Delegates and Events in Managed COBOL
delegate-id MsgArrivedEventHandler.
procedure division using by value msg as string.
end delegate.
class-id a.
01 MsgArrivedEvent type MsgArrivedEventHandler event static.
method-id main static.
*> Combining delegates
set MsgArrivedEvent to MsgArrivedEvent + method My_MsgArrivedEventCallback
invoke run MsgArrivedEvent("Test message")
set MsgArrivedEvent to MsgArrivedEvent - method My_MsgArrivedEventCallback
*> Attaching to an event
attach method My_MsgArrivedEventCallback to MsgArrivedEvent
invoke run MsgArrivedEvent("Test message 2")
end method.
method-id My_MsgArrivedEventCallback static.
procedure division using by value str as string.
display str
end method.
end class.
Delegates and Events in Java
//There is no delegate concept in Java
//The right-side C# program may be mimicked
//with reflection technology.
Portions of these examples were produced by Dr. Frank McCown, Harding University Computer Science Dept, and are licensed under a Creative Commons License.
