public class Vector2D {
	
  private float mX;
  private float mY;
  
  public Vector2D(float x, float y) {
    mX=x;
    mY=y;
  }
  
  public float getX() {
    return mX;
  }
  
  public float getY() {
    return mY;
  }
  
  
  public void add(Vector2D v) {
    mX+=v.mX;
    mY+=v.mY;
  }

  public static Vector2D add(Vector2D v1, Vector2D v2) {
		return new Vector2D(v1.getX()+v2.getX(), v1.getY()+v2.getY());
	}
	
	
}