Google Collections Library is a suite of new collections and collection-related goodness for Java 5.0

Copy below Google Collections Library maven dependency and paste in your project pom.xml file:

<!-- https://mvnrepository.com/artifact/com.google.collections/google-collections -->
<dependency>
    <groupId>com.google.collections</groupId>
    <artifactId>google-collections</artifactId>
    <version>1.0</version>
</dependency>

Copy below Google Collections Library gradle dependency and paste in your project build.gradle file:

// https://mvnrepository.com/artifact/com.google.collections/google-collections
compile group: 'com.google.collections', name: 'google-collections', version: '1.0'

https://repo1.maven.org/maven2/com/google/collections/google-collections/1.0/google-collections-1.0.jar

https://mvnrepository.com/artifact/com.google.collections/google-collections

https://mvnrepository.com/artifact/com.google.collections/google-collections