如何从Java中的txt文件中仅提取单词 [英] How to extract ONLY words from a txt file in Java

问题描述

所以我必须从文本文件中提取数据.

So I have to extract data from a text file.

这样设置文本文件.

3400      Moderate
310       Light
etc.

我需要提取数字，将它们存储在一个数组中，然后将字符串存储在另一个数组中，以便我可以根据数组中写入的内容对数字进行计算，然后将其输出到文件中.我已经讲完了最后一部分，当我从txt中提取数据时，我只是想不出如何从字符串中分离整数.文件.

I need to extract the numbers, store them in one array, and the strings, and store them in another array so I can do calculations to the numbers based on whats written in the array, and then output that to a file. I've got the last part down, I just cant figure out how to separate the ints from the strings when I extract the data from the txt. file.

这是我现在拥有的，但是它只是将int和单词提取为 String .

Here is what I have now, but it's just extracting the int and the word as a String.

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

public class HorseFeed {
public static void main(String[] args){

    Scanner sc = null;
    try {
        sc = new Scanner(new File("C:\\Users\\Patric\\Desktop\\HorseWork.txt"));
    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    List<String> lines = new ArrayList<String>();
    while (sc.hasNextLine()) {
      lines.add(sc.nextLine());
    }

    String[] arr = lines.toArray(new String[0]);

    for(int i = 0; i< 100; i++){
        System.out.print(arr[i]);
    }

}

}

推荐答案

plz，请遵循代码.

plz, follow the code.

import java.io.*;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class HorseFeed {

    public static void main(String[] args) throws FileNotFoundException, IOException {

        List<String> lineList = new ArrayList<String>();
        BufferedReader br = new BufferedReader(new FileReader(new File("C:\\Users\\Patric\\Desktop\\HorseWork.txt")));
            String line;
            while ((line = br.readLine()) != null) {
                Pattern pattern = Pattern.compile("[0-9]+");
                Matcher matcher = pattern.matcher(line);
                if( pattern.matcher(line).matches()){  
                    while(matcher.find()){
                        lineList.add(matcher.group());
                    }

                }
            }
        }

    }

其中lineList包含您的整数.

here lineList contains your integer.

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