接收一个空格间隔的多个单词组成的字符串将字符串中的每个单词的首字母改为大写并返回修改后的字符串。示例：输入：hello world输出：Hello World输入：i am a student输出：I Am A Studentpythondef capitalize_wordss words = ssplit capitalized_words = wordcapitalize for

法：

public static String capitalizeWords(String s) { String[] words = s.split(" "); StringBuilder sb = new StringBuilder(); for (String word : words) { sb.append(Character.toUpperCase(word.charAt(0))); sb.append(word.substring(1)); sb.append(" "); } return sb.toString().trim(); }

调用示例：

String s = "hello world"; System.out.println(capitalizeWords(s)); // 输出 "Hello World"

s = "i am a student"; System.out.println(capitalizeWords(s)); // 输出 "I Am A Student