question: public boolean isInstanceOf ( Object obj , Class < ? > clz ) { if ( obj == null || clz == null ) { if ( log . isLoggable ( Level . FINEST ) ) { log . finest ( "isInstanceOf error: obj=" + obj + " clz=" + clz ) ; } return false ; } return clz . isAssignableFrom ( obj . getClass ( ) ) ; }
target:  This method determines whether the supplied object is an instance of the supplied class/interface.