给定一个字符串，请你找出其中不含有重复字符的?最长子串?的长度

 题目：给定一个字符串，请你找出其中不含有重复字符的 最长子串 的长度。

class Solution {private int count =0;private int pre =0;private List<String> list = new LinkedList<String>();public int lengthOfLongestSubstring(String s) {if(s.length()==1){pre = 1;}else{for(int i=0;i<=s.length()-2;i++){list.clear();list.add(String.valueOf(s.charAt(i)));for(int j =i+1;j<=s.length()-1;j++){if(list.contains(String.valueOf(s.charAt(j)))){count = list.size();if(count>pre){pre = count;	}break;}else {	list.add(String.valueOf(s.charAt(j)));count = list.size();if(count>pre){pre = count;	}}}}}    return pre;}
}