Question

我觉得我错过了一些非常简单的东西，但我无法找到它。此代码的目标是获取莎士比亚文件并使用哈希映射来查找文本给出单词的次数以及＆＃34; n＆＃34;长字符。但是我甚至无法进入调试部分，因为我收到了错误

Bard.java:13: error: cannot find symbol
     Pattern getout = Pattern.compile("[\\w']+"); //this will take only the words
     ^   symbol:   class Pattern   location: class Bard
Bard.java:13: error: cannot find symbol
     Pattern getout = Pattern.compile("[\\w']+"); //this will take only the words

加上几个位置。非常感谢帮助。

import java.io.*;
import java.util.*;

public class Bard {

  public static void main(String[] args) {

    HashMap < String, Integer > m1 = new HashMap < String, Integer > (); // sets the hashmap

    //create file reader for the shakespere text
    try (BufferedReader br = new BufferedReader(new FileReader("shakespeare.txt"))) {
      String line = br.readLine();
      Pattern getout = Pattern.compile("[\\w']+"); //this will take only the words 

      //create the hashmap
      while (line != null) {
        Matcher m = getout.matcher(line); //find the relevent information

        while (m.find()) {
          if (m1.get(m.group()) == null && !m.group().toUpperCase().equals(m.group())) { //find new word that is not in all caps.
            m1.put(m.gourp(), 1);
          } else { //increments the onld word
            int newValue = m1.get(m.group());
            newValue++;
            m1.put(m.group, newValue);
          }
        }
        line = br.readLine();
      }
    } catch (Exception e) {
      e.printStackTrace();
    }


    try (BufferedReader br2 = new BufferedReader(new FileReader("input.txt"))) {
      String line2 = br2.readLine();
      FileWriter output = new FileWriter("analysis.txt");

      while (line2 != null) {

        if (line2.matches("[\\d\\s]+")) { // if i am dealing with the two integers 
          String[] args = line.split(" "); // split them up
          wordSize = Integer.parseInt(args[0]); // set the first on the the word size
          numberOfWords = Integer.parseInt(args[1]); // set the other one to the number of words wanted
          String[] wordsToReturn = new String[numberOfWords]; //create array to place the words
          int i = 0;
          int j;
          for (String word: m1.keySet()) { //  
            if (word.length() == wordSize) {
              wordToReturn[i] = word;
              i++;
            }


            for (j = 0; numberOfWords > j; j++) {
              output.write(wordToReturn[j]);
            }
          }
        } else {
          output.write(m1.get(line2));
        }


      }
      line2 = br2.readLine();
    } catch (Exception e) {
      e.printStackTrace();
    }

  }
}

Answer 1

您尚未导入Pattern课程。将其导入： -

import java.util.regex.*;

如何修复错误：找不到符号

1 个答案: