blocks|key|605450|text|我不会把RegEx用在所有东西上。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|605451|for(String+str+:+ar)
{
++++if(!str.toUpperCase().startsWith("KB"))
++++++++System.out.println(str);
}|code-block|syntax|javascript|605452|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|$]]

I wouldn't use RegEx for everything.

<pre><code>for(String str : ar)
{
 if(!str.toUpperCase().startsWith("KB"))
 System.out.println(str);
}
</code></pre>

blocks|key|4361529|text|匹配任何不以KB开头的内容的正则表达式为：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4361530|%5E(?!KB).*|code-block|syntax|javascript|4361531|要在java中执行此操作，请执行以下操作：|4361532|if+(str.matches("%5E(?!KB).*$"))+...|4361533|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|$]]

A regex that matches anything not starting with KB is:

<pre><code>^(?!KB).*
</code></pre>

To do it in java:

<pre><code>if (str.matches("^(?!KB).*$")) ...
</code></pre>

blocks|key|2746068|text|你不应该在任何地方都使用RegExes。只需创建一个简单的检查：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2746069|for+(String+str+:+ar)
{
++++if+(!str.toLowerCase().startsWith("kb"))
++++++++System.out.println(str);
}|code-block|syntax|javascript|2746070|我认为，这种方法在性能上甚至更好(并不是在您的情况下需要性能)：|2746071|public+static+boolean+accept(String+name)
{
++++if+(name.length()+<+2)+return+true;
++++String+sub+=+name.substring(0,+2);
++++return+!sub.equalsIgnoreCase("KB");
}|2746072|其他人对第二种工作方式有什么看法？|2746073|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

You shouldn't use RegExes everywhere. Just create a simple check:

<pre><code>for (String str : ar)
{
 if (!str.toLowerCase().startsWith("kb"))
 System.out.println(str);
}
</code></pre>

And I think, that this method is even better in performace (not that performance is needed in your case):

<pre><code>public static boolean accept(String name)
{
 if (name.length() &lt; 2) return true;
 String sub = name.substring(0, 2);
 return !sub.equalsIgnoreCase("KB");
}
</code></pre>

What do others thing of this second way of working?

blocks|key|2746077|text|++++String[]+ar+=+{"KB_aaa","KB_BBB",+"K_CCC",+"!KBD",+"kb_EEE",+"FFFF"};
++++Pattern+p+=+Pattern.compile("%5EKB.*",+Pattern.CASE_INSENSITIVE);

++++for(String+str+:+ar)
++++{
++++++++Matcher+m+=+p.matcher(str);
++++++++if(!m.matches())
+++++++++++++System.out.println(str);
++++}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2746078|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code> String[] ar = {"KB_aaa","KB_BBB", "K_CCC", "!KBD", "kb_EEE", "FFFF"};
 Pattern p = Pattern.compile("^KB.*", Pattern.CASE_INSENSITIVE);

 for(String str : ar)
 {
 Matcher m = p.matcher(str);
 if(!m.matches())
 System.out.println(str);
 }
</code></pre>

blocks|key|2746223|text|从你的问题的表达方式来看，我不能完全确定你是否希望匹配区分大小写。此正则表达式：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2746224|(?i)[%5Ek][%5Eb].*|code-block|syntax|javascript|2746225|使用标志(?i)关闭区分大小写，并应根据需要进行设置。|2746226|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

From the way your question is worded, I'm not entirely sure whether you want the match to be case insensitive or not. This regex:

<pre><code>(?i)[^k][^b].*
</code></pre>

uses the flag (?i) to turn off case sensitivity, and should do want you want.

blocks|key|4644682|text|使用正则表达式(?i)%5E(?!kb).*进行不区分大小写的匹配。它将避免KB234+Kb*432、kB2343和kb23445。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4644683|entityMap^0|7|D|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|$]]

Use the regex <code>(?i)^(?!kb).*</code> for case insensitive matches. It will avoid KB234 Kb*432, kB2343 and kb23445.

blocks|key|2746306|text|以下是代码片段，可以帮助使用String.matches函数理解忽略大小写，有关更多详细信息，请使用此链接|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2746307|String+stringToSearch+=+"Four+score+and+seven+years+ago+our+fathers+...";

//+this+won't+work+because+the+pattern+is+in+upper-case
System.out.println("Try+1:+"+%2B+stringToSearch.matches(".*SEVEN.*"));

//+the+magic+(?i:X)+syntax+makes+this+search+case-insensitive,+so+it+returns+true
System.out.println("Try+2:+"+%2B+stringToSearch.matches("(?i:.*SEVEN.*)"));|code-block|syntax|javascript|2746308|2746309|尝试1:+false尝试2:真|blockquote|2746310|2746311|2746312|1：http://alvinalexander.com/blog/post/java/java-how-case-insensitive-search-string-matches-method/#:~:text=Solution%253A%2520Use%2520the%2520String%2520matches,must%2520match%2520the%2520entire%2520string.)|offset|length|2746313|entityMap|0|LINK|mutability|MUTABLE|url|http://alvinalexander.com/blog/post/java/java-how-case-insensitive-search-string-matches-method/#:%257E:text=Solution%253A%2520Use%2520the%2520String%2520matches,must%2520match%2520the%2520entire%2520string.^0|0|0|0|0|0|0|2|55|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|10|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|11|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|12|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|13|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|14|8|@]|9|@$O|15|P|16|1|17]]|A|$]]|$1|Q|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

Here is the code snippet that can help for the ignore case understanding with String.matches function, for further details please use this [link][1]
<pre><code>String stringToSearch = &quot;Four score and seven years ago our fathers ...&quot;;

// this won't work because the pattern is in upper-case
System.out.println(&quot;Try 1: &quot; + stringToSearch.matches(&quot;.*SEVEN.*&quot;));

// the magic (?i:X) syntax makes this search case-insensitive, so it returns true
System.out.println(&quot;Try 2: &quot; + stringToSearch.matches(&quot;(?i:.*SEVEN.*)&quot;));
</code></pre>
<blockquote>
<pre><code>Try 1: false
Try 2: true
</code></pre>
</blockquote>
[1]: <a href="http://alvinalexander.com/blog/post/java/java-how-case-insensitive-search-string-matches-method/#:%7E:text=Solution%3A%20Use%20the%20String%20matches,must%20match%20the%20entire%20string." rel="nofollow noreferrer">http://alvinalexander.com/blog/post/java/java-how-case-insensitive-search-string-matches-method/#:~:text=Solution%3A%20Use%20the%20String%20matches,must%20match%20the%20entire%20string.</a>)

I need to match strings in my array which are not starting with "KB" string.
I have tried this

<pre><code>String[] ar = {"KB_aaa","KB_BBB", "K_CCC", "!KBD", "kb_EEE", "FFFF"};
Pattern p = Pattern.compile("[^(^KB)].*");

for(String str : ar)
{
 Matcher m = p.matcher(str);
 if(m.matches())
 System.out.println(str);
}
</code></pre>

But it still not matches "K_CCC".
Thanks

Match strings with regular expression in ignore case

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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我需要匹配数组中不是以"KB“字符串开头的字符串。我已经试过了String[] ar = {"KB_aaa","KB_BBB", "K_CCC", "!KBD", "kb_EEE", "FFFF"};Pattern p = Pattern.compile("[^(^KB)].*");for(String str : a...

问将字符串与忽略大小写的正则表达式匹配
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