JSTL fn:indexOf() Function

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The fn:indexOf() function returns the index within a string of a specified substring.

Syntax:

The fn:indexOf() function has following syntax:

int indexOf(java.lang.String, java.lang.String)

Example:

Following is the example to explain the functionality of this function:

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
<html>
<head>
<title>Using JSTL Functions</title>
</head>
<body>

<c:set var="string1" value="This is first String."/>
<c:set var="string2" value="This <abc>is second String.</abc>"/>

<p>Index (1) : ${fn:indexOf(string1, "first")}</p>
<p>Index (2) : ${fn:indexOf(string2, "second")}</p>

</body>
</html>

This would produce following result:

Index (1) : 8
Index (2) : 13


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