Problem

Write a Java program Temp, that converts celcius to fahrenheit or vice versa.
The program should:

• prompt the user for a 1-character string c (celcius) or f (fahrenheit) that tells the program which unit you are entering
• prompt the user for the temperature
• output the solution followed by a c or f to denote the final units

Example: User inputs "c" and "10" would result in "50f"

Use the following formula to convert your units

F = 9C/5 + 32

...by students

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Solution

Start by importing the swing java package.

 import javax.swing.*;

Define your variables, we will need doubles in case of decimal results, and a string value for the unit

double temperature, result;
String unit;

Next start by capturing the user input using JOptionPane. We will need to use Integer.parseInt to cast the String result to an integer for the temperature.

unit = JOptionPane.showInputDialog("Enter the 1-character temperature you want to convert from c (Celcius) or f (Fahrenheit)") ;
temperature = Integer.parseInt(JOptionPane.showInputDialog("Enter the current temperature in the units you speficied"));

Code

Solution Code

import javax.swing.*;

public class  Temp
{

	public static void main(String[] args)
	{
		double temperature, result;
		String unit;
		unit = JOptionPane.showInputDialog("Enter the 1-character temperature you want to convert from c (Celcius) or f (Fahrenheit)") ;
		temperature = Integer.parseInt(JOptionPane.showInputDialog("Enter the current temperature in the units you speficied"));

		if (unit.charAt(0) == 'c')
		{
			result = 9 * temperature / 5 + 32;
			System.out.println(temperature + " degree Celcius = " + result + " degree Fahrenheit");
		}
		else if (unit.charAt(0) == 'f')
		{
			result = (temperature - 32) * 5 / 9;
			System.out.println(temperature + " degree Fahrenheit = " + result + " degree Celcius");
		}


	}

}