public class Punkt
{
    double x; 
    double y;
    
    public Punkt(double _x, double _y) {
        x = _x; 
        y = _y;
        
    }
    public void verschieben ( double _x, double _y ){
        x = x + _x;
        y = y + _y;
    }
    public String toString(){
        return "P(" + x + "|" + y + ")";
    }
}