blocks|key|3805435|text|有一个名为equalsIgnoreCase的字符串方法可以做您想做的事情。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3805436|equalsignorecase.htm|3805437|entityMap|0|LINK|mutability|MUTABLE|url|http://www.tutorialspoint.com/java/java_string_equalsignorecase.htm^0|5|G|0|0|K|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|S|8|@]|D|@$9|T|A|U|1|V]]|E|$]]|$1|H|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]]]

There's a string method called <code>equalsIgnoreCase</code> that may do what you want.

<a href="http://www.tutorialspoint.com/java/java_string_equalsignorecase.htm" rel="nofollow">http://www.tutorialspoint.com/java/java_string_equalsignorecase.htm</a>

blocks|key|3862952|text|假设您正在处理字符串，则可以使用str.equalsIgnoreCase(strToCompare)循环遍历列表或设置并进行检查。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3862953|entityMap^0|G|Y|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Assuming you are working with strings, you can loop through the List or Set and check using <code>str.equalsIgnoreCase(strToCompare)</code>.

blocks|key|3805469|text|让我们调用您的字符串输入。执行以下操作以检查是否相同，忽略大写化。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3805470|boolean+isItEqual+=+input.equalsIgnoreCase("I+am+the+string+you+want!+:D");|code-block|syntax|javascript|3805471|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Lets call your string input. Do the following to check if its the same, ignoring capitalization.

<pre><code>boolean isItEqual = input.equalsIgnoreCase("I am the string you want! :D");
</code></pre>

blocks|key|3862998|text|您可以尝试使用该模式的Pattern.CASE_INSENSITIVE。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3862999|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You can try Pattern.CASE_INSENSITIVE with the Pattern.

blocks|key|3805509|text|在我看来，你有三种选择(有些已经说过了)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3805510|STRING.toLowerCase.contains()；|unordered-list-item|3805511|STRING.equalsIgnoreCase()；|3805512|带有的正则表达式|3805513|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$]]|$1|E|3|F|5|D|7|M|8|@]|9|@]|A|$]]|$1|G|3|H|5|D|7|N|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|O|8|@]|9|@]|A|$]]]|J|$]]

Seems to me like you have three options (some have already been stated).

<ul>
<li>STRING.toLowerCase.contains();</li>
<li>STRING.equalsIgnoreCase();</li>
<li>A regex with [a-zA-Z]</li>
</ul>

blocks|key|3805525|text|我不明白你为什么不能使用String.equalsIgnoreCase()。这不需要Regex。如果使用List，则可以在此Predicate中使用.stream().anyMatch()。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3805526|c+->+c.equalsIgnoreCase(data)|code-block|syntax|javascript|3805527|代码示例：|3805528|public+static+void+main(String[]+args)+throws+Exception+{
++++List<String>+check+=+new+ArrayList()+{{
++++++++add("dog");++
++++++++add("CAT");
++++++++add("oWl");
++++++++add("GiraFFe");
++++}};

++++Scanner+scanner+=+new+Scanner(System.in);
++++System.out.print("Enter+data:+");
++++String+data+=+scanner.nextLine();

++++if+(check.stream().anyMatch(c+->+c.equalsIgnoreCase(data)))+{
++++++++System.out.println("Data+found");
++++}+else+{
++++++++System.out.println("Data+not+found");
++++}
}|3805529|结果：|3805530|Enter+data:+gIRAffE
Data+found

Enter+data:+lamb
Data+not+found|3805531|entityMap^0|C|P|16|5|1G|4|1Q|9|22|K|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]|$9|Z|A|10|B|C]|$9|11|A|12|B|C]|$9|13|A|14|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|16|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|17|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|18|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|19|8|@]|D|@]|E|$I|J]]|$1|S|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|T|$]]

I don't understand why you can't use <code>String.equalsIgnoreCase()</code>. <code>Regex</code> is not needed for this. If you use a <code>List</code>, you can use <code>.stream().anyMatch()</code> with this <code>Predicate</code>:

<pre><code>c -&gt; c.equalsIgnoreCase(data)
</code></pre>

Code Sample:

<pre><code>public static void main(String[] args) throws Exception {
 List&lt;String&gt; check = new ArrayList() {{
 add("dog"); 
 add("CAT");
 add("oWl");
 add("GiraFFe");
 }};

 Scanner scanner = new Scanner(System.in);
 System.out.print("Enter data: ");
 String data = scanner.nextLine();

 if (check.stream().anyMatch(c -&gt; c.equalsIgnoreCase(data))) {
 System.out.println("Data found");
 } else {
 System.out.println("Data not found");
 }
}
</code></pre>

Results:

<pre><code>Enter data: gIRAffE
Data found

Enter data: lamb
Data not found
</code></pre>

blocks|key|3863061|text|您可以暂时将两个字符串转换为小写或大写，然后进行匹配。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3863062|for(int+i=0;i<myList.length-1;i%2B%2B){
+++++++if(myString.toLowerCase().contains(myList.get(i).toLowerCase())){
+++++++++++//+your+code+if+myString+is+contained+within+a+String+in+the+List
+++++++}
}|code-block|syntax|javascript|3863063|或|3863064|for(int+i=0;i<myList.length-1;i%2B%2B){
+++++++if(myString.toUpperCase().contains(myList.get(i).toUpperCase())){
+++++++++++//+your+code+if+myString+is+contained+within+a+String+in+the+List
+++++++}
}|3863065|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You can temporarily convert both strings into lowercase or both into uppercase and then do the matching. 

<pre><code>for(int i=0;i&lt;myList.length-1;i++){
 if(myString.toLowerCase().contains(myList.get(i).toLowerCase())){
 // your code if myString is contained within a String in the List
 }
}
</code></pre>

or

<pre><code>for(int i=0;i&lt;myList.length-1;i++){
 if(myString.toUpperCase().contains(myList.get(i).toUpperCase())){
 // your code if myString is contained within a String in the List
 }
}
</code></pre>

I need to check if the user input matches anything in a Set or List, but I am currently using .contains(). Obviously this is not working when the user inputs something that is not the correct case, so I was thinking of using .matches( regex ), but am not a professional regexer.

Would could I use Regex or Pattern to check if the user input matches anything in a List, case aside.

Thank you.

I did just notice that I will have to use a for-loop to get the elements out of my Set before comparing them with .matches().

Java - Ignore case checking user input

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我需要检查用户输入是否与集合或列表中的任何内容匹配，但我目前使用的是.contains()。显然，当用户输入一些不正确的情况时，这是行不通的，所以我考虑使用.matches( regex )，但不是专业的正则表达式。我是否可以使用Regex或模式来检查用户输入是否与列表中的任何内容匹配？谢谢。我注意到，在将元素与.ma...

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