Max Frequency - DrawBridge


http://www.1point3acres.com/bbs/thread-136177-1-1.html
input1: thiisiisgoodd
output1: i i o d
input2: thiiisiisgoodd
output2: i
input3: this
output3: t h i s 
顺序输出出现连续次数最多的每个字符。
是韩国人[size=14.6666666666667px]面的。
刚开始用LinkedHashMap,写完之后他说能不能不用HashMap,只访问一遍。
然后坑坑巴巴的写出来了,被指出了不少bug。
感觉就是一个stack存已经找到的次数最长的,另外一个参数保存次数,如果找到更长的就empty这个stack就行了

public List<Character> getMostNumChars(String s) {
        List<Character> list = new ArrayList<>();
        if(s == null || s.isEmpty()) return list;
        int n = s.length();
        int max = 1;
        int cnt = 1;
        char prev = s.charAt(0);
        for(int i=1; i<=n; i++) { . visit 1point3acres.com for more.
                if(i < n && s.charAt(i) == prev) {
                        cnt++;
                } else {
                        if(cnt > max) {
                                max = cnt;. From 1point 3acres bbs
                                list.clear();.
                                list.add(s.charAt(i-1));
                        } else if(cnt == max) {
                                list.add(s.charAt(i-1));
                        }
                        cnt = 1;
                }
                if(i < n) prev = s.charAt(i);
        }
        return list;
}

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