The Java™ language is 
case-sensitive.
Therefore, when       you write the name of a Java package, class or method in       a .4gl
source, it must match the exact name as if you were writing a Java program. The 
fglcomp       compiler takes
care of this, and writes case-sensitive class and method names in
the .42m       p-code       modules.
IMPORT JAVA java.util.regex.Pattern
MAIN
  DEFINE p java.util.regex.PATTERN   -- Note the case error
END MAIN
 
With this code example, fglcomp will raise error -6622 at
line 3, because the       "java/util/PATTERN" name cannot be found.