Thread: User-Defined Methods

I am writing a program for my Java class that takes the length of two sides of a right triangle, and calculates the hypotenuse, as well as the sine, cosine, and tangent of each non-right angle of the right triangle. The calculations for the hypotenuse, sine, cosine, and tangent should be placed in separate methods.
I keep getting two errors when I try to declare my methods, 'class' expected and ')' expected. I cannot figure out what I am doing wrong, any help would be appreciated.

import java.util.*;
import static java.lang.Math.*;
 
public class RightTriangle
{
 
     public static void main(String[] args)
    {
 
     double a, b, c;
 
     System.out.println("Please enter first length"
     + " of side of the triangle", a);
     a = console.nextDouble();
     System.out.println("The opposite side of the"
     + "triangle is ", a);
 
    System.out.println("Please enter second length"
     + " of side of the triangle", b);
     b = console.nextDouble();
     System.out.println("The adjacent side of the"
     + "trianlge is ", b);
 
     c =((a*a) + (b*b));
     hypotenuse = c*c;
     System.out.println("The hypotenuse of the triangle"
     + "is ", hypotenuse);
 
     sine(double a, double c);
 
     cosine(double b, double c);
 
     tangent(double b, double c);
 
    }
 
    public static double getSine(double a, double c)
    {
     double opp;
     double hyp;
 
     opp = a.getNum();
     hyp = c.getNum();
 
     sine = opp/hyp;
     System.out.println("The sine of the triangle"
     + "is ", sine);
     }
 
     public static double getCosine(double b, double c)
     {
     double adj;
     double hyp;
 
     adj = b.getNum();
 
     hyp = c.getNum();
 
     cosine = adj/hyp;
     System.out.println("The cosine of the triangle"
     + "is ", cosine);
     }
 
     public static double getTangent(double a, double b)
     {
     double opp;
     double adj;
 
     opp = a.getNum();
     adj = b.getNum();
 
     tangent = a/b;
     System.out.println("The tangent of the triangle"
     + "is ", tangent);
     }
 
}

Originally Posted by Junky

String s = "hello world";
System.out.println(String s);

What is wrong with the above code?

System.out.println(s);