包含不区分大小写的方法而没有重大代码更改? [英] Contains method case-insensitive without major code changes?
问题描述
有没有办法忽略 contains() 方法的大小写,但同时让代码片段或多或少保持不变?
Is there a way to ignore the case for the contains() method but at the same time leave the code snippet more or less the same?
/**
* This method returns a list of all words from the dictionary that include the given substring.
*
*/
public ArrayList<String> wordsContaining(String text)
{
int index = 0;
ArrayList<String> wordsContaining = new ArrayList<String>();
while(index<words.size())
{
if((words.get(index).contains(text)))
{
wordsContaining.add(words.get(index));
}
index++;
}
return wordsContaining;
}
这是整个 SpellChecker 类:
here is the whole SpellChecker Class:
public class SpellChecker
{
private ArrayList<String> words;
private DictReader reader;
/**
* Constructor for objects of class SpellChecker
*/
public SpellChecker()
{
reader = new DictReader("words.txt");
words = reader.getDictionary();
}
/**
* This method returns the number of words in the dictionary.
*
*/
public int numberOfWords()
{
return words.size();
}
/**
* This method returns true, if (and only if) the given word is found in the dictionary.
*
*/
public boolean isKnownWord(String word)
{
int index =0;
while(index < words.size())
{
if(words.get(index).equals(word))
{
return true;
}
index++;
}
return false;
}
/**
* This method returns true if (and only if) all words in the given wordList are found in the dictionary.
*/
public boolean allKnown(ArrayList<String> wordList)
{
for(String word : wordList)
{
if(isKnownWord(word))
{
return true;
}
}
return false;
}
/**
* This method tests the allKnown method.
*/
public boolean testAllKnown()
{
ArrayList<String> testWords = new ArrayList<String>();
testWords.add("Abu");
testWords.add("Chou");
if(allKnown(testWords))
{
return true;
}
else
{
return false;
}
}
/**
* This method returns a list of all words from the dictionary that start with the given prefix.
*
*/
public ArrayList<String> wordsStartingWith(String prefix)
{
int index = 0;
ArrayList<String> wordsStartingWith = new ArrayList<String>();
while(index<words.size())
{
if(words.get(index).startsWith(prefix))
{
wordsStartingWith.add(words.get(index));
}
index++;
}
return wordsStartingWith;
}
/**
* This method returns a list of all words from the dictionary that include the given substring.
*
*/
public ArrayList<String> wordsContaining(String text)
{
int index = 0;
ArrayList<String> wordsContaining = new ArrayList<String>();
while(index<words.size())
{
if((words.get(index).contains(text)))
{
wordsContaining.add(words.get(index));
}
index++;
}
return wordsContaining;
}
DicReader 类只需要一个给定的文本文件并从中制作"一个字典.以防万一,我会把它放起来:
The DicReader class simply takes a give text file and "Makes" a dictionary out of it. I'll put it up just in case:
public class DictReader
{
private ArrayList<String> dict;
private String filename;
/**
* Create a DictReader instance from a file.
*/
public DictReader(String filename)
{
loadDictionary(filename);
this.filename = filename;
}
/**
* Return the dictionary as a list of words.
*/
public ArrayList<String> getDictionary()
{
return dict;
}
/**
* Accept a new dictionary and save it under the same name. Use the new
* one as our dictionary from now on.
*/
public void save(ArrayList<String> dictionary)
{
try {
FileWriter out = new FileWriter(filename);
for(String word : dictionary) {
out.write(word);
out.write("\n");
}
out.close();
dict = dictionary;
}
catch(IOException exc) {
System.out.println("Error writing dictionary file: " + exc);
}
}
/**
* Load the dictionary from disk and store it in the 'dict' field.
*/
private void loadDictionary(String filename)
{
dict = new ArrayList<String>();
try {
BufferedReader in = new BufferedReader(new FileReader(filename));
String word = in.readLine();
while(word != null) {
dict.add(word);
word = in.readLine();
}
in.close();
}
catch(IOException exc) {
System.out.println("Error reading dictionary file: " + exc);
}
}
}
所以问题是我需要检查天气或给定的单词是否包含我称之为文本"的文本片段/子字符串,但是字符串的 contains 方法区分大小写.我做了一些研究,并注意到要删除区分大小写,您必须导入特定的库,并且新的 contains 方法的语法不同,它与我目前拥有的代码不能很好地配合.然后我想知道是否有办法使 contains() 不区分大小写但保留代码的结构.
So the question is I need to check weather or not a given word contains a text snippet/substring which I have called "text" however the contains method for strings is case sensitive. I have done some research and noticed that to remove the case sensitivity you must import a specific library and the syntax for the new contains method is different and it does not play well with what I currently have as code. I was then wondering if there is a way to make contains() case-insensitive but preserve the structure of the code.
推荐答案
使两个字符串都小写(或大写)
Make both strings lowercase(or uppercase)
public ArrayList<String> wordsContaining(String text)
{
int index = 0;
text = text.toLowerCase();
ArrayList<String> wordsContaining = new ArrayList<String>();
while(index<words.size())
{
if((words.get(index).toLowerCase().contains(text)))
{
wordsContaining.add(words.get(index));
}
index++;
}
return wordsContaining;
}
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