Java strings are all sorted and de-weighed

To sort by recursion,

Use TreeSet to weigh.

    public static  void  
        String str = "AVCV";
        
        List List = Digui (str);
        System.out.println (List.size ());
        for (Object o:list) {
            
        
    }
    public static List Digui (String str) {
        List List =new ArrayList ();
        if (str.length () = = 1) {
            List.add (str);
        }
        for (int i = 0;i < Str.length (); i++) {
            String f = str.substring (i,i+1);
            String res = str.substring (0,i) +str.substring (i+1);
            List px = Digui (res);
            for (int j = 0;j<px.size (); j + +) {
                List.add (F+px.get (j). ToString ());
            }
        }
        return  list;
    }
}

Java strings are all sorted and de-weighed