Java CubicCurve2D.contains(double x, double y)

public boolean contains(double x,  double y)

import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.CubicCurve2D;
import java.awt.geom.Point2D;
//from ww w .ja  v  a  2  s.c o m
public class Main extends Frame {
  public static void main(String[] args) {
    new Main().setVisible(true);
  }

  public Main () {
    setSize(400, 550);
  }

  public void paint(Graphics g) {
    Graphics2D g2d = (Graphics2D) g;

    CubicCurve2D cubcurve = new CubicCurve2D.Float(30, 400, 150, 400, 200, 500, 350, 450);
    g2d.draw(cubcurve);
    
    System.out.println(cubcurve.contains(0.2F, 0.3F));
  }
}