替换空格

剑指 Offer 05. 替换空格

public static String replaceSpace(String s) {        
        StringBuffer sb = new StringBuffer();
        int n = s.length();
        for (int i = 0; i < n; i++) {
            char c = s.charAt(i);
            if (c != ' ') {
                sb.append(String.valueOf(c));
            }
            else {
                sb.append("%20");
            }
        }
        return sb.toString();
    }