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Thread: cannot find symbol variable radius?

  1. #1
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    Question cannot find symbol variable radius?

    public class solvearea{
     
        public static double calculatearea(){
     
            double methodArea = (radius*2)*3.1416;
            return methodArea;
    }
        public static void main (String[]args){
            System.out.println("Enter shape: ");
            System.out.println("1.Circle, 2.Rectangle, 3.Square, 4.Triangle.");
            System.out.println("Enter number: ");
            double choice = Keyboard.readDouble();
            //circle
            if(choice == 1){
                System.out.println("You have chosen circle... ");
                System.out.println("Enter radius");
                double radius = Keyboard.readDouble();
                double theArea = calculatearea();
                System.out.println(theArea);
       }
    }
    help pls....


  2. #2
    Super Moderator helloworld922's Avatar
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    Default Re: cannot find symbol variable radius?

    simple, you left out the parameter radius from the computearea method

    public static double computearea(double radius)

  3. #3
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    Default Re: cannot find symbol variable radius?

    uhm...where do i put that code?

    o tried " public static double calculatearea(double radius){ "
    doesnt work...
    it says cannot be applied to

  4. #4
    Java kindergarten chronoz13's Avatar
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    Red face Re: cannot find symbol variable radius?

    i copied your first code..
    theres no variable 'radius' and
    theres no 'Keyboard' class

  5. #5
    Super Moderator helloworld922's Avatar
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    Default Re: cannot find symbol variable radius?

    changes are in bold

    [b]import java.util.Scanner;[/b]
     
    public class solvearea{
     
    	public static double calculatearea([b]double radius[/b])
    	{
     
    		double methodArea = (radius * 2) * 3.1416;
    		return methodArea;
    	}
     
    	public static void main(String[] args)
    	{
    		[b]Scanner keyboard = new Scanner(System.in);[/b]
    		System.out.println("Enter shape: ");
    		System.out.println("1.Circle, 2.Rectangle, 3.Square, 4.Triangle.");
    		System.out.println("Enter number: ");
    		double choice = [b]k[/b]eyboard.readDouble();
    		// circle
    		if (choice == 1)
    		{
    			System.out.println("You have chosen circle... ");
    			System.out.println("Enter radius");
    			double radius = [b]k[/b]eyboard.readDouble();
    			double theArea = calculatearea([b]radius[/b]);
    			System.out.println(theArea);
    		}
    	}
    }
    Last edited by helloworld922; October 4th, 2009 at 11:42 AM.

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