/** * Cleans a directory without deleting it. * * @param directory directory to clean * @throws IOException in case cleaning is unsuccessful */ 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) { // null if security restricted throw new IOException("Failed to list contents of " + directory); } IOException exception = null; for (int i = 0; i < files.length; i++) { File file = files[i]; try { forceDelete(file); } catch (IOException ioe) { exception = ioe; } } if (null != exception) { throw exception; } }