zhzhenqin/java-classic-code: java-classic-code

zhzhenqin 65ad258d98 import code		4 anni fa
..
Event.java	65ad258d98 import code	4 anni fa
MessageConsumer.java	65ad258d98 import code	4 anni fa
MessageProvider.java	65ad258d98 import code	4 anni fa
MessageService.java	65ad258d98 import code	4 anni fa