(中兴笔试题)求一个字符串中的最长子串

今天参加了中兴的笔试题，感觉不是很难！

还好吧！

就是聊的时候觉得自己的表达能力不是很好！需要锻炼啊！

?

public static String find(String str){if(str.equals("")){return "";}else{int maxLen = 0;int curLen = 0;String maxSub = "";String curSub = "";char pre = ' ';for(int i=0; i<str.length(); i++){char cur = str.charAt(i);if(cur==pre){curLen++;curSub += cur;}else{if(curLen>maxLen){maxLen = curLen;maxSub = curSub;}pre = cur;curSub = ""+cur;curLen = 0;}}return maxSub;}}

?