Possible Strings with given string characters

import java.util.ArrayList;

import java.util.List;

import org.apache.commons.lang3.ArrayUtils;

import org.apache.commons.lang3.StringUtils;

public class PossibleStrings {

     

      public static void main(String[] args) {

            PossibleStrings possibleStrings = new PossibleStrings();

            possibleStrings.processAndPrint("abc");

      }

      public void processAndPrint(String text) {

            int length = text.length();

            char[] array = new char[length];

            text.getChars(0, length, array, 0);

            System.out.println("Possible Strings:");

            List<String> list = possibleStrings(new ArrayList<String>(), StringUtils.EMPTY, array);         

            for (String string : list) {

                  System.out.println(string);

            }

            System.out.println("All Possible Strings:");

            int maxWordLength = 3;

            list = allPossibleStrings(new ArrayList<String>(), StringUtils.EMPTY, array, maxWordLength);        

            for (String string : list) {

                  System.out.println(string);

            }

      }

      private List<String> possibleStrings(List<String> list, String prefix, char array[]) {

            int length = array.length;

            if (length == 0) {

                  list.add(prefix);

                  return list;

            }

            for (int index = 0; index < length; index++) {

                  possibleStrings(list, prefix + array[index], ArrayUtils.remove(array, index));

            }

            return list;

      }

     

      private List<String> allPossibleStrings(List<String> list, String prefix, char array[], int wordLength) {         

            if (wordLength == 0) {

                  return list;

            }

            int length = array.length;

            String newPrefix = null;

            for (int index = 0; index < length; index++) {

                  newPrefix = prefix + array[index];

                  list.add(newPrefix);

                  allPossibleStrings(list, newPrefix, array, wordLength-1);

            }

            return list;

      }

}

Output:

Possible Strings:

abc

acb

bac

bca

cab

cba

All Possible Strings:

a

aa

aaa

aab

aac

ab

aba

abb

abc

ac

aca

acb

acc

b

ba

baa

bab

bac

bb

bba

bbb

bbc

bc

bca

bcb

bcc

c

ca

caa

cab

cac

cb

cba

cbb

cbc

cc

cca

ccb

ccc