Write a main function in Java, print out all the different permutations of 1-6 of these six digits

1, 2, 2, 3, 4, 5 these six digits, write a main function in Java, print out all the different permutations, such as: 512234, 412345, etc. requirements: "4" can not be in third place, "3" and "5" can not be connected.

Package com.test;
Import java.util.ArrayList;
 
Import java.util.List;
　/** * 1, 2, 2, 3, 4, 5 these six digits, write a main function in Java, print out all the different permutations, such as: 512234, 412345, etc. requirements: "4" can not be in third place, "3" and "5" can not be connected. * * @author SIMONE wangxinsh55@126.com 2009-6-12 * * public class Grouptest {public static list<string> List
 　　　 = new Arraylist<string> (); /** * All sorting combinations of * constructed strings * @param str will be combined into the character * @param nstr source string set/public static void Group (S)
　　　　　　　　　　　 Tring str, string nstr) {if (Str.length ()!= nstr.length ()) {String rest = Getrest (str, NSTR);
　　　　　　　　　　　　　　　 for (int i = 0; i < rest.length (); i++) {String temp = str + rest.substring (i, i + 1); if (Temp.indexof ("4")!= 2 && temp.indexof ("1") = = && temp.indexof ("53") = = 1) {//filter display conditions, such as
　　　　　　　　　　　　　　　　　　　 The decision to remove this is to list all of the character set permutations and combinations System.out.println (temp);
　　　　　　　　　　　　　　　　　　　 if (!list.contains (temp)) {List.add (temp);
　　　　　}　　　　　　　　　　　　　　 Group (temp, NSTR); /** * Removes the character to be grouped from the source string * * @param str will be combined into the character * @param nstr source Word
　　　　　　　 String Set * @return remaining set of strings */public static string Getrest (String str, string nstr) {String rest = "";
　　　　　　　　　　　 if (Nstr.length () > Str.length ()) {rest = Nstr; for (int i = 0; i < str.length (); i++) {rest = Rest.replacefirst (str.substring (i, i + 1), "");/Note the
　　　 Replacefirst, instead of ReplaceAll} return rest;
　　　　　　　 public static void Main (string[] args) {Group ("", "122345");
　　　 System.out.println (List.tostring ()); }
}