<awangdev>[lint]. Unique Characters_1.java
public boolean isUnique(String str) {
    	if (str == null || str.length() == 0) return true;

    	char[] arr = str.toCharArray(); 
		Arrays.sort(arr);
    	for (int i = 1; i < arr.length; i++) {
			if (arr[i] == arr[i - 1]) return false;
    	}
    	return true;
    }
public boolean var_0 ( String var_2 ) {
  if ( var_2 == null || var_2 . length ( ) == 0 ) return true ;
  char [ ] var_7 = var_2 . toCharArray ( ) ;
  Arrays . sort ( var_7 ) ;
  for ( int var_11 = 1 ;
  var_11 < var_7 . length ;
  var_11 ++ ) {
    if ( var_7 [ var_11 ] == var_7 [ var_11 - 1 ] ) return false ;
  }
  return true ;
}
