题解 | #字符串排序#
字符串排序
https://www.nowcoder.com/practice/5190a1db6f4f4ddb92fd9c365c944584
import java.util.*; // mark // list.sort((o1, o2) -> Character.toLowerCase(o1) - Character.toLowerCase(o2)); // list.sort(Comparator.comparingInt(Character::toLowerCase)); // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); while (in.hasNextLine()) { String s = in.nextLine(); int length = s.length(); List<Character> letterList = new ArrayList<>(); for (int i = 0; i < length; i++) { char c = s.charAt(i); if (Character.isLetter(c)) { letterList.add(c); } } letterList.sort(Comparator.comparingInt(Character::toLowerCase)); int j = 0; StringBuilder sb = new StringBuilder(); for (int i = 0; i < length; i++) { char c = s.charAt(i); if (Character.isLetter(c)) { sb.append(letterList.get(j++)); } else { sb.append(c); } } System.out.println(sb.toString()); } } }