An easy way to deploy JAR/JAD content on all phones with GPRS is to create a WML site and provide a link to the JAR file that you have. [As an aside, the whole J2ME scene is so fragmented that it sucks completely. Let’s hope Android sorts it out.]

Here’s how you go about setting up that in Lighttpd:

Add these mimetypes (to lighttpd.conf or mime-types.conf):

mimetype.assign += (
  ".wml"     =>      "text/vnd.wap.wml",
  ".wmlc"   =>      "application/vnd.wap.wmlc",
  ".wmls"   =>      "text/vnd.wap.vmlscript",
  ".vmlsc"  =>      "application/vnd.wap.wmlscriptc",
  ".wbmp"   =>     "image/vnd.wap.wbmp",
  ".jar"      =>      "application/java-archive",
  ".jad"     =>      "text/vnd.sun.j2me.app-descriptor"
)

Add the index.wml file as a valid DirectoryIndex:

server.indexfiles    += ("index.wml")

Make this .wml file and upload it somewhere (replace JARCLIENT with your .jar file, and JADCLIENT with your .jad file):

<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"
"http://www.wapforum.org/DTD/wml_1.1.xml">

<wml>
<card title="Download">

<p>Download the Jar file:</p>
<p>
<a href="JARCLIENT.jar">Download</a>
</p>
<p>
<a href="JADCLIENT.jad">Download (JAD)</a>
</p>

</card>
</wml>

Restart your server, and that should be it! If you’re using Apache, the steps are similar.