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>();

        //遍历输入的字符串
        for(char c:line.toCharArray()){
            //如果是大写或小写字母，则添加到map中，并将出现次数作为键对应的值存到map
            if((c>='a'&&c<='z')||(c>='A'&&c<='Z')){
                map.put(c,map.getOrDefault(c,0)+1);
            }
        }

        Set<Map.Entry<Character, Integer>> entrys = map.entrySet();
        for (Map.Entry<Character, Integer> entry : entrys) {
            System.out.println(entry.getKey() + ":" + entry.getValue());
        }
    }
}