Java 有没有办法println枚举并列出字符串中的单词？

我正在尝试编写一个java程序，该程序将计算一个声明语句中的单词数，然后将该语句分解为单词，以便列出带有数值的单词并显示单词。我已经解决了总数问题，但我似乎无法将句子中的单词分解，然后按时间顺序列出。我可以用文字，但不能用文字

我已经探索了Java烹饪书和其他地方，以找到解决方案，但我只是不太了解它。正如我所说，我可以让字符计数，我可以对单词进行计数，但是我不能让单个单词在单独的行上打印，并在字符串中使用数字值进行计数

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.");
    }
}

---

迭代您创建的

wordArray

变量，而不是for循环中的原始

语句

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.");
  }
}

---

使用IntStream而不是for循环的更优雅的解决方案：

import java.util.stream.IntStream;

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

        String[] splitted = sentence.split("\\s+");
        IntStream.range(0, splitted.length)
                .mapToObj(i -> (i + 1) + " " + splitted[i])
                .forEach(System.out::println);

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

---

尝试避免太多的复杂性，下面的方法就可以了

public class MySentenceCounter {
    public static void main(String[] args) {
        String sentence = "This is my sentence and it is not great";
        int ctr = 0;
        for (String str : sentence.trim().split("\\s+")) {
            System.out.println(++ctr + "" + str) ;
         } 
         System.out.println("Total is " + ctr + " words.");
    }
}

---

如何迭代

wordArray

而不是

句子的字母

？使用“-String”拆分将无法处理多个空格或制表符。我想应该改用“\\s+”。是的，但是示例字符串的开头或结尾没有多个空格或额外的空格（出于同样的原因，我删除了

trim（）

）。我会把它改回OP的状态。

import java.util.stream.IntStream;

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

        String[] splitted = sentence.split("\\s+");
        IntStream.range(0, splitted.length)
                .mapToObj(i -> (i + 1) + " " + splitted[i])
                .forEach(System.out::println);

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

public class MySentenceCounter {
    public static void main(String[] args) {
        String sentence = "This is my sentence and it is not great";
        int ctr = 0;
        for (String str : sentence.trim().split("\\s+")) {
            System.out.println(++ctr + "" + str) ;
         } 
         System.out.println("Total is " + ctr + " words.");
    }
}