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Thread: cannot find symbol error

  1. #1
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    Default This problem has been resolved.

    Hi, I am new to java this semester and I am getting a cannot find symbol error(calculateCentimeters,calculateFeet,calculate Yards). I am struggling to fix this, any advice would help. It is the system.out.println lines that are wrong and I must have a return in this program. Thank you.

    class inchesProgram{
     
        public static void main (String args[]){
     
            double inches = 1000.0;
     
    	ItoC(inches);// method call //
    	ItoF(inches);// method call //
    	ItoY(inches);// method call //
     
    	System.out.println("This is centimeters for 1000 inches: "+calculateCentimeters);
    	System.out.println("This is feet for 1000 inches: "+calculateFeet);
    	System.out.println("This is yards for 1000 inches: "+calculateYards);
    	}
     
        static double ItoC(double inches){
    		double calculateCentimeters;
    		calculateCentimeters = inches*2.54;
    		return calculateCentimeters;
    	}
     
        static double ItoF(double inches){
    		double calculateFeet;
    		calculateFeet = inches/12;
    		return calculateFeet;
    	}
     
        static double ItoY(double inches){
    		double calculateYards;
    		calculateYards = inches/36;
    		return calculateYards;
    	}
    }
    Last edited by Topflyt; November 5th, 2011 at 09:02 AM. Reason: issue resolved


  2. #2
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    Default Re: cannot find symbol error

    When declaring a variable, you have to give it a type. I can't just say:

    x = 7;

    I have to tell Java what the heck x is:

    int x = 7;

    Same with Strings, Objects, doubles, whatever.
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    Default Re: cannot find symbol error

    where do I declare(what lines), didn't I declare the variables in lines 17,23,29?(double calculateCentimeters, double calculateFeet, double calculateYards)?

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    Default Re: cannot find symbol error

    Quote Originally Posted by Topflyt View Post

    Your problem is here, you cannot access variables that are only defined in methods. You have to call the method:

    e.g. System.out.println("This is centimeters for 1000 inches: " +ItoC(1000) );

    System.out.println("This is centimeters for 1000 inches: "+calculateCentimeters);
    System.out.println("This is feet for 1000 inches: "+calculateFeet);
    System.out.println("This is yards for 1000 inches: "+calculateYards);
    }

    static double ItoC(double inches){
    double calculateCentimeters;
    calculateCentimeters = inches*2.54;
    return calculateCentimeters;
    }

    static double ItoF(double inches){
    double calculateFeet;
    calculateFeet = inches/12;
    return calculateFeet;
    }

    static double ItoY(double inches){
    double calculateYards;
    calculateYards = inches/36;
    return calculateYards;
    }
    }

    Try that and see if it works.

  5. The Following User Says Thank You to mccolem For This Useful Post:

    Topflyt (November 4th, 2011)

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    Default Re: cannot find symbol error

    mccolem, please read this before posting again: The Problem with Spoon-feeding
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    Default Re: cannot find symbol error

    Quote Originally Posted by Topflyt View Post
    where do I declare(what lines), didn't I declare the variables in lines 17,23,29?(double calculateCentimeters, double calculateFeet, double calculateYards)?
    Yes, but you declared them inside the method, which means they're only available inside the method. Hint- You're returning a value from those methods, but you aren't doing anything with those values.
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    Default Re: cannot find symbol error

    @mccolem Thank you, that worked. I guess i got stuck when changing a void method with a return method. When I made the public static void method it printed just as I had it in the above program, not really sure why it has to change in the return version but than you anyway.

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    Default Re: cannot find symbol error

    OK, Thank you to all who responded, much love.

  10. #9
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    Default Re: cannot find symbol error

    Those methods should almost definitely not be void.
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    Default Re: cannot find symbol error

    Thank you Kevin, I was able to get it right. I was using void methods before and what I had worked for void methods, I was stuck when I had to make a return method.

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