剑指offer05.替换空格

请实现一个函数,把字符串 s 中的每个空格替换成"%20"。

示例 1:
输入:s = "We are happy."
输出:"We%20are%20happy."

题解:

class Solution {
    public String replaceSpace(String s) {
        StringBuffer stringBuffer = new StringBuffer();
        for(int i = 0;i

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