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Engineering LibreTexts

3.13: Java Examples

  • Page ID
    10632
  • Temperature

    // This program asks the user for a Fahrenheit temperature, 
    // converts the given temperature to Celsius,
    // and displays the results.
    //
    // References:
    // https://www.mathsisfun.com/temperature-conversion.html
    // https://en.wikibooks.org/wiki/Java_Programming
    
    import java.util.*;
    
    class Main {
        private static Scanner input = new Scanner(System.in);
    
        public static void main(String[] args) {
            double fahrenheit;
            double celsius;
            
            fahrenheit = getFahrenheit();
            celsius = calculateCelsius(fahrenheit);
            displayResult(fahrenheit, celsius);
        }
    
        private static double getFahrenheit() {
            double fahrenheit;
            
            System.out.println("Enter Fahrenheit temperature:");
            fahrenheit = input.nextDouble();
            
            return fahrenheit;
        }
    
        private static double calculateCelsius(double fahrenheit) {
            double celsius;
            
            celsius = (fahrenheit - 32) * 5 / 9;
            
            return celsius;
        }
    
        private static void displayResult(double fahrenheit, double celsius) {
            System.out.println(fahrenheit + "° Fahrenheit is " + 
                celsius + "° Celsius");
        }
    }
    

    Output

    Enter Fahrenheit temperature:
     100
    100° Fahrenheit is 37.7777777777778° Celsius