Java AWT Graphics2D set radial gradient paint

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RadialGradientPaint;
import java.awt.RenderingHints;
import java.awt.geom.Ellipse2D;
import java.util.Random;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class Main extends JPanel {
  Random rnd = new Random();
  @Override//  w  w  w  .  jav a  2 s .c o m
  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    
    Graphics2D g2d = (Graphics2D) g;
    g2d.setBackground(Color.WHITE);
    g2d.clearRect(0, 0, getParent().getWidth(), getParent().getHeight());
    // antialising
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

    //Ellipse2D
    Ellipse2D ellipse = new Ellipse2D.Float(50, 50, 100, 70);
    
    float[] dists = { .3f, 1.0f};
    Color[] colors = {Color.RED, Color.BLACK};
    RadialGradientPaint gradient1 = new RadialGradientPaint(50, 50, 100, dists, colors);
    g2d.setPaint(gradient1);
    g2d.fill(ellipse);

    
  }

  public static void main(String[] args) {
    // create frame for Main
    JFrame frame = new JFrame("java2s.com");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    Main Main = new Main();
    frame.add(Main);
    frame.setSize(300, 210);
    frame.setVisible(true);
  }
}