Thread: 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

Questions? Problems?

You use an 'if' statement:

if ( resultsOfFirstMethod )
{
    area();
}

Originally Posted by GregBrannon

You use an 'if' statement:

if ( resultsOfFirstMethod )
{
    area();
}

Sorry, I don't quite understand

Expanding it for you:

    if ( isValid( side1, side2, side3 ) )
    {
        area(side1,side2,side3);
    }

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

Ahhh. Glad to help. You're welcome.