Java error .. How to fix this ?

Ok, so .. I've a simple Java app, but I can't get it working in my browser ! Works fine if I run it from cmd, but completely breaking from html

Here's a screeny :


Any ideas, tutorials ?

Update >> Changed class to public class and now I've another error ( screeny ).

 

You need to extend JApplet class. Only applets can be runned in browser. Read more about applets before.

 

Yeah, already found some great info .. now it works