Please give me suggestions about Triangle extends Polygon ,which implements interface Drawable.

public class Triangle extends Polygon implements Drawable {

	Color triangleColor;
	Polygon triangleShape;
	int currentX;
	int currentY;
	
	
	public Triangle() {
		Triangle t = makeDefaultTriangle();
		setColor(t.getColor());
		setShape(t.getShape());
		setPosition(t.getX(),t.getY());
	}
	
	
	public Triangle(Color c,Polygon p,int x,int y) {
		setColor(c);
		setShape(p);
		setPosition(x,y);
	}
	
	
		public void setColor(Color c) {
			triangleColor = c;
		}
		
		
		public Color getColor() {
			return triangleColor;
		}
		
		
		public void setShape(Polygon p) {
			triangleShape = new Polygon(p.xpoints,p.ypoints,p.npoints);
		}
		
		
		public Polygon getShape() {
			return triangleShape;
		}
		
		
		public void setX(int x) {
			currentX = x;
		}
		
		
		public int getX() {
			return currentX;
		}
		
		
		public void setY(int y) {
			currentY = y;
		}
		
		
		public int getY() {
			return currentY;
		}
		
		
		public void setPosition(int x,int y) {
			setX(x);
			setY(y);
		}
		
		
		public void paint(Graphics g) {
			Color c = getColor();
			Polygon p = getShape();
			int[] x = (int[]) p.xpoints.clone();
			int[] y = (int[]) p.ypoints.clone();
			int n = p.npoints;
			
			for(int i = 0;i < n; i++) {
				x[i] += getX();
				y[i] += getY();
			}
			
			p = new Polygon(x,y,n);
			
			g.setColor(c);
			g.fillPolygon(p);
		}
		
		public static Triangle makeDefaultTriangle() {
			int[] x = {0,3,0};
			int[] y = {0,0,4};
			Color c = Color.WHITE;
			
			Polygon p = new Polygon(x,y,x.length);
			return new Triangle(c,p,0,0);
		}
}