What does dollar sign in ClassName$.class mean?

[Marcus Leon]

I know that ClassName$InnerClass.class is used for inner classes but
why does the compiler sometimes create one or more files like
ClassName$.class or ClassName$1.class?

Thanks

 

[Matt Humphrey]

I know that ClassName$InnerClass.class is used for inner classes but
why does the compiler sometimes create one or more files like
ClassName$.class or ClassName$1.class?

Anonymous inner classes:

Runnable r = new Runnable () { public void run () { doThat (); } };

Cheers,
Matt Humphrey (e-mail address removed) http://www.iviz.com/