Java程序設(shè)計 5章_ppt.txt

1、絎簲绔犵被鐨勯噸鐢?瀛︿範(fàn)鐩殑錛?鎺屾彙綾葷殑緇ф壙鍙?qiáng)Object綾?鎺屾彙緇堢粨綾誨強(qiáng)緇堢粨鏂規(guī)硶鎺屾彙鎶借薄綾?鐞嗚В綾葷殑緇勫悎鐔熸?zhèn)夊父鐢ㄥ唴缃?瀛︿範(fàn)閲嶇偣錛?鎺屾彙綾葷殑緇ф壙涓庣粍鍚?鎺屾彙鎶借薄綾誨強(qiáng)鍐呯疆鍖?絎簲绔?綾葷殑閲嶇敤鏈珷鎻愯?錛?綾葷殑緇ф壙鍙?qiáng)Object綾?銆€緇堢粨綾誨強(qiáng)緇堢粨鏂規(guī)硶銆€鎶借薄綾?銆€緇ф壙涓庣粍鍚?銆€甯哥敤鍖?5.1綾葷殑緇ф壙5.1.1緇ф壙鐨勬蹇??緇ф壙鏄敱宸叉湁鐨勭

2、被鍒涘緩鏂扮被鐨勬満鍒訛紝鏄潰鍚戝璞＄▼搴忚璁＄殑閲嶈?鐗瑰緛涔嬩竴銆備竴涓柊綾誨彲浠ヤ粠鐜版湁鐨勭被涓淳鐢燂紝榪欎釜榪囩▼縐頒負(fù)綾葷戶鎵褲€傛淳鐢熷嚭鐨勬柊綾葷О涓哄凡鏈夌被鐨勫瓙綾伙紝宸叉湁綾葷О涓虹埗綾繪垨瓚呯被銆?緇ф壙鎬у緢濂藉湴瑙ｅ喅浜嗚蔣浠剁殑鍙噸鐢ㄦ€ч棶棰樸€傞€氳繃緇ф壙錛屼竴涓被鍙互鐢ㄦ湁宸茬敱綾葷殑鎵€鏈夊姛鑳姐€傚洜姝わ紝鍙渶鎸囨槑鏂扮被涓庣幇鏈夌被鐨勪笉鍚岋紝鍗沖?鍔犺嚜宸辯殑灞炴€у拰鏂

3、規(guī)硶鍗沖彲銆?java瑕佹眰姣忎釜綾婚兘鏈夌埗綾伙紝褰撴病鏈夋樉寮忕戶鎵跨埗綾繪椂錛岀埗綾婚殣鍚負(fù)?dān)鮦ava.long鍖呬腑鐨刼bject綾匯€備竴涓埗綾誨彲浠ュ悓鏃舵嫢鏈夊?涓瓙綾伙紝姝ゆ椂榪欎釜鐖剁被瀹為檯涓婃椂鎵€鏈夊瓙綾葷殑鍏辨湁灞炴€у嵆鏂規(guī)硶鐨?闆嗗悎錛岃€屾瘡涓€涓瓙綾誨垯鏄埗綾葷殑鐗規(guī)畩鍖栵紝鏄湪鍏叡灞炴€х殑鍩虹涓婄殑鍔熻兘鍙?婂睘鎬х殑鎵╁睍鍜屽歡浼搞€?java涓嶆敮鎸佺被鐨勫閲嶇戶鎵匡紝鍙敮鎸佸彲鐨

4、勫崟緇?ф壙錛屽嵆姣忎釜瀛愮被鍙兘鏈変竴涓洿鎺ョ埗綾伙紝綾葷殑灞傛緇撴瀯涓烘爲(wèi)鐘剁粨鏋勶紝object綾諱負(fù)鏍?wèi)鐨勬牴鑺傜倧V€?鐗瑰埆瑕佹敞鎰忕殑鏄細(xì)閫氬父鏍規(guī)嵁搴旂敤瀹氫箟鑷繁鐨勭被灞傛錛屽湪瀹氫箟綾葷殑灞傛緇撴瀯涓紝鐖剁被涓庡瓙綾葷殑鍏崇郴鏄竴鑸簬鐗規(guī)畩鐨勫叧緋伙紝鑰屼笉鏄暣浣撲笌閮ㄥ垎鐨勫叧緋伙紝濡傚浘51銆?2鎵€紺恒€?鍥?1綾誨眰嬈＄粨鏋勫浘涓句緥鍥?2閿欒鐨勭被灞傛緇撴瀯鍥?涓庡閲嶇戶鎵匡紙鐩稿簲

5、鐨勭被緇撴瀯涓虹綉鐘剁粨鏋勶級鐩告瘮錛屽崟緇?ф壙姣旇緝綆€鍗曪紝鎺屾彙銆佹帶鍒惰搗鏉ョ浉瀵瑰鏄撱€侸ava铏界劧鍙敮鎸佸崟緇ф壙錛屼絾鍙€氳繃鎺ュ彛鏉ュ疄鐜板?緇ф壙鍔熻兘銆?閲囩敤緇ф壙鐨勬満鍒舵潵緇勭粐銆佽璁＄郴緇熺殑綾伙紝鍙互鎻愰珮紼嬪簭鐨勬娊璞＄▼搴︼紝浣夸箣鏇存帴榪戜簬浜虹被鐨勬€濈淮鏂瑰紡錛涢噰鐢ㄧ戶鎵胯繕鍙互浣跨紪鍐欑殑紼嬪簭緇撴瀯娓呮櫚錛岃妭鐪佷簡緙栫▼鏃墮棿錛涘悓鏃跺洜涓轟唬鐮佺殑緙栧啓閲忓噺灝戯紝涔熼檷

6、浣庝簡紼嬪簭緇存姢鐨勫伐浣滈噺銆?5.1.2緇ф壙鐨勮娉?鍦╦ava璇█涓紝瀛愮被瀵圭埗綾葷殑緇ф壙鏄湪綾葷殑澹版槑璇彞涓疄鐜扮殑銆傚墠闈㈡彁鍒扮被澹版槑璇彞濡備笅錛?[綾諱慨楗扮]class綾誨悕[extends鐖剁被鍚峕[implements[錛屾帴鍙ｅ悕]綾諱綋鍏朵腑錛屽叧閿瓧extends璇存槑浜嗘澶勫畾涔夌殑鈥滅被鍚嶁€濈戶鎵夸簡鈥滅埗綾誨悕鈥濇寚瀹氱殑綾諱腑鐨勫睘鎬у拰琛屼負(fù)銆?渚?.1錛氳璁′漢鍛樼被銆

7、?瀛愮被錛?publicclassManagerextendsEmployee鎴愬憳鍙橀噺Stringlist鏂規(guī)硶鐣?姝ゆ椂濡傛灉鍦ㄥ彟涓€涓被涓垱寤篗anager綾葷殑瀹炰緥銆?瀛愮被瀹炰緥搴旂敤錛?publicclassJerrypublicstaticvoidmain(Stringargs[])Managerjerry=newManager()鍒涘緩Manager瀹炰緥鍥犱負(fù)Manager緇ф壙鑷猠mployee錛屾墍浠?

8、anager綾諱腑鍖呭惈緇ф壙鏉ョ殑task灞炴€т互鍙?qiáng)鍏卞厷匊鷊etTask鏂規(guī)硶銆俲erry浣滀負(fù)綾葷殑瀹炰緥錛屼篃灝卞彲浠ヨ闂浉搴旂殑灞炴€у拰鏂規(guī)硶jerry.task=“綆＄悊鍛樺伐“System.out.println(“jerry鐨勫伐浣滄槸錛?jerry.getTask())鎵ц?緇撴灉錛欽erry鐨勫伐浣滄槸錛氱鐞嗗憳宸ャ€?聽2.銆€淇濇姢錛坧rotected錛夊強(qiáng)鍙嬪ソ鎴愬憳鐨勭戶鎵?濡傛灉鎶婁笂渚嬩腑鐨勭

9、埗綾葷殑灞炴€у拰鏂規(guī)硶閮界敤protected淇グ錛屽嵆濡備笅瀹氫箟錛?publicclassEmployee鎴愬憳鍙橀噺intidprotectedStringnamephonetask淇濇姢綾誨瀷鍙橀噺protectedStringgetTask()鎴愬憳鏂規(guī)硶returntask姝ゆ椂榪欐牱鐨勬敼鍙樺紼嬪簭Jerry.java鐨勬墽琛屾病鏈変換浣曞獎鍝嶏紝鍥犱負(fù)protected綾誨瀷鎴愬憳鍙互琚獷mployee綾繪墍鍦ㄥ

10、悓涓€涓寘涓殑鎵€鏈夌被鍙?qiáng)鍏朵粬鍖呬笟勫瓙绫昏畨K棶鎴栫戶鎵匡紝鑰屾澶勫畾涔夌殑綾婚兘鍦ㄥ綋鍓嶅寘涓紝鍗沖湪鍚屼竴涓寘涓€?鍙﹀錛岀粏蹇冪殑璇昏€呭彲鑳戒細(xì)鍙戠幇錛屽湪渚??.2涓櫧鐒舵柟娉曡?澹版槑涓簆ublic錛屼絾鍙橀噺task鏄病鏈変慨楗扮鐨勶紝鍗硉ask絳夊睘鎬т負(fù)榛樿鐨?鍙嬪ソ鎴愬憳鍙橀噺錛屼絾瀛愮被鍚屾牱鑳藉璁塊棶鍒般€傝繖鏄洜涓烘綾誨彉閲忔垨鏂規(guī)硶鍙互琚?悓涓€涓寘涓殑鍏朵粬綾繪墍璁塊棶錛屽浜

11、嶦mployee綾繪潵璇達(dá)紝鍚屼竴涓寘涓殑鎵€鏈夌被褰撶劧涔熷寘鎷瓙綾籑anager銆傝鑰呭彲浠ヨ嚜琛岄獙璇併€?3.銆€縐佹湁鎴愬憳鐨勭戶鎵褲€?渚?.3錛氬悓鏍風(fēng)殑瀛愮被鍜屽瓙綾誨疄渚嬶紝鍙?qiáng)婄埗绫基鮁mployee涓殑灞炴€у嵆鏂規(guī)硶璇ヤ負(fù)private淇グ銆?publicclassEmployee鎴愬憳鍙橀噺intidprivateStringnamephonetask縐佹湁鍙橀噺privateStringg