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How to check index within a string of a specified substring in JSP?
The fn:indexOf() function returns the index within a string of a specified substring.
Syntax
The fn:indexOf() function has the following syntax −
int indexOf(java.lang.String, java.lang.String)
Example
Following is the example to explain the functionality of the fn:indexOf() 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>You will receive the following result −
Index (1) : 8 Index (2) : 13
Updated on: 30-Jul-2019
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