<dependency>
  <groupId>maven</groupId>
  <artifactId>maven-jar-plugin</artifactId>
  <version>1.8</version>
</dependency>

implementation 'maven:maven-jar-plugin:1.8'

implementation("maven:maven-jar-plugin:1.8")

libraryDependencies += "maven" % "maven-jar-plugin" % "1.8"

@Grapes(
  @Grab(group='maven', module='maven-jar-plugin', version='1.8')
)

<dependency org="maven" name="maven-jar-plugin" rev="1.8" />

[maven/maven-jar-plugin "1.8"]

'maven:maven-jar-plugin:jar:1.8'