Java applet to check Java version

Out product only requires Java 1.4 (or higher) but we want to require Java 1.5. About 10% of applet requests used Java 1.4 so we want a way to notify the users who use Java 1.4 that they should upgrade. Searching with Google I couldn't find any such applet so here is my version.


JavaVersionCheck.class:

import javax.swing.*;

/**
* Prints the <code>message</code> if the java version doesn't match
* <code>javaVersionPattern</code>.
* @author James Stauffer
*/
public class JavaVersionCheck extends JApplet {
   public void init() {
       try {
           String javaVersionPattern = getParameter("javaVersionPattern");
           String message = getParameter("message");
           if(VersionMatches(javaVersionPattern)) {
               add(new JLabel(message));
           }
       } catch (Exception e) {
           e.printStackTrace();
       }
   }

   public static boolean VersionMatches(String javaVersionPattern) {
       String javaVersion = System.getProperty("java.version");
       return javaVersion.matches(javaVersionPattern);
   }

   public static void main(String args[]) {
       if(args.length > 0) {
           String javaVersionPattern = args[0];
           if(VersionMatches(javaVersionPattern)) {
               if(args.length > 1) {
                   System.out.println(args[1]);
               } else {
                   System.out.println("Matches " + javaVersionPattern);
               }
           }
       }
   }
}

HTML:

<applet height="30" width="300" code="JavaVersionCheck.class">
   <param name="javaVersionPattern" value="^1\.4.*">
   <param name="message" value="Java 1.4 is not supported.  Please upgrade to 1.5.">
</applet>