Directives

[ ## | // | /* */ ]	Used for documentation comments.
#define	Used to define an identifier.
#error	Used to display an error and stop preprocessor.
[ #if | #ifdef | #ifndef ]	Used for conditional compilation.
#include	Used to include a file.
#message	Used to display a message.
#undef	Used to undefined a previously defined identifier.

Example

#include <init.h>

#ifndef MAX
    #define MAX(a,v)    ((a>=b)?a:b)
#endif

#define display(msg)    System.out.println(msg)