For manual downloads without a build tool, Maven Central is the industry standard. Search for commons-collections . Select the version you need.
The safest source is the official Apache Commons project page.
Once the JAR is added to your classpath, you can use the class as follows: For manual downloads without a build tool, Maven
Standard Java HashMap implementations do not guarantee any specific order. While LinkedHashMap is available in the standard JDK, ListOrderedMap provides a decorator pattern that allows you to wrap any existing Map to make it ordered.
If you are working on a Java project and need to maintain the insertion order of elements in a Map, you likely need the ListOrderedMap class from the Apache Commons Collections library. The safest source is the official Apache Commons
: Allows access to values via an integer index, similar to a List. Where to Download the JAR
Adding the dependency to your pom.xml is the recommended way to handle the download automatically. If you are working on a Java project
implementation 'commons-collections:commons-collections:3.2.2' Use code with caution. Quick Code Example