题解 | #单词倒排#
单词倒排
https://www.nowcoder.com/practice/81544a4989df4109b33c2d65037c5836
import java.util.*; // 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.hasNext()) { String str = in.nextLine(); String[] array = str.split(""); StringBuilder sb = new StringBuilder(); for (int i = 0; i < array.length; i++) { String s = array[i]; if (s.matches("[a-zA-Z]")) { sb.append(s); } else if (sb.length() > 0 && ' ' != sb.charAt(sb.length() - 1)) { sb.append(" "); } } String[] ss = sb.toString().split(" "); for (int i = ss.length - 1; i >= 0; i--) { System.out.print(ss[i] + " "); } } } }