如何比较循环中两个不同文件的两个字符串 [英] How do I compare two strings from two different files in a loop

问题描述

就像我的程序打算用行号打印出文件2中找不到的单词。但是，我的程序循环有些混乱。



我尝试过：

Like my program supposed to print out the words that are not found in file 2 with the line number. However, my program's loop is kind of messed up.

What I have tried:

import java.util.Scanner;
import java.io.*;
public class SpellCheck{
    public static void main(String[] arg) throws FileNotFoundException{
        Scanner readPaper = new Scanner(new File("1.txt"));
  
        while(readPaper.hasNextLine()){
        String line = readPaper.next();
        Scanner linescan = new Scanner(line);
        String wordInPaper = linescan.next();
        
        
        Scanner readDict = new Scanner(new File("2.txt"));
        String wordIn = readDict.next();
        if(!wordInPaper.contains(wordIn))
          System.out.print(wordInPaper);
          } 
              }
}

推荐答案

将文件1的所有单词读入数组或某种类型的清单。将文件2中的所有单词读入单独的数组中。使用循环或迭代器测试第一个列表中的每个单词，看它是否在第二个单词中。如果找不到该单词，则将其写出来。

Read all the words of file 1 into an array or list of some type. Read all the words from file 2 into a separate array. Use a loop or iterator to test every word from the first list to see if it is in the second. If the word is not found then write it out.

不使用数组，字典或其他容器对性能不利。链接列表或某个向量怎么样？你的工作结果也应该是字典和性能比较的替代方案



如果真的不可能，那么读取一个字符串对象中的第二个文件并在一个步骤中搜索文件1的每个单词。我知道这是一个糟糕的解决方案，但它没有数组：-O

Not to use an array, dictionary or other container is bad for performance. What about a linked list or some vector? Result of your work should also be an alternative like dictionary and a performance comparison

If really not possible, than read the second file in a one string object and search every word of file 1 in a single step. I know that it is a bad solution, but it is without an array :-O

试试这个：

Try this:

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

public class SpellCheck{
    public static void main(String[] arg) throws FileNotFoundException{
        String dictionary = "";
        Scanner readDict = new Scanner(new File("2.txt"));
        // Build the dictionary list from file 2
        while(readDict.hasNext()){
            String word = readDict.next();
            dictionary = dictionary + " " + word;
        }
        System.out.println("Dict: " + dictionary);
        
        Scanner readPaper = new Scanner(new File("1.txt"));
        while(readPaper.hasNext()){
            String wordInPaper = readPaper.next();
            System.out.println("wordInPaper: " + wordInPaper);
            if(!dictionary.contains(wordInPaper))
            	System.out.println("Not found: " + wordInPaper);
        }
    }
}

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