Calculate the maximum ordered string in any unordered string

Calculate the maximum ordered string in any unordered string

Private void compare () {// define an unordered String str = "sdifsdafsdabfwqicweedio"; // place it in a hashset to deduplicate A HashSet
 
  
Set = new HashSet
  
   
(); For (int I = 0; I <str. length (); I ++) {set. add (str. charAt (I);} System. out. println ("set =" + set); Object [] list = set. toArray (); Object temp = ""; // bubble sort for (int I = 0; I <list. length; I ++) {for (int j = I; j <list. length; j ++) {char ch = (Character) list [I]; char ca = (Character) list [j]; if (ch> ca) {temp = list [I]; list [I] = list [j]; list [j] = temp ;}}} // This for is used to conveniently display the result String result = ""; for (int I = 0; I <list. length; I ++) {result + = "" + list [I];} System. out. println ("ordered string =" + result );}