import javax.swing.*;
import java.awt.*;
import static java.awt.Color.*;

class ShapeTest extends JPanel {
    public ShapeTest() {
        setPreferredSize(new Dimension(200, 150));
    }

    @Override
    public void paintComponent(Graphics g) {
        // ((Graphics2D)g).setRenderingHint(
        // RenderingHints.KEY_ANTIALIASING,
        // RenderingHints.VALUE_ANTIALIAS_ON);
        super.paintComponent(g);
        int[] xs = { 100, 137, 175, 175, 137, 100 };
        int[] ys = { 5, 5, 30, 55, 55, 30 };

        g.setColor(RED);
        g.drawLine(5, 5, 80, 55);
        g.setColor(GREEN);
        g.drawRect(5, 5, 75, 50);
        g.setColor(BLUE);
        g.fillOval(5, 75, 75, 50);
        g.setColor(ORANGE);
        g.drawPolygon(xs, ys, 6);
        g.setColor(CYAN);
        g.fillRect(90, 65, 75, 50);
        g.setColor(MAGENTA);
        g.fillRect(100, 75, 75, 50);
        g.setColor(YELLOW);
        g.fillRect(110, 85, 75, 50);
    }
}

void main() {
    SwingUtilities.invokeLater(() -> {
        JFrame frame = new JFrame("Graphics Sample!");
        frame.add(new ShapeTest());
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    });
}