question: public SuffixFileFilter ( String [ ] suffixes , IOCase caseSensitivity ) { if ( suffixes == null ) { throw new IllegalArgumentException ( "The array of suffixes must not be null" ) ; } this . suffixes = new String [ suffixes . length ] ; System . arraycopy ( suffixes , 0 , this . suffixes , 0 , suffixes . length ) ; this . caseSensitivity = caseSensitivity == null ? IOCase . SENSITIVE : caseSensitivity ; }
target:  Constructs a new Suffix file filter for an array of suffixs specifying case-sensitivity. <p> The array is not cloned, so could be changed after constructing the instance. This would be inadvisable however.