ciao a tutti come posso rifattorizzare questi metodi con gli stream di java? grazie mille
codice:public static String reverse(String str) { ArrayList<Character> list = new ArrayList<>(); for (int i = 0; i < str.length(); i++) { if (Character.isAlphabetic(str.charAt(i))) { list.add(str.charAt(i)); } } Collections.reverse(list); Iterator<Character> iterator = list.iterator(); String result = ""; for (int i = 0; i < str.length(); i++) { if (Character.isAlphabetic(str.charAt(i))) { result = result + iterator.next(); } if (Character.isDigit(str.charAt(i))) { result = result + str.charAt(i); } } return result; } ////////////////////////////////////////////////////// public static boolean doubleLetters(String word) { for (int i = 0; i < word.length()-1; i++){ if (word.charAt(i) == word.charAt(i+1)){ return true; } } return false; } //////////////////////////////////////////////////// public static String indexShuffle(String str) { String odd = ""; String even = ""; int count = 0; for (char i : str.toCharArray()) { if (count % 2 == 0) { even += str.charAt(count); } else { odd += str.charAt(count); } count++; } return even + odd; }