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copied!<p>Trivially, as long as the synchronized methods do not execute on the <a href="http://download.oracle.com/javase/6/docs/api/java/awt/EventQueue.html" rel="nofollow"><code>EventQueue</code></a>, they won't block the event dispatch thread. Conversely, a method executing on another thread should <em>always</em> use the <a href="http://download.oracle.com/javase/6/docs/api/java/awt/EventQueue.html" rel="nofollow"><code>EventQueue</code></a> to dispatch code via <code>invokeLater()</code>, <code>invokeAndWait()</code>, or a related mechanism such as <a href="http://download.oracle.com/javase/6/docs/api/javax/swing/Timer.html" rel="nofollow"><code>javax.swing.Timer</code></a> or <a href="http://download.oracle.com/javase/6/docs/api/javax/swing/SwingWorker.html" rel="nofollow"><code>javax.swing.SwingWorker</code></a>. As a practical matter, these are reliable. The examples <em>may</em> be correct, but they should be examined from this perspective.</p> <p>The <a href="http://download.oracle.com/javase/6/docs/api/java/awt/EventQueue.html" rel="nofollow"><code>EventQueue</code></a> API says, "The only requirements are that events...are dispatched...in the same order as they are enqueued." In my opinion, this is tantamount to the "happens-before" relation of <a href="http://download.oracle.com/javase/6/docs/api/java/util/concurrent/package-summary.html" rel="nofollow"><code>java.util.concurrent</code></a> and the JLS. A more detailed discussion may be found <a href="https://groups.google.com/forum/#!msg/comp.lang.java.gui/sWKy5Oo8s3E/IqcnQ7Y6Sa0J" rel="nofollow">here</a>.</p>

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