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import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class BasicShapes extends JPanel {
public void paint(Graphics g) {
BufferedImage bimage = new BufferedImage(200, 200,
BufferedImage.TYPE_BYTE_INDEXED);
Graphics2D g2d = bimage.createGraphics();
Color transparent = new Color(0, 0, 0, 0);
g2d.setColor(transparent);
g2d.setComposite(AlphaComposite.Src);
g2d.fill(new Rectangle2D.Float(20, 20, 100, 20));
g2d.dispose();
}
public static void main(String[] args) {
JFrame frame = new JFrame("Basic Shapes");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new BasicShapes());
frame.setSize(350, 250);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}
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