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