Java AWT Graphics set new drawing color

// Changing drawing colors.
import java.awt.Color;
import java.awt.Graphics;

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

public class Main extends JPanel {
  // draw rectangles and Strings in different colors
  @Override/*from ww w.j  ava2  s  .c o m*/
  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    this.setBackground(Color.WHITE);

    // set new drawing color using integers
    g.setColor(new Color(255, 0, 0));
    g.fillRect(15, 25, 100, 20);
    g.drawString("Current RGB: " + g.getColor(), 130, 40);

    // set new drawing color using floats
    g.setColor(new Color(0.50f, 0.75f, 0.0f));
    g.fillRect(15, 50, 100, 20);
    g.drawString("Current RGB: " + g.getColor(), 130, 65);

    // set new drawing color using static Color objects
    g.setColor(Color.BLUE);
    g.fillRect(15, 75, 100, 20);
    g.drawString("Current RGB: " + g.getColor(), 130, 90);

    // display individual RGB values
    Color color = Color.MAGENTA;
    g.setColor(color);
    g.fillRect(15, 100, 100, 20);
    g.drawString("RGB values: " + color.getRed() + ", " + color.getGreen() + ", " + color.getBlue(), 130, 115);
  }

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

    Main Main = new Main();
    frame.add(Main);
    frame.setSize(400, 180);
    frame.setVisible(true);
  }
}