<dependency>
  <groupId>jfree</groupId>
  <artifactId>jfreechart</artifactId>
  <version>0.9.21</version>
</dependency>

implementation 'jfree:jfreechart:0.9.21'

implementation("jfree:jfreechart:0.9.21")

libraryDependencies += "jfree" % "jfreechart" % "0.9.21"

@Grapes(
  @Grab(group='jfree', module='jfreechart', version='0.9.21')
)

<dependency org="jfree" name="jfreechart" rev="0.9.21" />

[jfree/jfreechart "0.9.21"]

'jfree:jfreechart:jar:0.9.21'