在Java中使用while循环来计算句子

Question

更新：在大家和一些朋友的帮助下找出它！我需要捕获字符串变量中的\ n字符以及空字符串。感谢所有评论和帮助的人！

这是给Java Intro的一个任务，我们还没有找到方法，并且当用谷歌搜索帮助时，这是唯一弹出的东西，所以我想我可能会试图问自己。

在此先感谢！

对于我们的项目，我们必须创建一个计算一些简单文本的FRI的程序，我有两个问题。

第一个问题是，使用Scanner对象和while循环从文件中计算句子时，我的计数始终是错误的+1。我可以在控制台上看到它打印出的数字是空的字符串，\ n打印出来（我正在打印到控制台，所以我可以看到变量正在被给出，而不是因为它是必需的），即使我拥有它设置为只增加我的积累变量，如果我的字符串不是空的。

任何帮助，将不胜感激！ 我不知道需要什么样的我的部分代码，但是...

  /* Count Sentences */ 
     //Scanner object to read inputText 
     Scanner countSentences = new Scanner(inputText); 

     // While loop to count sentences 
     while(countSentences.hasNext()){ 
      String sentence = countSentences.useDelimiter(SENTENCE_DELIMITERS).next(); 
      System.out.println(sentence); 
      if(sentence.compareTo("") != 0){ 
       numSentences++; 
      } 
     } 

...就是一句计数发生在位。

再次感谢！

整个代码！编辑： ////////////////////////////////

描述： 一个程序来计算计算Flesch可读性索引 */

public class Readability { 

    public static void main(String[] args) throws IOException{ 
     final double FIRST_CONSTANT = -1.015;    //First constant of FRI formula 
     final double SECOND_CONSTANT = 84.6;    //Second constant of FRI formula 
     final double THIRD_COSTANT = 206.835;    //Third constant of FRI formula 
     final String SENTENCE_DELIMITERS = "[.:;?!]";  //Sentence delimiters 
     final String WORD_DELIMITERS = "[.:;?! ,\t,\n]"; //Word delimiters 

     int numSentences = 0;        //Number of sentences in inputText 
     int numWords = 0;         //Number of words in inputText 
     int numSyllables = 0;        //Number of syllables in each word in inputText 

     String standardText = "This is just a test.";  //Standard Text for testing 
     String inputText = "";        //Holds the text being tested currently 

     /* Ask user if they want to run a text analysis */ 
     int choice = JOptionPane.showConfirmDialog(null, "Do you want to run a text analysis?", "Start the Flesch Reading Ease Test", JOptionPane.YES_NO_OPTION); 

     /* Message Displayed if 'No' selected, and program exits */ 
     if(choice == JOptionPane.NO_OPTION) { 
      JOptionPane.showMessageDialog(null, "The program exits. Good Bye!"); 
      System.exit(0); 
     } 

     /* If user selects 'Yes' */ 
     // Ask user if they have a text file or wish to use the standard text 
     choice = JOptionPane.showConfirmDialog(null, "Answer \"Yes\" if you want to read the text from a file!\nAnswer \"No\" if you want a test run on a standard text.", "Select the input!", JOptionPane.YES_NO_OPTION); 

      /* If user selects 'Yes' */ 
      if(choice == JOptionPane.YES_OPTION){ 
       // Ask user for filename 
       String inputFileName = JOptionPane.showInputDialog("Enter input file name with extension!\nInclude the path if file is not in the project folder!"); 

        // User presses cancel, set inputText to standardText 
        if(inputFileName == null){ 
         inputText = standardText; 
        } 

        // User presses enter, create file object using user input as filename 
        else{ 
         File file = new File(inputFileName); 

        // Check if file exists, if file exists create scanner object to read text from file 
        if(file.exists()){ 
         Scanner readFile = new Scanner(file); 

         // Read the file line by line and collect the concatenated lines in the variable inputText 
         while(readFile.hasNext()){ 
          String fileSentences = readFile.nextLine(); 
          inputText += fileSentences + "\n"; 
         } 
        } 
        // If file doesn't exist, set inputText to the standardText 
        else { 
         inputText = standardText; 
        } 
        } 
      } 

      /* If user selects 'No' */ 
      else{ 
       inputText = standardText; 
      }  

      /* Count Sentences */ 
      //Scanner object to read inputText 
      Scanner countSentences = new Scanner(inputText); 

      // While loop to count sentences 
      while(countSentences.hasNext()){ 
       String sentence = countSentences.useDelimiter(SENTENCE_DELIMITERS).next(); 
       System.out.println(sentence); 
       if(sentence.length() != 0){ 
        numSentences++; 
       } 
       System.out.println(numSentences); //This println prints the correct number to the console 
      } 
      System.out.println(numSentences); //This println prints +1 

      //Close countSentences scanner 
      countSentences.close(); 

      /* Count Words */ 
      //Scanner object to read inputText 
      Scanner countWords = new Scanner(inputText); 

      // While loop to count words and increment syllable count per word (rule #3: each word has at least one syllable) 
      while(countWords.hasNext()){ 
       String word = countWords.useDelimiter(WORD_DELIMITERS).next(); 

       if(word.compareTo("") != 0){ 
        numWords++; 
        //numSyllables++; 
       } 

       // For loop to count syllables as each word is read 
       for(int k = 0; k < word.length(); k++){ 
        char letter = word.charAt(k); 


       } 
      } 

    //Test// 
    System.out.println(inputText); 
    System.out.println(numSentences); 
    System.out.println(numWords); 
    System.out.println(numSyllables); 
    } 

} 

Answer 1

这是工作程序。它给了我作为导致2

import java.util.Scanner; 
    public class Scannerd { 

     public static String inputText = "What!? That is awful!"; 

     public static String SENTENCE_DELIMITERS = "[.:;?!]"; 

      public static void main(String... arg) { 
       int numSentences = 0; 

       Scanner countSentences = new Scanner(inputText); 

       // While loop to count sentences 
       while (countSentences.hasNext()) { 
       String sentence = countSentences.useDelimiter(SENTENCE_DELIMITERS).next(); 
       System.out.println(sentence); 
       if(sentence.compareTo("") != 0){ 
        numSentences++; 
       } 

       } 
       System.out.println("#ofSentences"+numSentences); 
      } 
    } 

Answer 2

看起来它使用在一开始默认的分隔符，因为自定义分隔符在循环内部使用。 试试这个。

import java.util.Scanner; 公共类TestScanner {

public static String inputText =“What！？That is awful！”;

public static String SENTENCE_DELIMITERS =“[。：;？！]”;

public static void main(String... arg) { 
     int numSentences = 0; 

     Scanner countSentences = new Scanner(inputText); 
     countSentences.useDelimiter(SENTENCE_DELIMITERS); 
     // While loop to count sentences 
     while (countSentences.hasNext()) { 
     //String sentence = countSentences.useDelimiter(SENTENCE_DELIMITERS).next(); 
      String sentence = countSentences.next(); 
     System.out.println(sentence); 
     if(sentence.compareTo("") != 0){ 
      numSentences++; 
     } 

     } 
     System.out.println("#ofSentences"+numSentences); 
    } 

}