设计一个 DealSentence（句子处理器） 类 ，包含：反向、分词、变大写的功能（ 反向功能，可利用字符串的 ToCharArray()方法，然后数组用 Array 的成员函数 Reverse()来实现；分词功能，可利用字符串类的 Split()方法）

Designing a `DealSentence` class in Java can be accomplished by implementing the required methods for reversing a sentence, splitting it into words, and capitalizing each word. Here's an example of how you could structure this class:

public class DealSentence {
    private String sentence;

    // 构造函数
    public DealSentence(String sentence) {
        this.sentence = sentence;
    }

    // 反转句子方法
    public String reverse() {
        char[] chars = sentence.toCharArray();
        int start = 0;
        int end = chars.length - 1;
        while (start < end) {
            char temp = chars[start];
            chars[start] = chars[end];
            chars[end] = temp;
            start++;
            end--;
        }
        return new String(chars);
    }

    // 分词方法
    public String[] splitWords() {
        return sentence.split(" ");
    }

    // 变大写方法，遍历每个单词并转换首字母为大写
    public String[] toUpperCaseWords() {
        String[] words = splitWords();
        StringBuilder[] uppercasedWords = new StringBuilder[words.length];
        for (int i = 0; i < words.length; i++) {
            String word = words[i];
            uppercasedWords[i] = new StringBuilder(word).toUpperCase().substring(0, 1) + word.substring(1);
        }
        return uppercasedWords;
    }
}

使用这个类的例子：

public static void main(String[] args) {
    DealSentence processor = new DealSentence("Hello world, how are you?");
    String reversed = processor.reverse();       // "you? are how world, Hello"
    String[] splitWords = processor.splitWords(); // ["Hello", "world,", "how", "are", "you?"]
    String[] uppedWords = processor.toUpperCaseWords();   // ["Hello", "WORLD,", "HOW", "ARE", "YOU?"]

    // 打印结果
    System.out.println("Reversed: " + reversed);
    System.out.println("Split Words: " + Arrays.toString(splitWords));
    System.out.println("Uppercase Words: " + Arrays.toString(uppedWords));
}