question: public static void cleanDirectory ( File directory ) throws IOException { if ( ! directory . exists ( ) ) { String message = directory + " does not exist" ; throw new IllegalArgumentException ( message ) ; } if ( ! directory . isDirectory ( ) ) { String message = directory + " is not a directory" ; throw new IllegalArgumentException ( message ) ; } File [ ] files = directory . listFiles ( ) ; if ( files == null ) { throw new IOException ( "Failed to list contents of " + directory ) ; } IOException exception = null ; for ( File file : files ) { try { forceDelete ( file ) ; } catch ( IOException ioe ) { exception = ioe ; } } if ( null != exception ) { throw exception ; } }
target:  Cleans a directory without deleting it.