<dependency>
  <groupId>net.sf.rubycollect4j</groupId>
  <artifactId>rubycollect4j</artifactId>
  <version>2.1.2</version>
</dependency>

implementation 'net.sf.rubycollect4j:rubycollect4j:2.1.2'

implementation("net.sf.rubycollect4j:rubycollect4j:2.1.2")

libraryDependencies += "net.sf.rubycollect4j" % "rubycollect4j" % "2.1.2"

@Grapes(
  @Grab(group='net.sf.rubycollect4j', module='rubycollect4j', version='2.1.2')
)

<dependency org="net.sf.rubycollect4j" name="rubycollect4j" rev="2.1.2" />

[net.sf.rubycollect4j/rubycollect4j "2.1.2"]

'net.sf.rubycollect4j:rubycollect4j:jar:2.1.2'