[MacPorts] #60205: opendx +java: use Java portgroup

[MacPorts]

#60205: opendx +java: use Java portgroup
--------------------------+--------------------
 Reporter:  chrstphrchvz  |      Owner:  (none)
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:
 Keywords:                |       Port:  opendx
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 It looks like this port should use the Java portgroup, since currently it
 sets the path for javac and variables like JAVA_HOME manually. The Java
 portgroup should handle this as well as allow specifying minimum/exact
 compatible Java version and a fallback version that MacPorts can install
 if a compatible Java isn't already on the system.

 (I personally do not need this port.)

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Ticket URL: <https://trac.macports.org/ticket/60205>
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