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Thread: Converting Fahrenheit to Celsius

  1. #1
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    Default Converting Fahrenheit to Celsius

    So here is my code.... i really need help with it. I am completely new to this and going through the book, I came up with this. I am trying to display the answer in celsius and farenheit. I want to enter a farenheit into the program and it comes out in celsius.

    import javax.swing.*;
    public class FahrenheitToCelsius
    {
    public static void main (string[] args)
    {
    double fahrenheit;
    double celsius;

    input = JOptionPane.showInputDialog
    (null,"Temperature in Farenheit");
    fahrenheit = Doube.parseDouble(input);

    celsius = (fahrenheit -32)*(5/9)

    JOptionPane.showMessageDialog
    (null,"The Temperature in Celsius is" + celsius);
    }
    }
    Last edited by remedys; August 22nd, 2012 at 02:14 AM.


  2. #2
    Super Moderator jps's Avatar
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    Default Re: Converting Fahrenheit to Celsius

    So what is the problem?
    What error message do you get?

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    Default Re: Converting Fahrenheit to Celsius

    ----jGRASP exec: javac -g FahrenheitToCelsius.java

    ----jGRASP wedge2 error: command "javac" not found.
    ---- This command must be in the current working directory
    ---- or on the current PATH to use this function.
    ---- PATH is ";C:\Program Files (x86)\Java\jre7\bin;C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live;C:\Windows\system32;C:\Windows;C:\Windows\Sys tem32\Wbem;C:\Windows\System32\WindowsPowerShell\v 1.0\;C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files (x86)\Windows Live\Shared;C:\Program Files (x86)\QuickTime\QTSystem\".
    ----jGRASP: operation complete.

    lol and then when i happen to run it... It says

    no main methods, applets, or MIDlets found in file.

    im using the program JGrasp

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    Super Moderator jps's Avatar
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    Default Re: Converting Fahrenheit to Celsius

    Do you have javac installed?
    Open a terminal and type:
    javac -version
    If you have it installed, it will show the version number. If that is the case include it in your path.
    If it is not installed, install it.

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    Default Re: Converting Fahrenheit to Celsius

    Thank you for helping . It worked after I did that and i had to change the code a little . I added String input; also I had to mess with the equation . It wouldn't let me use 5/9 I had to change it to .55 Any reasons why ?

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    Default Re: Converting Fahrenheit to Celsius

    Quote Originally Posted by remedys View Post
    It wouldn't let me use 5/9 I had to change it to .55 Any reasons why ?
    It what? jGRASP?

    What did "it" say in the error message I assume you saw? Warning perhaps?

    5/9 would never change so using .55 would just be a bit more optimized than doing an unnecessary division. I am just guessing jGRASP was being picky about it, but I have never used jGRASP or see the message (from jGRASP or other..).

  7. The Following User Says Thank You to jps For This Useful Post:

    remedys (December 3rd, 2012)

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