题解 | #单词倒排#
单词倒排
https://www.nowcoder.com/practice/81544a4989df4109b33c2d65037c5836
感觉简单题都要用到正则
import java.util.*; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); String str = in.nextLine(); String regex = "[a-zA-Z]+"; Pattern pattern = Pattern.compile(regex); List<String> list = new ArrayList(); Matcher matcher = pattern.matcher(str); while (matcher.find()){ list.add(matcher.group()); } for(int i = list.size()-1; i >= 0; i--){ System.out.print(list.get(i)+" "); } } }