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copied!<p>Here's an example using alpha transparency. You can use <a href="http://sites.google.com/site/drjohnbmatthews/composite" rel="nofollow noreferrer">this composite tool</a> to see the result of using different colors, modes and alphas.</p> <p><a href="https://i.stack.imgur.com/aj84t.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/aj84t.png" alt="image"></a></p> <pre><code>import java.awt.*; import java.awt.event.*; import java.awt.event.ActionListener; import javax.swing.*; public class AlphaTest extends JPanel implements ActionListener { private static final Font FONT = new Font("Serif", Font.PLAIN, 32); private static final String STRING = "Mothra alert!"; private static final float DELTA = -0.1f; private static final Timer timer = new Timer(100, null); private float alpha = 1f; AlphaTest() { this.setPreferredSize(new Dimension(256, 96)); this.setOpaque(true); this.setBackground(Color.black); timer.setInitialDelay(1000); timer.addActionListener(this); timer.start(); } @Override protected void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D) g; g2d.setFont(FONT); int xx = this.getWidth(); int yy = this.getHeight(); int w2 = g.getFontMetrics().stringWidth(STRING) / 2; int h2 = g.getFontMetrics().getDescent(); g2d.fillRect(0, 0, xx, yy); g2d.setComposite(AlphaComposite.getInstance( AlphaComposite.SRC_IN, alpha)); g2d.setPaint(Color.red); g2d.drawString(STRING, xx / 2 - w2, yy / 2 + h2); } @Override public void actionPerformed(ActionEvent e) { alpha += DELTA; if (alpha < 0) { alpha = 1; timer.restart(); } repaint(); } static public void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { JFrame f = new JFrame(); f.setLayout(new GridLayout(0, 1)); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.add(new AlphaTest()); f.add(new AlphaTest()); f.add(new AlphaTest()); f.pack(); f.setVisible(true); } }); } } </code></pre>

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