题解 | #替换空格#

import java.util.*;


public class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     *
     * @param s string字符串
     * @return string字符串
     */
    public String replaceSpace (String s) {
        // write code here
        char[] chars = s.toCharArray();

        StringBuilder stringBuilder = new StringBuilder();
        for (int i = 0; i < chars.length; i++) {
            if (chars[i] == ' ') {
                stringBuilder.append("%20");
            } else {
                stringBuilder.append(chars[i]);
            }
        }
        return stringBuilder.toString();
    }
}