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❮ Jstl Core Remove Tag Jstl Xml Parse Tag ❯

fn:indexOf() Function

JSP Standard Tag Library

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

Syntax

The syntax for the fn:indexOf() function is as follows:

${fn:indexOf(&lt;original string>, <substring>)}

Example Demonstration

The following example demonstrates the functionality of this function:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ 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>

&lt;c:set var="string1" value="This is first String."/>
&lt;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>

The output is as follows:

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

JSP Standard Tag Library

❮ Jstl Core Remove Tag Jstl Xml Parse Tag ❯