面试题 输出频率最高且最先出现的字符

 public static void main(String[] args) {
        String data = "hello world,every body!";
        Map<Character,Integer> countMap = new HashMap<Character,Integer>();
        for(int i=0;i<data.length();i++) {
            char c = data.charAt(i);
            if (countMap.containsKey(c)) {
                countMap.put(c, countMap.get(c) + 1); //重复出现加一次
            } else {
                countMap.put(c, 1); //该字符第一次出现
            }
        }
        for(Map.Entry<Character, Integer> me:countMap.entrySet()){
            System.out.println(me.getKey()+"\t" + me.getValue());
        }
        List<Character> list = new ArrayList<Character>();
        int max=0;
        for(Map.Entry<Character, Integer> me:countMap.entrySet()) {
            if (me.getValue() < max) {
                continue;
            }
            if (me.getValue() == max) {
                list.add(me.getKey());
            }
            if(me.getValue() > max) {
                list.clear();
                max = me.getValue();
                list.add(me.getKey());
            }
        }
        System.out.println("*************************");
        for(Character c:list){
            System.out.println("次数出现最多的字母:"+c+"  出现次数为:"+ max);
        }
    }