Sort ArrayList alphabetically
- by relyt
I'm trying to find all permutations of a string and sort them alphabetically.
This is what I have so far:
public class permutations {
public static void main(String args[]) {
Scanner s = new Scanner(System.in);
System.out.print("Enter String: ");
String chars = s.next();
findPerms("", chars);
}
public static void findPerms(String mystr, String chars) {
List<String> permsList = new ArrayList<String>();
if (chars.length() <= 1)
permsList.add(mystr + chars);
//System.out.print(mystr + chars + " ");
else
for (int i = 0; i < chars.length(); i++) {
String newString = chars.substring(0, i) + chars.substring(i + 1);
findPerms(mystr + chars.charAt(i), newString);
}
Collections.sort(permsList);
for(int i=0; i<permsList.size(); i++) {
System.out.print(permsList.get(i) + " ");
}
}
}
IF I enter a string "toys" I get:
toys tosy tyos tyso tsoy tsyo otys otsy oyts oyst osty osyt ytos ytso yots yost ysto ysot stoy styo soty soyt syto syot
What am I doing wrong. How can I get them in alphabetical order? Thanks!
