hello. I have problems with java. every time i try to compile a java applet, I get The following message: Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/tools/javac/Main What does that mean? How can I fix it? There are 3 types of people in this world, those who can count and those who can't.

Two things: What commands are you using to compile and run it? Try making your main method static if it's not already by saying public static void main(...)

I am using the "javac" command. This is a sample file that won't compile: public class nine { public void main() { System.out.println("Hello!"); } } P.S. Nine is my favorite number. Hee Hee... There are 3 types of people in this world, those who can count and those who can't.

You must have missed my second suggestion. Try putting the keyword static between public and void in your main method declaration. Does that work?

Nope. Same results. There are 3 types of people in this world, those who can count and those who can't.

try: public static void main(String args[]) also, I'm pretty sure your file must be named the same as the class containing your main method, in your case "nine.java".

hi dboy frm error it seems that javac doesnt get the exact classfile. i.e. ----- u might hav giving wrong name of file while compiling (consider CaseSensitivity also) OR ----- c if clas name is same as file name. OR i am sure u might hav done this; still check with the Classpath variable. Javac shd find classfile in ur folder where ur .class file resides. (offcourse follow standard syntax i.e public static void main(String args[] as in above comments ) hope things will work now...:) ---- yuv