When I try to start Runescape I get an error message that says: CLassNotFoundException and lists Rs2Applet.class. How do I fix this so I can play?

  • 7
    Was any effort made to attempt to resolve this on your own before asking here?
    – Frank
    Aug 8, 2013 at 20:47
  • @fbueckert Um yeah. I wouldn't be asking random questions just for the fun of it. Aug 9, 2013 at 2:12
  • 5
    @YoungGuilo Except that when I did a google search for "runescape classnotfoundexception" the very first result was Jagex's support page detailing your exact problem and a solution. We ask users to show at least a little effort to solve a problem on their own before asking a question.
    – SaintWacko
    Aug 9, 2013 at 15:20
  • @SaintWacko I would have copy-pasted the contents here if I were you. ;)
    – Mugen
    Aug 10, 2013 at 14:59
  • 1
    @Mugen The answer already did so, so I didn't bother. Although I did consider linking to lmgtfy.
    – SaintWacko
    Aug 12, 2013 at 14:37

2 Answers 2


Your firewall blocks Java from downloading the RuneScape applet. Try configuring the firewall to allow Java. As some firewalls cause problems specifically with Java 7, downgrading to Java 6 may help.

Source: Jagex Support Page


Disable any proxies or proxy add ons you might have.Had the same issue and disabling the data compression proxy addon in chrome did the trick.

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