This interface does not strictly define what happens when the priority of an object is changed. An implementation of this interface is free to define the side-effects of changing the priority of an object. In some cases, changing the priority of an object may be disallowed (resulting in an exception being thrown) or may simply be ignored.
The object's priority. It can be modified to change the priority of the object. Typical priority values are defined in the idl file as PRIORITY_HIGHEST ... PRIORITY_LOWEST. The implementation is free to truncate a given priority value to whatever limits are appropriate. Typically this attribute is initialized to PRIORITY_NORMAL, but implementations may choose to assign a different initial value.
The highest priority.
Higher than normal priority.
The default priority.
Lower than normal priority.
The lowest priority.
This method adjusts the priority attribute by a given amount (delta).
in long delta
The amount by which to adjust the priority attribute.