You can have both Lang2 and Lang3 in your classpath. Due to incompatibility of Lang2 and Lang3, the package is intentionally changed from org.apache.commons.lang to org.apache.commons.lang3 so that you can have both version in classpath without conflict
Maven Repository
mvnrepository.com › artifact › commons-lang › commons-lang › 2.6
Maven Repository: commons-lang » commons-lang » 2.6
January 16, 2011 - Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang.
Published Jan 16, 2011
Version 2.6
Apache Commons
commons.apache.org › lang
Home – Apache Commons Lang
The standard Java libraries fail to provide enough methods for manipulation of its core classes. Apache Commons Lang provides these extra methods · Apache Commons Lang provides a host of helper utilities for the java.lang API, notably String manipulation methods, basic numerical methods, object ...
GitHub
github.com › apache › commons-lang
GitHub - apache/commons-lang: Apache Commons Lang · GitHub
Apache Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang.
Author apache
Top answer 1 of 3
1
The base package of Apache Commons Lang 3 is not org.apache.commons.lang anymore.
Provided that the error occurs in your own code, you have to replace it with the org.apache.commons.lang3 package .
If it occurs in external libraries, either upgrade them to a version that uses Lang 3 (if it is possible), or you may have to also keep your older commons lang among the dependencies (as explained in the answer by Karol, the distinct packages will prevent possible conflicts anyway).
e.g :
org.apache.commons.lang.StringUtils in Lang 2.6
vs
org.apache.commons.lang3.StringUtils in Lang 3
2 of 3
1
commons-lang3 is using org.apache.commons.lang3 base package to avoid conflicts with previous versions of commons-lang. This allows both 2.X and 3.X to be used at the same time.
To update to 3.X uou have to change the import in your code e.g. use
import org.apache.commons.lang3.StringUtils;
Apache Commons
commons.apache.org › lang › download_lang.cgi
Download Apache Commons Lang – Apache Commons Lang
We recommend you use a mirror to download our release builds, but you must verify the integrity of the downloaded files using signatures downloaded from our main distribution directories. Recent releases (48 hours) may not yet be available from all the mirrors · You are currently using ...
Javadoc.io
javadoc.io › doc › commons-lang › commons-lang › latest › index.html
commons-lang 2.6 javadoc (commons-lang)
Bookmarks · Latest version of commons-lang:commons-lang · https://javadoc.io/doc/commons-lang/commons-lang · Current version 2.6 · https://javadoc.io/doc/commons-lang/commons-lang/2.6 · package-list path (used for javadoc generation -link option) · https://javadoc.io/doc/commons-lang...
Maven Central
central.sonatype.com › artifact › commons-lang › commons-lang › 2.6
commons-lang:commons-lang:2.6 - Maven Central
commons-lang · pkg:maven/commons-lang/commons-lang@Loading · Used in: · components · Overview · Versions · Dependents
Maven Central
repo1.maven.org › maven2 › commons-lang › commons-lang › 2.6 › commons-lang-2.6.pom
https://repo1.maven.org/maven2/commons-lang/ ...
Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang.
Maven Central
central.sonatype.com › artifact › commons-lang › commons-lang › 2.1
commons-lang:commons-lang:2.1 - Maven Central
<project> <modelVersion>4.0.0</modelVersion> <groupId>commons-lang</groupId> <artifactId>commons-lang</artifactId> <name>Lang</name> <version>2.1</version> <description>Commons.Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be ...
Apache Commons
commons.apache.org › proper › commons-lang › article2_4.html
What's new in Commons Lang 2.4? – Apache Commons Lang
Commons Lang 2.4 is out, and the obvious question is: "So what? What's changed?" · This article aims to briefly cover the changes and save you from having to dig through each JIRA issue to see what went on in the year of development between Lang 2.3 and 2.4
Maven Repository
mvnrepository.com › artifact › commons-lang › commons-lang
Maven Repository: commons-lang » commons-lang
January 16, 2011 - Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to · Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang ...
GitHub
github.com › njawalkar › apache-commons-lang2
GitHub - njawalkar/apache-commons-lang2: Apache's commons-lang2 v2.6 with a backported fix for CVE-2025-48924
Apache's commons-lang2 v2.6 with a backported fix for CVE-2025-48924 - njawalkar/apache-commons-lang2
Author njawalkar
Maven Repository
mvnrepository.com › artifact › commons-lang › commons-lang › 2.0
Maven Repository: commons-lang » commons-lang » 2.0
Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang.
Apache Commons
commons.apache.org › proper › commons-lang › upgradeto2_3.html
2.3 Release Notes – Apache Commons Lang
These are the release notes and advice for upgrading Commons-Lang from version 2.2 to version 2.3 · Copyright © 2001-2025 The Apache Software Foundation. All Rights Reserved
SmartClient Forums
forums.smartclient.com › forum › technical-q-a › 276121-critical-commons-lang2-6-to-commons-lang3-migration-dependency-conflict-with-smartclient-framework
Critical: commons-lang2.6 to commons-lang3 Migration - Dependency Conflict with SmartClient Framework - SmartClient Forums
SmartClient 12.0 requires commons-lang2.6 and is not vulnerable to any of the CVEs related to commons-lang. So the remedy is to put the .jar back - you weren't vulnerable in the first place.
Maven Repository
mvnrepository.com › artifact › org.apache.commons › commons-lang3
Maven Repository: org.apache.commons » commons-lang3
November 12, 2025 - Apache Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang. The code is tested using the latest revision of the JDK for supported LTS releases: 8, 11, 17, 21 and 25 currently ...
Maven Repository
mvnrepository.com › artifact › org.apache.commons › commons-lang › 2.6
Maven Repository: org.apache.commons » commons-lang » 2.6
November 10, 2017 - Apache Commons is an Apache project focused on all aspects of reusable Java components.
Published Nov 10, 2017
Version 2.6
Apache Commons
commons.apache.org › proper › commons-lang › javadocs › api-2.6 › overview-summary.html
Overview (Commons Lang 2.6 API)
Overview Package Class Use Tree Deprecated Index Help PREV NEXT FRAMES NO FRAMES <A HREF="allclasses-noframe.html"><B>All Classes</B></A> Copyright © 2001-2011 The Apache Software Foundation. All Rights Reserved
Jarcasting
jarcasting.com › artifacts › commons-lang › commons-lang › 2.6
commons-lang » commons-lang » 2.6 - jar download | JarCasting
@Grapes( @Grab(group='commons-lang', module='commons-lang', version='2.6') ) Scala SBT