题解 | #查找兄弟单词#

比较两个String是不是兄弟字符串？

1. 传成 char[];
2. sort();
3. Arrays.equal(ch1[], ch2[]);

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 sc = new Scanner(System.in);
        String str = sc.nextLine();

        String[] strs = str.split(" ");
        int num = Integer.parseInt(strs[0]);
        int knum = Integer.parseInt(strs[strs.length - 1]);
        String word = strs[strs.length - 2];
        List<String> list = new ArrayList<>();
        List<String> broWords = new ArrayList<>();

        for (int i = 1; i < strs.length - 2; i++) {
            list.add(strs[i]);
        }
        char[] wordCh = word.toCharArray();
        Arrays.sort(wordCh);

        for (String s : list) {
            char[] sCh = s.toCharArray();
            Arrays.sort(sCh);
            if (!word.equals(s) && Arrays.equals(wordCh, sCh)) {
                broWords.add(s);
            }
        }
	  
        Collections.sort(broWords);
        System.out.println(broWords.size());
        if (broWords.size() > knum - 1) {
            System.out.println(broWords.get(knum - 1));
        }
    }
}