public class Vertex {
     double x;
     double y;

    public Vertex (double x,double y){
            this.x = x;
            this.y = y;

    }

    public String toString(){
            return "x:"+this.x+"y:"+this.y;
    }

    public void moveTo (Vertex b){
            this.x += b.x;
            this.y += b.y;
    }
    public void setTo (Vertex b){
    	this.x = b.x;
    	this.y = b.y;

    }


    }