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

zhzhenqin 65ad258d98 import code		4 lat temu
..
Event.java	65ad258d98 import code	4 lat temu
MessageConsumer.java	65ad258d98 import code	4 lat temu
MessageProvider.java	65ad258d98 import code	4 lat temu
MessageService.java	65ad258d98 import code	4 lat temu