《leetCode》:Longest Common Prefix
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题目:Write a function to find the longest common prefix string amongst an array of strings.
大意就是寻找字符串数组中所有字符的最大公共子串。
public String longestCommonPrefix(String[] strs) { if(strs == null || strs.length == 0) return ""; String pre = strs[0]; int i = 1; while(i < strs.length){ while(strs[i].indexOf(pre) != 0) pre = pre.substring(0,pre.length()-1); i++; } return pre;}
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