrenheit and Fahrenheit to Celsius. You need to input a temperature and the program will give both conversions.

This demonstrates input and output in Java using Scanner Class.

import java.util.Scanner;

 class TempConverter {

          public static void main(String[] args) {

                   int temp,far,cel;

                   System.out.print("What is the temperature you'd like to convert?  ");

                   Scanner myScanner = new Scanner(System.in);

                   temp = myScanner.nextInt();

                   far = temp * 9 / 5 + 32; //use this line if Celsius to Fahrenheit

                   cel = (temp – 32) * 5 / 9; // use this line if Fahrenheit to Celsius

                   System.out.println("Fahrenheit –> Celsius: " + cel); //use this line if Celsius to Fahrenheit

                   System.out.println("Celsius –> Fahrenheit: " + far);// use this line if Fahrenheit to Celsius

          }       

}

About Head Jonathon

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• Posted on - 12/17/2012
• Question Category: Java