java - 有没有办法 println 来枚举和列出字符串中的单词？

Question

我正在尝试编写一个java程序，该程序将计算声明句子中的单词数，然后将句子分解为单词，以便列出具有数值的单词并显示单词。我已经解决了总数，但我似乎无法分解句子中的单词，然后按时间顺序列出它们。我可以用字符来完成，但不能用文字来完成。

我已经探索了 Java Cookbook 和其他地方来寻找解决方案，但我只是不太理解它。正如我所说，我可以计算字符数，也可以计算单词数，但无法将各个单词打印在单独的行上，并在字符串中计算它们的计数值。

public class MySentenceCounter {
    public static void main(String[] args) {
        String sentence = "This is my sentence and it is not great";

        String[] wordArray = sentence.trim().split("\\s+");
        int wordCount = wordArray.length;
        for (int i=0; i < sentence.length(  ); i++)
            System.out.println("Char " + i + " is " + sentence.charAt(i)); 
        //this produces the character count but I need it to form words, not individual characters.

        System.out.println("Total is " + wordCount + " words.");
    }
}

预期结果应如下所示:

1 This
2 is
3 my
4 sentence
5 and
6 it
7 is
8 not
9 great
Total is 9 words.

Answer 1

迭代您创建的 wordArray 变量，而不是 for 循环中的原始 sentence 字符串:

public class MySentenceCounter {
  public static void main(String[] args) {
    String sentence = "This is my sentence and it is not great";
    String[] wordArray = sentence.trim().split("\\s+");
    // String[] wordArray = sentence.split(" "); This would work fine for your example sentence
    int wordCount = wordArray.length;
    for (int i = 0; i < wordCount; i++) {
      int wordNumber = i + 1;
      System.out.println(wordNumber + " " + wordArray[i]);
    }
    System.out.println("Total is " + wordCount + " words.");
  }
}

输出:

1 This
2 is
3 my
4 sentence
5 and
6 it
7 is
8 not
9 great
Total is 9 words.