Using Paint in JFrame

Question

I am trying to divide a frame into a number of different rectangles, and for some reason I can't get the paintComponent to work. Help!!

Answer 1

I was wrong in reply one. The paint method in JFrame shows up in the Container methods section, so JFrame uses paint as a Container.
import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
public class PaintingDemo extends JPanel {
  int
    width,
    height;
  int[][] circles = {
    {2,20}, {100,50}, {180,200}, {90,150}
  int[][] squares = {
    {40,90}, {100,200}, {150,300}
  int[][] rectangles = {
    {100,100}, {200,100}, {300,300}
  public PaintingDemo(int width, int height) {
    this.width = width;
    this.height = height;
    setBackground(Color.pink);
    setPreferredSize(new Dimension(width, height));
  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2 = (Graphics2D)g;
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                        RenderingHints.VALUE_ANTIALIAS_ON);
    g2.setPaint(Color.blue);
    int x,y;
    for(int i = 0; i < circles.length; i++) {
      x = circles[0];
y = circles[i][1];
g2.fill(new Ellipse2D.Double(x, y, 20, 20));
g2.setPaint(Color.red);
for(int i = 0; i < squares.length; i++)
g2.fill(new Rectangle2D.Double(squares[i][0], squares[i][1], 10, 10));
g2.setPaint(Color.orange);
for(int i = 0; i < rectangles.length; i++)
g2.fill(new Rectangle2D.Double(rectangles[i][0], rectangles[i][1], 50, 25));
public static void main(String[] args) {
JFrame f = new JFrame();
f.getContentPane().add(new PaintingDemo(400,400));
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);