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Thread: New program error help

  1. #1
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    Default New program error help

    I just started programming yesterday, and I have been making little programs to learn some algorithms and the syntax of java. I tried making a program that could convert metric units into the American system. Whenever I try to compile the code, it shows up as an "incompatible type" error. I know this is probably a very obvious answer to most of you, but I can't figure it out.

    import java.util.Scanner;
    public class MetricToAmerican
    {
    public static void main(String[] args)
    {
    Scanner scan = new Scanner(System.in);
    System.out.println("\fWhat measurement would you like to convert into US system? \ncelsius, meter, or kilogram ");
    String measurement = scan.nextLine();
    {
    if (measurement = "celsius") {
    System.out.println("\fWhat is the temperature in degrees Celsius? ");
    double celsius = scan.nextDouble() ;
    double fahrenheit = celsius * 1.8 + 32 ;
    System.out.println("\fThe temperature is " + fahrenheit + " degrees Fahrenheit");
    } else if (measurement = "meter") {
    System.out.println("\fWhat is the length in meters? ");
    double meter = scan.nextDouble() ;
    double feet = meter * 3.28 ;
    System.out.println("\fThe length is " + feet + " feet");
    } else if (measurement = "gram") {
    System.out.println("\fWhat is the weight in kilograms? ");
    double kilogram = scan.nextDouble() ;
    double pound = kilogram * 2.20462 ;
    System.out.println("\fThe weight is " + pound + " pounds");
    } else {
    System.err.println("PLEASE TYPE CELSIUS METER OR KILOGRAM");
    }
    }
    }
    }

    So if you know what s wrong with this program can you please say what is wrong and maybe how to fix it so I can learn from my mistakes. Thanks.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: New program error help

    Please copy the full text of the error message and paste it here. It has important info about the error.

    Please edit your post and wrap your code with code tags:
    [code=java]
    YOUR CODE GOES HERE
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

  3. The Following User Says Thank You to Norm For This Useful Post:

    rmcm (August 31st, 2014)

  4. #3
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    Default Re: New program error help

    error message: "incompatible types"
    if (measurement = "celsius") {

  5. #4
    Super Moderator Norm's Avatar
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    Default Re: New program error help

    Use the equals() method to compare Strings.

    BTW:
    The compare for equals operator is ==
    The assignment operator is =
    If you don't understand my answer, don't ignore it, ask a question.

  6. The Following User Says Thank You to Norm For This Useful Post:

    rmcm (August 31st, 2014)

  7. #5
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    Default Re: New program error help

    Could you give an example of how I would use that equals method in the program

  8. #6
    Super Moderator Norm's Avatar
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    Default Re: New program error help

    Pass this to your favorite search engine: java equals method
    If you don't understand my answer, don't ignore it, ask a question.

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