<div>
Objects,<br />
<br />
Are you saying that this:<br />
s = s.replaceAll(&quot;[^\w ]&quot;, &quot;&quot;);<br />
<br />
is the same as this:<br />
s = s.replaceAll(&quot;[^A-Za-z0-9 ]&quot;, &quot;&quot;);<br />
<br />
except the former retains underscore as well?<br />
<br />
I was informed that String.replaceAll is not as fast as using the java.util.regex library. Is this true?
</div>


Objects,

Are you saying that this:
s = s.replaceAll("[^\w ]", "");

is the same as this:
s = s.replaceAll("[^A-Za-z0-9 ]", "");

except the former retains underscore as well?

I was informed that String.replaceAll is not as fast as using the java.util.regex library. Is this true?

<div>
&gt; except the former retains underscore as well?<br />
<br />
correct \w matches a-zA-Z_0-9<br />
<br />
&gt;&nbsp;I was informed that String.replaceAll is not as fast as using the java.util.regex library. Is this true?<br />
<br />
doubt it, replaceAll() uses regex library.<br />

</div>


> except the former retains underscore as well?

correct \w matches a-zA-Z_0-9

> I was informed that String.replaceAll is not as fast as using the java.util.regex library. Is this true?

doubt it, replaceAll() uses regex library.


<div>
<div class="content wysiwyg-content">
Hi,<br />
<br />
I'm a dummy when it comes to regex... I need one that retains characters, numbers and spaces.<br />
<br />
It should take performance into consideration.<br />
<br />
Thanks
</div>
</div>


Hi,

I'm a dummy when it comes to regex... I need one that retains characters, numbers and spaces.

It should take performance into consideration.

Thanks

regular expression - retain alpha numeric and spaces

Java is a platform-independent, object-oriented programming language and run-time environment, designed to have as few implementation dependencies as possible such that developers can write one set of code across all platforms using libraries. Most devices will not run Java natively, and require a run-time component to be installed in order to execute a Java program.