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04 java實現發布訂閱模式(誰能介紹一下JAVA平臺開發中最長用的幾種設計模式~最好是通俗一些的并且有實例的~500分酬謝)
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简介_imple(carer_subject_parent carer_subject_parent_ref) {  
新建客戶端運行類
package run_main;import carer_observer carer_observer_imple;import carer_subject carer_subject_parent;import carer_subject carer_subject_sub;public class run_main { public static void main(String[] args) { carer_subject_parent carer_subject_parent_ref = new carer_subject_sub(); carer_observer_imple carer_observer_imple_ref = new carer_observer_imple( carer_subject_parent_ref); carer_observer_imple carer_observer_imple_ref = new carer_observer_imple( carer_subject_parent_ref); carer_observer_imple carer_observer_imple_ref = new carer_observer_imple( carer_subject_parent_ref); carer_observer_imple carer_observer_imple_ref = new carer_observer_imple( carer_subject_parent_ref); carer_subject_parent_ref add_observer(carer_observer_imple_ref ); carer_subject_parent_ref add_observer(carer_observer_imple_ref ); carer_subject_parent_ref add_observer(carer_observer_imple_ref ); carer_subject_parent_ref add_observer(carer_observer_imple_ref ); carer_subject_parent_ref sub_observer(carer_observer_imple_ref ); carer_subject_parent_ref set_state( 到達終點 ); carer_subject_parent_ref notityAllCarer(); }}
程序運行結果如下
到達終點到達終點到達終點
以一對多的方式進行對一方狀態的改變而去通知多方 觀察者模式也叫發布/訂閱模式 一方進行發布 而多方進行訂閱 和生活中看報紙一樣 你喜歡訂城市晚報 就會發給你
【 觀察者 模式 MyEclipse 項目JAVA代碼實現】
lishixin/Article/program/Java/gj/201311/27277
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