给你一个字符串，包含了空格等标点符号，要你计算出出现次数最多的字母和该字母出现的次数。

public static void main(String[] args) {
         String s= "sdfsddddddddddfffff,sdfsdf,";
         s=s.replaceAll("[^a-zA-Z]","");
         int max = 0;
         int temp = 0;
         String tempString = "";
         for(int i = 0 ;i<s.length() ; i++ ){
             tempString = s.substring(0,1);
             String subs = s.replace(s.substring(0,1),"");
             temp = s.length() - subs.length();
             if(max<temp){
                 max=temp;
             }
             s = subs;
         }
         System.out.println(tempString+" max= "+max);
}