StringUtils.lastIndexOf¶

Signature: StringUtils.lastIndexOf(inputString, searchString, startPosition*)

Returns: Integer index - the last index of the searchString or searchChar, -1 if no match or null inputString

Finds the last index within the inputString, handling null. A null inputString will return -1. A negative startPosition returns -1. An empty ("") searchString always matches unless the startPosition is negative. A startPosition greater than the inputString length searches the whole string.

Parameters¶

Type	Name	Description	Default
String	inputString	the String to check, may be null
String or char	searchString	the String or character to find, may be null
Integer	startPosition*	(optional) the start position, negative treated as zero	0

Example¶

// Examples of how to use the StringUtils.lastIndexOf (0 based)
var input = "one two three two one";

// Example: searchString as String
var lastTwo = StringUtils.lastIndexOf(input, "two");              // 14
var lastTwoBefore10 = StringUtils.lastIndexOf(input, "two", 10);  // 4
var notFound = StringUtils.lastIndexOf(input, "xyz");             // -1


// Example: searchString as char
var lastChar = StringUtils.lastIndexOf(input, 'o');               // 18
var lastCharBefore10 = StringUtils.lastIndexOf(input, 'o', 10);   // 6


// Example: empty searchString
var emptySearch = StringUtils.lastIndexOf(input, "");             // 21 (length of string)


// Example: null inputString
var nullResult = StringUtils.lastIndexOf(null, "two");            // -1


// Example: negative startPosition
var negativeStart = StringUtils.lastIndexOf(input, "two", -1);    // -1