What is the StringUtils.lastIndexOfAny method in Java?
Overview
The lastIndexOfAny() method is a StringUtils, which is used to return the last occurring index of any of the character sequences from the given set of the character sequences in the given text. The method returns -1 if none of the character sequences are in the given text.
How to import StringUtils
The definition of StringUtils can be found in the Apache Commons Lang package, which we can add to the Maven project by adding the following dependency to the pom.xml file:
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.12.0</version>
</dependency>
Note: For other versions of the commons-lang package, refer to the Maven Repository.
We can import the StringUtils class as follows:
import org.apache.commons.lang3.StringUtils;
Syntax
public static int lastIndexOfAny(final CharSequence str, final CharSequence... searchStrs)
Parameters
str: The character sequence/string to search in.searchStrs: The list of search sequences.
Return value
This method returns an integer.
Code
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>test</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.12.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>Main</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>Explanation
The Maven dependency for StringUtils is included in the pom.xml file:
Main.java
- Line 1: We import the
StringUtilsclass. - Line 7: We define the
text. - Line 8: The strings to be searched are defined in the string array,
searchStrings. - Line 9: We invoke the
lastIndexOfAnymethod withtextandsearchStringsas parameters. Asedpressois not occurring in thetext, it is ignored while searching. - Lines 11–12: We assign a new array to
searchStrings. InvokinglastIndexOfAnymethod returns-1as none of the elements insearchStringsarray is there intext.
