Identifer versus keyword

Question

I read in the book for OCJP for Java6 the part with assertions. I reached the part where it gives me an overview of how the compiler reacts if the word \'assert\' is used as key

Answer 1

Keywords are reserved words like new,static,public,if,else,..

An identifier can be a name of any variable.

int age = 26;

"age" here is an identifier, while int is a reserved word.

The following example won't compile:

String static = "hello";
int public = 4;

you can't do this because "static" and "public" are keywords, that in this case are being used as identifiers, which is not allowed.