题解 | #最长公共前缀#没啥好说的

public class Solution {
    /**
     * 
     * @param strs string字符串一维数组 
     * @return string字符串
     */
    public String longestCommonPrefix (String[] strs) {
        // write code here
        if(strs == null || strs.length == 0){
            return "";
        }
        String first = strs[0];
        if(strs.length == 1){
            return first;
        }
        StringBuffer sb = new StringBuffer();;
        for(int i = 0;i<first.length();i++){
            char next = first.charAt(i);
            boolean has = true;
            for(int j = 0;j<strs.length;j++){
                if(i >= strs[j].length() || strs[j].charAt(i) != next){
                    has = false;
                }
            }
            if(has){
                sb.append(next);
            }
        }
        return sb.toString();
    }
}