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    <p>When doing anything based on a timer in Swing, the <a href="http://docs.oracle.com/javase/7/docs/api/javax/swing/Timer.html" rel="nofollow"><code>javax.swing.Timer</code></a> class is your best friend.</p> <p>It's JavaDocs explains its usage pretty well, so here's an example.</p> <pre><code>public class GTest extends JFrame implements ActionListener { private Color textColor = Color.BLACK; private Random random = new Random(); @Override public void paint(Graphics g) { super.paint(g); g.setColor(textColor); g.drawString("[Game goes here]", 100, 150); } @Override public void actionPerformed(ActionEvent e) { textColor = new Color(random.nextInt(0x00ffffff)); repaint(); } public GTest() { setSize(Toolkit.getDefaultToolkit().getScreenSize().width / 3, Toolkit.getDefaultToolkit().getScreenSize().width / 3 + 50); setDefaultCloseOperation(EXIT_ON_CLOSE); Timer timer = new Timer(500, this); timer.setInitialDelay(0); timer.start(); setVisible(true); } public static void main(String[] args) { GTest myWindow = new GTest(); } } </code></pre> <p>It's your <code>GTest</code> class once again, but this time the text color changes automatically every 0.5 seconds.</p> <p>Notice two main changes:</p> <ol> <li>The constructor now sets up a new instance of <code>Timer</code> with no initial delay, period of 500 ms and its listener set up to <code>this</code>. That means that this constructed instance will listen to that timer's ticks.</li> <li>To do that, we needed to implement the <code>ActionListener</code> interface. This forces us to write the <code>actionPerformed()</code> method which gets called every time the Timer ticks. In this method, we change the textcolor to a random one and call <code>repaint()</code> which subsequently calls our <code>paint()</code> method and gets the text written.</li> </ol> <hr> <p>P.S. You don't have to <code>dispose()</code> your <code>Graphics</code> object every time. It's actually said in its JavaDoc, too (emphasize mine):</p> <blockquote> <p>Graphics objects which are provided as arguments to the <code>paint()</code> and <code>update()</code> methods of components are automatically released by the system when those methods return. For efficiency, programmers should call <code>dispose()</code> when finished using a <code>Graphics</code> object <em>only if it was created directly from a component or another <code>Graphics</code> object</em>.</p> </blockquote>
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    1. COFeel free to ask any questions.
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    2. COThis is really helpful. Also wondering, how would you change the text size? I tried the two parameters for drawText but that didn't work.
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    3. CO@Sam From [this question](http://stackoverflow.com/questions/10630738/how-to-set-strings-font-size-style-in-java-using-font-class), for example, `setFont(getFont().deriveFont(18f));` should work in JFrame. Try googling `java swing font size` to get more answers.
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