Triangle.java

public class Triangle {

    private int side1;
    private int side2;
    private int side3;
    private String type;

    public Triangle(int side1, int side2, int side3) throws TriangleException {

        if(isTriangle(side1, side2, side3)) {
            this.side1 = side1;
            this.side2 = side2;
            this.side3 = side3;
            this.classify();
        }
        else {
            throw new TriangleException("No es un triángulo");
        }

    }

    private boolean isTriangle(int side1, int side2, int side3) {
        if(side1 + side2 > side3) {
            if(side1 + side3 > side2) {
                if(side2 + side3 > side1) {
                    return true;
                }
            }
        }
        return false;
    }

    private void classify() {
        if(side1 == side2 && side1 == side3) {
            type = "Equilátero";
        }else if(side1 != side2 && side1 != side3) {
            type = "Escaleno";
        }else {
            type = "Isósceles";
        }
    }

    public String getType() {
        return this.type;
    }


    @Override
    public String toString() {
        return "Triangulo de lados a=" + side1 + ", b=" + side2 + ", c=" + side3 + ", tipo=" + type;
    }
}