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Thread: Passing a boolean value through a method?

  1. #1
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    Default Passing a boolean value through a method?

    this is the exercise that I am currently working on:
    Write a test program that reads three sides for a triangle and computes the area if the input is valid. Otherwise, it displays that the input is invalid.

    package Chapter05;
    import java.util.Scanner;
    public class MyTriangle {
        public static void main(String[] args) {
            Scanner input = new Scanner(System.in);
     
            System.out.print("Enter three points for a triangle: ");
            double side1 = input.nextDouble();
            double side2 = input.nextDouble();
            double side3 = input.nextDouble();
            area(side1,side2,side3);
        }
     
        public static boolean isValid(double side1, double side2, double side3) {
            if(side1 + side2 > side3 
               && side1 + side3 > side2
               && side2 + side3 > side1) {
               return true;
            }
            else if(side1 + side2 < side3 
                    || side1 + side3 < side2
                    || side2 + side3 < side1) {
                System.out.println("Invalid");
            }
            return false;
        }
     
        public static double area(double side1, double side2, double side3) {
            double area = 0;
            if(isValid(side1,side2,side3)) {
            double S = (side1 + side2 + side3)/2;
            area = Math.sqrt(S * (S - side1)* (S - side2) * (S - side3));
     
            }
     
            return area;
        }   
    }

    How do I pass the value in the method isValid to run the method Area? When ever I run my code and put in the values for Side1,Side2, and Side3 my program just says Build Successful


  2. #2
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    Default Re: Passing a boolean value through a method?

    Questions? Problems?

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    Mr.JavaNoob (November 29th, 2013)

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    Default Re: Passing a boolean value through a method?

    You use an 'if' statement:
    if ( resultsOfFirstMethod )
    {
        area();
    }

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

    Mr.JavaNoob (November 29th, 2013)

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    Default Re: Passing a boolean value through a method?

    Quote Originally Posted by GregBrannon View Post
    You use an 'if' statement:
    if ( resultsOfFirstMethod )
    {
        area();
    }

    Sorry, I don't quite understand

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    Default Re: Passing a boolean value through a method?

    Expanding it for you:
        if ( isValid( side1, side2, side3 ) )
        {
            area(side1,side2,side3);
        }

  8. The Following User Says Thank You to GregBrannon For This Useful Post:

    Mr.JavaNoob (November 29th, 2013)

  9. #6
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    Default Re: Passing a boolean value through a method?

    Thanks Greg I got it. looks like I was forgetting System.out.println(area); Thanks a lot.

  10. #7
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    Default Re: Passing a boolean value through a method?

    Ahhh. Glad to help. You're welcome.

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