题解 | #统计一句话中重复单词的个数#

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String line = scanner.nextLine();
        Map<Character, Integer> map = new LinkedHashMap<Character, Integer>();

        //write your code here......
        for(int i=0; i<line.length(); i++) {
            char c = line.charAt(i);
            if(Character.isLetter(c)) {
                map.put(c, map.getOrDefault(c, 0) + 1);
            }
        }

        for(Character key: map.keySet()) {
            System.out.println(key + ":" + map.get(key));
        }

    }
}