简单的java拼写检查器/检查字典中是否存在单词

Question

我正在编写一个简单的拼写检查器。只是为了检查用户文本的拼写与一个小字典文件的拼写并进行比较。

“dictionary.txt”文件包含：

my
name
is

这是我检查用户文本并将其与字典进行比较的代码：

import java.util.Scanner;
import java.io.File;

public class SpellChecker
{
    public static void main(String[] args) throws Exception
    {
        Scanner write = new Scanner(System.in);

        System.out.println("Type a sentence and I will check your spelling/correct words :)");
        String sentence = write.nextLine();
        String[] splitSentence = sentence.split(" ");

        for(int i = 0; i < splitSentence.length; i++)
        {
            Scanner read = new Scanner(new File("dictionary.txt"));

            while(read.hasNextLine())
            {
                String compare = read.nextLine();

                if(compare.equalsIgnoreCase(splitSentence[i]))
                {
                    System.out.println(splitSentence[i] + " : correct");
                }
                else
                {
                    System.out.println(splitSentence[i] + " : incorrect");
                }
            }
        }
    }
}

这是我得到的输出。

Type a sentence and I will check your spelling/correct words :)
Heyo my name is Ivam
Heyo : incorrect
Heyo : incorrect
Heyo : incorrect
my : correct
my : incorrect
my : incorrect
name : incorrect
name : correct
name : incorrect
is : incorrect
is : incorrect
is : correct
Ivam : incorrect
Ivam : incorrect
Ivam : incorrect

以下是我预期的输出：

Type a sentence and I will check your spelling/correct words :)
Heyo my name is Ivam
Heyo : incorrect
my : correct
name : correct
is : correct
Ivam : incorrect

Answer 1

试试这个。

public static void main(String[] args) throws Exception {
    Set<String> dictionary = new HashSet<>(Files.readAllLines(Paths.get("dictionary.txt")));
    java.util.Scanner write = new Scanner(System.in);
    System.out.println("Type a sentence and I will check your spelling/correct words :)");
    String sentence = write.nextLine();
    String[] splitSentence = sentence.split(" ");
    for (String word : splitSentence)
        if (dictionary.contains(word))
            System.out.println(word + " : correct");
        else
            System.out.println(word + " : incorrect");
}

输出

Type a sentence and I will check your spelling/correct words :)
Heyo my name is Ivam
Heyo : incorrect
my : correct
name : correct
is : correct
Ivam : incorrect

Answer 2

在while 循环之外有一个boolean 标志，并在while 之外添加一个检查，如下所示

...
boolean isCorrect = false;
while(read.hasNextLine()) {
  String compare = read.nextLine();
  if (compare.equalsIgnoreCase(splitSentence[i])) {
    isCorrect = true;
    break;
  }
}

if (isCorrect) {
  System.out.println(splitSentence[i] + " : correct");
} else {
  System.out.println(splitSentence[i] + " : incorrect");
}
...

Answer 3

我已经测试了下面的代码，它按预期工作。每当您在字典中找到一个单词时，对于每个单词，您都可以将标志设置为 true 并打破循环。如果最后没有找到一个单词，可以检查这个标志并打印它是不正确的。

import java.util.Scanner;
import java.io.File;

public class test
{
    public static void main(String[] args) throws Exception
    {
        Scanner write = new Scanner(System.in);

        System.out.println("Type a sentence and I will check your spelling/correct words :)");
        String sentence = write.nextLine();
        String[] splitSentence = sentence.split(" ");
        
        for(int i = 0; i < splitSentence.length; i++)
        {
            Scanner read = new Scanner(new File("dictionary.txt"));
            boolean found = false;
            while(read.hasNextLine())
            {
                String compare = read.nextLine();

                if(compare.equalsIgnoreCase(splitSentence[i]))
                {
                    System.out.println(splitSentence[i] + " : correct");
                    found=true;
                    break;
                }
            }
            if(!found)
               System.out.println(splitSentence[i] + " : incorrect");
        }
    }
}

Answer 4

我看到的问题是，while 循环将运行特定单词与字典中的每个单词进行比较，因此返回多个结果。一种解决方案是，如果正确找到该单词，则在控制台打印出它是正确的，否则，当且仅当它已遍历所有字典并且没有找到匹配项时，才打印出它不正确.

在这种情况下，它通过将字符串设置为不正确的默认值来解决，并且只有在找不到匹配项时才更改为正确。然后在循环结束时它只打印最新的结果字符串。我还在循环外初始化了变量，所以它不是每次都完成，因为它是不必要的。

以下是解决方案的工作原理：

import java.util.Scanner;
import java.io.File;

public class SpellChecker
{
    public static void main(String[] args) throws Exception
    {
        Scanner write = new Scanner(System.in);

        System.out.println("Type a sentence and I will check your spelling/correct words :)");
        String sentence = write.nextLine();
        String[] splitSentence = sentence.split(" ");

        
        String result = null;
        String compare = null;
        Scanner read = null;

        for(int i = 0; i < splitSentence.length; i++)
        {
            read = new Scanner(new File("dictionary.txt"));

            result = "incorrect";
            
            while(read.hasNextLine())
            {
                compare = read.nextLine();

                if(compare.equalsIgnoreCase(splitSentence[i]))
                {
                    result = "correct";
                    break;
                }
                
            }
            
            System.out.println(splitSentence[i] + " : " + result);
        }
    }
}