I want to create Triangle objects and use them, what am I doing wrong? I have triangle.java here, and CTriangle and STriangle have similar issues.

public class Triangle extends Object { // Include some appropriate fields. These should not be public. // Your triangles are defined by side lengths, which are positive ints. // Put your own Javadoc comments for all methods please. // Here a, b, c should be the side lengths. // Throw an IllegalArgumentException if any of the following happen: // a, b, c are not all positive // a, b, c do not obey the triangle inequality. private static int a; private static int b; private static int c; public Triangle (int a, int b, int c) throws IllegalArgumentException { if (isTriangle (a,b,c)==false) throw new IllegalArgumentException("Not a Triangle!"); Triangle.a = a; Triangle.b = b; Triangle.c = c; } public static int[ ] getSideLengths ( ) { Triangle T1 = new Triangle(1,1,1); Triangle T2 = new Triangle(1,1,1); System.out.println("Please enter the six inputs, each followed by hitting the enter key."); BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String input = null; try { input = br.readLine(); T1.a = Integer.parseInt(input); System.out.println("T1.a = " + T1.a); input = br.readLine(); T1.b = Integer.parseInt(input); System.out.println("T1.b = " + T1.b); input = br.readLine(); T1.c = Integer.parseInt(input); System.out.println("T1.c = " + T1.c); input = br.readLine(); T2.a = Integer.parseInt(input); System.out.println("T2.a = " + T2.a); input = br.readLine(); T2.b = Integer.parseInt(input); System.out.println("T2.b = " + T2.b); input = br.readLine(); T2.c = Integer.parseInt(input); System.out.println("T2.c = " + T2.c); } catch (IOException e) { System.out.println("Error!"); System.exit(1); } int[] sidelengths = {T1.a, T1.b, T1.c, T2.a, T2.b, T2.c}; for (int i=0; i<sidelengths.length; i++) { System.out.print(sidelengths[i] + " , "); } return sidelengths; } /*public boolean STriangle (int a, int b, int c){ boolean striangle = false; if (a==b && b==c) striangle = true; return striangle; }*/ // We explicitly won't be using the following getAngles method. // Please DON'T implement it. // Using angles to test for similarity is risky, since the values you // get back may be subject to rounding error. // // return the 3 angles, in radians. These should sum to 3.14159... // public double[ ] getAngles ( ) { // } // do not include any setter methods. // Triangles are not mutable. // true if the triangle contains a right angle. public static boolean isRight (int a, int b, int c) { if ((a*a)+(b*b)==(c*c)) return true; if ((b*b)+(c*c)==(a*a)) return true; if ((a*a)+(c*c)==(b*b)) return true; else return false; /* formula for a right triangle * */ } // true if the triangle contains an angle greater than 90 degrees. public static boolean isObtuse (int a, int b, int c ) { if ((a*a)+(b*b)<(c*c)) return true; else return false; /* formula for an obtuse triangle * */ } // true if the triangle is not right or obtuse. public static boolean isAcute ( int a, int b, int c) { if ((a*a)+(b*b)>(c*c)) return true; else return false; /* formula for an acute triangle * */ } // true if a,b,c are the side lengths for a legitimate triangle. // useful for testing arguments you want to pass to the constructor. public static boolean isTriangle (int a, int b, int c) { if (a+b<c || a<=0) return false; if (a+c<b || b<=0) return false; if (b+c<a || c<=0) return false; else return true; } // always want one of these. public static String toString(Triangle d) { return "(" +d.a+" ,"+ d.b+" ,"+ d.c+ ")"; } // This is the method you'll need in part 2. // @Override // public boolean equals (Object o) { // } public static void main(String [] args){ Triangle T1 = new Triangle(1,1,1); Triangle T2 = new Triangle(1,1,1); int[] a1 = (getSideLengths()); /*test*/ System.out.println("To String - " + toString(T1)); if (T1.isTriangle(a, b, c)==true){ System.out.println("The first one is a triangle"); System.out.print("The second one is "); if (T1.isTriangle(a, b, c)==false) System.out.print("not "); System.out.println("a triangle"); if (T1.isAcute(a, b, c)==true && T1.isRight(a, b, c)==false) System.out.println("The first one is an acute triangle"); if (T2.isAcute(a, b, c)==true && T2.isRight(a, b, c)==false) System.out.println("The second one is an acute triangle"); if (T1.isObtuse(a, b, c)==true && T1.isRight(a, b, c)==false) System.out.println("The first one is an obtuse triangle"); if (T2.isObtuse(a, b, c)==true && T2.isRight(a, b, c)==false) System.out.println("The second one is an obtuse triangle"); if (T1.isRight(a, b, c)==true) System.out.println("The first one is a right triangle"); if (T2.isRight(a, b, c)==true) System.out.println("The second one is a right triangle"); if (Triangle.CTriangle(a, b, c, a, b, c)==true) { System.out.println("Those are congruent triangles"); System.out.println("Those are similar triangles"); } else if (Triangle.STriangle(a, b, c, a, b, c)==true) System.out.println("Those are similar triangles"); } else System.out.println("The first one is not a triangle"); } }