鍦ㄤ紬澶氱殑璁捐妯″紡涓紝瑙傚療鑰呮ā寮忓彲浠ヨ鏄潪甯歌创杩戞垜浠殑鐢熸椿锛屾垜浠韩涓村叾澧冿紝鎵€浠ヤ篃鏄渶鐔熸倝鐨勩€備负浠€涔堣繖涔堣鍛紝鎴戜滑绮楃暐鐪嬩竴涓嬭瀵熻€呮ā寮忕殑鎻忚堪锛氬畾涔夊璞′箣闂翠竴瀵瑰鐨勪緷璧栧叧绯伙紝褰撲竴涓璞＄殑鐘舵€佸彂鐢熷彉鍖栨椂锛屾墍鏈変緷璧栧畠鐨勫璞￠兘浼氭敹鍒伴€氱煡锛屽苟涓旀槸鑷姩鐨剈pdate瀵瑰唴瀹硅繘琛屽墫鏋愶紝鎴戜滑寰楀埌鍑犱釜鍏抽敭鍐呭锛氫竴瀵瑰瀵硅薄鐘舵€佹敼鍙橈紙鍗冲唴瀹规敼鍙橈級鎵€鏈変緷璧栧璞¤閫氱煡骞惰嚜鍔ㄦ洿鏂扮炕璇戯細鑰佸ぇ缁欏皬寮熷彂鍛戒护锛屼竴鏃﹀懡浠や竴鍙戝嚭锛屼笉灏戝皬寮熺涓€鏃堕棿灏辨敹鍒颁簡鑰佸ぇ鐨勬柊娑堟伅銆傝繖绉嶅叧绯荤殑搴旂敤鍦ㄧ敓娲讳腑涔熼殢澶勫彲瑙侊紝姣斿鏁欏畼瀵瑰＋鍏碉紝鑰佸笀瀵瑰鐢燂紝鍏紬鍙峰璁㈤槄鑰呯瓑绛夛紝鍙儨灏忓紵缁忓父鏈夛紝鑰佹澘鍗存病鏈夈€傛墍浠ヤ互甯堢敓涓轰緥锛屾弿杩颁竴涓嬪叿浣撶殑浠ｇ爜瀹炵幇銆傝璁℃€濊矾鍦ㄨ鍫備笂锛屾暀甯堜綔涓鸿瀛︾敓瑙傚療鐨勪富浣撶殑韬唤鏄疭ubject锛屽鐢熶綔涓鸿瀵熻€呯殑韬唤鏄疧bserver銆傝繖涓や釜瀵瑰簲鐨勬寮忓悕绉伴渶瑕佷簡瑙ｄ竴涓嬨€?.棣栧厛鍒涘缓涓€涓猄ubject锛屽嵆Teacher绫汇€傚湪Teacher绫讳笅鍒涘缓涓€涓泦鍚堬紝鐢ㄦ潵瀛樺偍鍝簺瀛︾敓锛圤bserver锛夊湪鑰佸笀鐨勭彮绾с€傚皢娑堟伅瀹氫箟涓烘暀甯堝皢浼犺揪缁欏鐢熺殑淇℃伅銆俻ublicclassTeacher{privateListstudents=newArrayList();privateStringmessage;}瀹氫箟addStudent鏂规硶锛屽皢閫氳繃鐨勫鐢熶繚瀛樺埌闆嗗悎涓紝鏂逛究鑰佸笀鐭ラ亾鑷繁鐝骇鏈夊摢浜涘鐢焢ublicvoidaddStudent(Studentstu){students.add(stu);}瀹氫箟Get鍜孲et鏂规硶鑾峰彇鍜岃缃秷鎭唴瀹筽ublicStringgetMessage(){returnmessage;}publicvoidsetMessage(Stringmessage){this.message=message;notifyAllStu();}鍦╯etMessage鏂规硶涓紝姣忔Message鏇存柊锛堥噸鏂拌祴鍊硷級锛屾洿鏂板悗鐨勫唴瀹归€氳繃notifyAllStu()鍙戦€佺粰瀛︾敓锛屽鐢熸敹鍒扮殑鍐呭閫氳繃accept()鏂规硶杈撳嚭瀛︾敓鐝€俻rivatevoidnotifyAllStu(){for(Studentstu:students){stu.accept();}}2銆傚畾涔塐bserver锛屼篃灏辨槸Student鎶借薄绫伙紝鍥犱负鏈夊涓鐢燂紝姣忎釜瀛︾敓閮戒笉涓€鏍枫€備簬鏄娊璞″嚭鏉ワ紝鐢熺敓閫氳繃缁ф壙鍏蜂綋鍖栵紝瀹炵幇澶氭€併€傝繖鏍疯€佸笀灏变笉鐢ㄥ叧蹇冩槸鍝釜瀛︾敓浜嗭紝鍙鏄鐢熷氨鍙互鍦ㄨ鍫備笂瀹氫箟Teacher銆傝〃绀哄鐢熼€夋嫨鐨勮€佸笀瀹氫箟浜哸ccept鏂规硶锛岃〃绀哄鐢熸帴鍙楃殑娑堟伅鍐呭銆傚叕鍏辨娊璞＄被瀛︾敓{鍙椾繚鎶ょ殑鑰佸笀鑰佸笀锛沺ublicabstractvoidaccept();}涔嬫墍浠ヤ娇鐢ㄦ娊璞＄被鑰屼笉鏄帴鍙ｏ紝鏄洜涓烘垜浠彲浠ュ湪鎶借薄绫讳腑瀹氫箟灞炴€у拰鏂规硶浣擄紝閫氳繃瀛愮被缁ф壙瀹炵幇璧嬪€煎拰閲嶅啓锛岃€屾帴鍙ｄ笉鑳芥弧瓒虫垜浠璁＄殑瑕佹眰銆傜户鎵縎tudent瀹炵幇閫氳繃鏋勯€犳柟娉曚紶閫掔粰閫変腑鏁欏笀鐨勫叿浣揝tudentA瀵硅薄锛岃皟鐢═eacher.addStudent()灏嗗鐢熸坊鍔犲埌鏁欏笀鐨勭彮绾у垪琛ㄤ腑publicclassStudentAextendsStudent{publicStudentA(TeacherTeacher){this.鑰佸笀=鑰佸笀锛汿eacher.addStudent(杩欎釜);}@Overridepublicvoidaccept(){System.out.println("瀛︾敓A宸茬粡鏀跺埌鑰佸笀鐨勭煡璇嗙偣锛?+this.teacher.getMessage());}}浠ユ绫绘帹锛屾垜浠疄鐜颁簡涓変釜瀛︾敓A銆丅銆丆銆?.缂栧啓娴嬭瘯绫籶ublicclassobserveTest{publicstaticvoidmain(String[]args){TeacherTeacher=newTeacher();StudentAstudentA=newStudentA(鑰佸笀);StudentBstudentB=newStudentB(鑰佸笀);StudentCstudentC=newStudentC(鑰佸笀);System.out.println("鑰佸笀寮€濮嬭绗竴涓煡璇嗙偣浜嗭紒");Teacher.setMessage("1+1=2");System.out.println("鑰佸笀寮€濮嬭绗簩涓煡璇嗙偣浜嗭紒");Teacher.setMessage("2+2=4");System.out.println("瀛︿範缁撴潫锛屼笅璇撅紒锛侊紒");}}杩愯缁撴灉锛氱粨鍚堟祴璇曚唬鐮佸彲浠ョ湅鍑猴紝姣忓綋鑰佸笀鏇存柊娑堟伅鏃讹紝瀛︾敓鍙互鑷姩鎺ユ敹鍒拌€佸笀鏇存柊鐨勫唴瀹癸紝瀹炵幇浜嗘墍璋撶殑锛氫竴瀵瑰锛岀姸鎬佸彉鍖栵紝娑堟伅鏇存柊銆傛垜鏄疕aoo锛岀紪绋嬬晫鐨勬矇鑵撅紝鎷ユ湁涓€棰椾箰瑙傜殑蹇冿紝鍐欏嚭鏈夎叮鐨勬枃绔犮€俓濡傛灉鏈枃瀵规偍鏈夊府鍔╋紝璇锋敹钘忊瓙鍠滄馃憤骞跺叧娉煈€锛屽叧娉ㄤ笉杩疯矾(馃尰鈼♀€库棥)
