import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JFrame;
public class MyCanvas extends JComponent {
private static Color m_tRed = new Color(255, 0, 0, 150);
private static Color m_tGreen = new Color(0, 255, 0, 150);
private static Color m_tBlue = new Color(0, 0, 255, 150);
private static Font monoFont = new Font("Monospaced", Font.BOLD
| Font.ITALIC, 36);
private static Font sanSerifFont = new Font("SanSerif", Font.PLAIN, 12);
private static Font serifFont = new Font("Serif", Font.BOLD, 24);
private static ImageIcon rntsoftLogo = new ImageIcon("rntsoft.gif");
public void paintComponent(Graphics g) {
super.paintComponent(g);
// draw entire component white
g.setColor(Color.white);
g.fillRect(0, 0, getWidth(), getHeight());
// yellow circle
g.setColor(Color.yellow);
g.fillOval(0, 0, 240, 240);
// magenta circle
g.setColor(Color.magenta);
g.fillOval(160, 160, 240, 240);
// paint the icon below blue sqaure
int w = rntsoftLogo.getIconWidth();
int h = rntsoftLogo.getIconHeight();
rntsoftLogo.paintIcon(this, g, 280 - (w / 2), 120 - (h / 2));
// paint the icon below red sqaure
rntsoftLogo.paintIcon(this, g, 120 - (w / 2), 280 - (h / 2));
// transparent red square
g.setColor(m_tRed);
g.fillRect(60, 220, 120, 120);
// transparent green circle
g.setColor(m_tGreen);
g.fillOval(140, 140, 120, 120);
// transparent blue square
g.setColor(m_tBlue);
g.fillRect(220, 60, 120, 120);
g.setColor(Color.black);
g.setFont(monoFont);
FontMetrics fm = g.getFontMetrics();
w = fm.stringWidth("Java Source");
h = fm.getAscent();
g.drawString("Java Source", 120 - (w / 2), 120 + (h / 4));
g.setFont(sanSerifFont);
fm = g.getFontMetrics();
w = fm.stringWidth("and");
h = fm.getAscent();
g.drawString("and", 200 - (w / 2), 200 + (h / 4));
g.setFont(serifFont);
fm = g.getFontMetrics();
w = fm.stringWidth("Support.");
h = fm.getAscent();
g.drawString("Support.", 280 - (w / 2), 280 + (h / 4));
}
public Dimension getPreferredSize() {
return new Dimension(400, 400);
}
public Dimension getMinimumSize() {
return getPreferredSize();
}
public static void main(String args[]) {
JFrame mainFrame = new JFrame("Graphics demo");
mainFrame.getContentPane().add(new MyCanvas());
mainFrame.pack();
mainFrame.setVisible(true);
}
}