public static boolean deleteDir(File dir){
  if (dir != null && dir.isDirectory()) {
    String[] children=dir.list();
    for (int i=0; i < children.length; i++) {
      boolean success=deleteDir(new File(dir,children[i]));
      if (!success) {
        return false;
      }
    }
  }
  return dir.delete();
}

public static boolean deleteDir ( File dir ) { if ( dir != null && dir . isDirectory ( ) ) { String [ ] children = dir . list ( ) ; for ( int i = 0 ; i < children . length ; i ++ ) { boolean success = deleteDir ( new File ( dir , children [ i ] ) ) ; if ( ! success ) { return false ; } } } return dir . delete ( ) ; }
elimina un directorio de manera recursiva
