<div dir="ltr" style="text-align: left;" trbidi="on">
<div dir="ltr" style="text-align: left;" trbidi="on">JSTL Join function is used to concatenate the strings contained in an array with the specified string.</p>
<p> &#8220;fn:join&#8221; is a string function of JSP Standard Tag Library(JSTL). This function is used to return string with all the elements of an array separated by a &#8220;separator&#8221;.</p>
<p> The <i><b>fn:join()</b></i> function concatenates all the elements of an array into a string with a specified separator.</p>
<p> <i><b>Syntax:</b></i><br />
The <i><b>fn:join()</b></i> function has following syntax:</p>
<pre class="highlight" name="code">String join (java.lang.String[], java.lang.String)
</pre>
<p>
<b>JST Join Function Example-</b></p>
<pre class="highlight" name="code"><;!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd">;
<;html>;
<;head>;
<;meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">;
<;title>;JSTL Join Function Example<;/title>;
<;/head>;
<;body>;
 <;c:set var="array1" value="${fn:split('I am a good programmer in java', ' ')}">;
 <;c:out value="${fn:join(array1, '-')}">;<;/c:out>;
<;/body>;
<;/html>;
</pre>
<p>
<b>Output: I-am-a-good-programmer-in-java</b></p>
<p>As you can see above, fn:join() takes an array of String as input parameters and returns the result of concatenation of strings with another string specified as 2nd parameter in JSTL join function.</p></div>
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