Getting the Output to work

Question

Hi...,
In the void Triangleoutput part of my code, im supposed to make it Pass to the method the coordinates of the vertices, the lengths of the sides of the triangle, the measure of the angles of the triangle, and the area of the triangle. But I cant get the system out println to come out in my program when i run it. I put a few outputs in for an example of what i was trying to do. Also at the end of my code, i need to be using the my triangle method, usually i would use that when printing out my methods, but my instructions want me to put it in the triangle output part of my code, plus if i tried something like myTriangle.computeArea(); it would give me an error, even after i made it public, and im not supposed to use the public variables for this code. Thanks
import chn.util.*;
class Triangle
   double computeDistance (int x1, int y1, int x2, int y2)
        return Math.sqrt(Math.pow((x1-x2),2)+Math.pow((y1-y2),2));
   double computeAngle (double side1, double side2, double sideOpposite)
       return Math.acos(((Math.pow(side1,2)+Math.pow(side2,2))-
       Math.pow(sideOpposite,2))/(2*side1*side2));
  double radianToDegrees (double radians)
       radians=180*radians/ Math.PI;
       return radians;
  double computeArea(double side1, double side2, double side3)
        double svar = (side1+side2+side3)/2;
        return Math.sqrt(svar*(svar-side1)*(svar-side2)*(svar-side3));
    void triangleOutput (int x1, int y1, int x2, int y2, int x3, int y3,
                         double a, double b, double c,
                         double angle1, double angle2, double angle3, double area)
        System.out.println("measure of side AB" + x1+x2);
        System.out.println("measure of angle ABC" + angle2);
// End of Triangle class
public class TriangleStats
    public static void main (String[ ] args)
        ConsoleIO keyboard = new ConsoleIO();
        Triangle myTriangle = new Triangle();
        int vertex;
        System.out.println("Enter the vertex (x, y) as two numbers with a space between them:");
        vertex= keyboard.readInt();
}

Answer 1

It depends on what kind of class you consider Triangle to be.
If it's a class you want to create Triangle objects from then the class should hold the data necessary to define a triangle and the methods shouldn't be passed values. Insted the values should be held as private data of every object of Triangle. In that case you don't call,
computeArea(double side1, double side2, double side3)
you call
computeArea()
and side1, side2 and side3 are held internally to each Triangle object.
Or you consider Triangle to be a class that holds a certain set of triangle related methods together. Basically it's a class like Math for example. Then you should, as has been said, declare the methods static.