Java tutorial
import java.awt.Color; import java.awt.Graphics; import java.awt.Graphics2D; import javax.swing.JFrame; import javax.swing.JPanel; public class Rectangles extends JPanel { public void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D) g; g2d.setColor(new Color(212, 212, 212)); g2d.drawRect(10, 15, 90, 60); g2d.setColor(new Color(31, 21, 1)); g2d.fillRect(250, 195, 90, 60); } public static void main(String[] args) { Rectangles rects = new Rectangles(); JFrame frame = new JFrame("Rectangles"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(rects); frame.setSize(360, 300); frame.setLocationRelativeTo(null); frame.setVisible(true); } }