Parameter server dictionary lookups in rosjava

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I've got file robot.yaml with massive of parameters

nxt_robot:
  - type: motor
    name: r_wheel_joint
    port: PORT_A
    desired_frequency: 20.0

  - type: motor
    name: l_wheel_joint
    port: PORT_B
    desired_frequency: 20.0

  - type: ultrasonic
    frame_id: ultrasonic_link
    name: ultrasonic_sensor
    port: PORT_2
    spread_angle: 0.2
    min_range: 0.01
    max_range: 2.5
    desired_frequency: 5.0

In Python I read parameters so:

config = rospy.get_param("~nxt_robot")
for c in config:
    rospy.loginfo("Creating %s with name %s on %s",c['type'],c['name'],c['port'])

How to do it in rosjava?