Java程序設(shè)計(jì) 6章_ppt.txt

1、絎叚绔犳帴鍙ｄ笌澶氭€?瀛︿範(fàn)鐩殑錛?鎺屾彙鎺ュ彛鐨勫垱寤轟笌瀹炵幇鐞嗚В濉戝瀷鎺屾彙澶氭€侊紝浜嗚В鍔ㄦ€佺粦瀹?鐞嗚В澶氭€佷笌鏋勯€犳柟娉?浜嗚В鍐呴儴綾?瀛︿範(fàn)閲嶇偣錛?鎺ュ彛鐨勫垱寤轟笌瀹炵幇澶氭€?絎叚绔?鎺ュ彛涓庡?鎬?鏈珷鎻愯?錛?銆€鎺ュ彛銆€濉戝瀷銆€澶氭€?銆€澶氭€佷笌鏋勯€犳柟娉?鍐呴儴綾?6.1鎺ュ彛6.1.1鎺ュ彛鐨勪綔鐢ㄥ強(qiáng)璇硶1.銆€鎺ュ彛鐨勪綔鐢?java鐨勬帴鍙ｄ篃鏄潰鍚戝璞＄殑涓€涓噸瑕

2、佹満鍒躲€傚畠鐨勫紩榪涙槸涓轟簡瀹炵幇澶氱戶鎵匡紝鍚屾椂鍏嶉櫎C涓殑澶氱戶鎵塊偅鏍風(fēng)殑澶嶆潅鎬с€傛帴鍙ｄ腑鐨勬墍鏈夋柟娉曢兘鏄娊璞＄殑錛岃繖浜涙娊璞℃硶鐢卞疄鐜拌繖涓€鎺ュ彛鐨勪笉鍚岀被鏉ュ叿浣撳畬鎴愩€傚湪浣跨敤涓紝鎺ュ彛綾葷殑鍙橀噺鍙互鐢ㄦ潵浠ｈ〃浠諱綍瀹炵幇浜嗚鎺ュ彛鐨勭被鐨勫璞★紝榪欏氨鐩稿綋浜庢妸綾繪牴鎹叾瀹炵幇鐨勫姛鑳芥潵鍒嗗埆浠ｈ〃錛?鎺ュ彛錛坕nterface錛夋槸鎶借薄鐨勬蹇佃兘娣卞叆浜嗕竴灞傘€

3、傚彲灝嗗叾鎯寵薄涓轟竴涓€滅函鈥?濇娊璞＄被銆傚畠鍏佽鍒涘緩鑰呰?瀹氫竴涓被鐨勫熀鏈艦寮忥細(xì)鏂規(guī)硶鐨勫悕縐般€佸弬鏁板垪琛ㄣ€佽繑鍥炵被鍨嬶紝浣嗕笉鑳借瀹氭柟娉曚富浣撱€傛帴鍙ｄ篃鍖呭惈浜嗘暟鎹垚鍛橈紝浣嗗畠浠兘榛?樿涓簊tatic鍜宖inal銆傛帴鍙ｅ彧鎻愪緵涓€縐嶅艦寮忥紝騫朵笉鎻愪緵瀹炴柦鐨勭粏鑺傘€?鑰屼笉蹇呴【铏戝畠鎵€鍦ㄧ殑綾葷戶鎵垮眰嬈€傝繖鏍峰彲浠ユ渶澶ч檺搴﹀湴鍒╃敤鍔ㄦ€佺粦瀹氾紝闅愯棌瀹炵幇緇嗚妭銆傛

4、帴鍙ｈ繕鍙互鐢ㄦ潵瀹炵幇涓嶅悓綾諱箣闂寸殑甯擱噺鍏變韓銆?浜轟滑甯鎬嬌鐢ㄦ帴鍙ｆ潵寤虹珛綾誨拰綾諱箣闂寸殑鈥滃崗璁€濄€傛湁浜涢潰鍚戝璞＄殑紼嬪簭璁捐璇█閲囩敤浜嗗悕涓衡€減rotocol鈥濓紙鍗忚錛夌殑鍏抽敭瀛楋紝瀹冨仛鐨勪究鏄笌鎺ュ彛鐩稿悓鐨勪簨鎯呫€?渚?.1錛氭帴鍙ｄ婦渚嬨€?淇濋櫓鍏徃鍏鋒湁杞﹁締淇濋櫓銆佷漢鍛樹繚闄┿€佸叕鍙鎬繚闄╃瓑寰堝?淇濋櫓涓氬姟錛岃繖浜涗繚闄╀笟鍔＄殑淇濋櫓瀵硅薄涓嶅悓錛屼絾鍦ㄥ澶栨彁

5、渚涙湇鍔℃柟闈㈠叿鏈夌浉浼兼€э紝濡傞兘闇€瑕佽綆椾繚闄╄垂錛坧remium錛夌瓑錛屽洜姝ゅ彲浠ュ０鏄庝竴涓狪nsurable鎺ュ彛錛屾帴鍙ｄ腑鍖呭惈璁＄畻淇濋櫓璐規(guī)墍闇€瑕佺殑鏂規(guī)硶錛屽茍浣跨敤涓嶅悓鐨勭被濡傝濺杈嗙被銆佷漢鍛樼被絳夊垎鍒疄鐜拌繖涓帴鍙ｃ€?鎬誨湴鏉ヨ錛屾帴鍙ｆ湰璐ㄤ笂鏄竴縐嶇壒孌婄殑鎶借薄綾伙紝鐩殑鏄敤鏉ュ疄鐜板?緇ф壙銆傛帴鍙ｄ笌鎶借薄綾婚兘鏄０鏄庡?涓被鐨勫叡鍚屽睘鎬с€備絾鎺ュ彛涓庢娊璞＄被

6、涓嶅悓鐨勬槸錛氭帴鍙ｅ厑璁稿湪鐪嬭搗鏉ヤ笉鐩稿共鐨勭被涔嬮棿瀹氫箟鍏卞悓琛屼負(fù)銆?2.銆€鎺ュ彛鐨勮娉?浣跨敤鍏抽敭瀛梚nterface鏉ュ０鏄庢帴鍙ｃ€侸ava鎺ュ彛涓彧鏈夋柟娉曠殑澹版槑錛岃€屾病鏈夌洿鎺ュ畾涔夋柟娉曠殑鍐呭銆傚畠鐨勫０鏄庢牸寮忎負(fù)錛?[鎺ュ彛淇グ絎?interface鎺ュ彛鍚嶇О[extends鐖剁被鍚峕鈥?鏂規(guī)硶鐨勫０鏄庢垨闈欐€佸父閲?鎺ュ彛涓庝竴鑸被鐨勫０鏄庡熀鏈竴鏍鳳紝鏈韓涔熷叿鏈夋暟鎹垚鍛樹笌鏂規(guī)

7、硶錛屼絾鏁版嵁鎴愬憳涓€瀹氳璧嬪垵鍊鹼紝涓旀鍊煎皢涓嶈兘鍐嶆洿鏀癸紝鍗充負(fù)?final甯擱噺錛岃€屾柟娉曞繀欏諱負(fù)鈥滄娊璞℃柟娉曗€濓紝鐢卞墠闈?.4.2鑺備腑鐨勬娊璞℃柟娉曠煡錛屾娊璞℃柟娉曞繀欏昏淇グ涓簆?ublicabstract錛屼笉榪囧湪鎺ュ彛涓垚鍛樻暟鎹墠鐨刦inal鍏抽敭瀛椼€佹柟娉曠殑public鍏抽doublerpublicCircle(doubler)this.r=rpublicdoublegetAr

8、ea()瀹炵幇鎶借薄鏂規(guī)硶r(shí)eturn(pirr)classRectangleimplementsShape2DdoublewhpublicRectangle(doublewidthdoubleheight)w=widthh=heightpublicdoublegetArea()瀹炵幇鎶借薄鏂規(guī)硶r(shí)eturn(wh)嫻嬭瘯綾誨０鏄庡涓嬶細(xì)?publicclassInterface_testpublicstaticvoidmain(Str

9、ingargs[])Circleovel=newCircle(2.0)System.out.println(“鍦唎vel鐨勯潰縐負(fù)?jù)皁vel.getArea())Rectanglerect=newRectangle(2.03.0)System.out.println(“鐭╁艦rect鐨勯潰縐負(fù)?jù)皉ect.getArea())榪愯姝ラ錛??javacShape2D.javajavacInterface_test.javajavaIn

10、terface_test榪愯鏄劇ず緇撴灉錛??鍦唎vel鐨勯潰縐負(fù)?jù)?2.56鐭╁艦rect鐨勯潰縐負(fù)?jù)?.0鐢辨湰渚嬪彲浠ョ湅鍑猴紝閫氳繃鎺ュ彛浠ュ強(qiáng)瀹炵幇鎺ュ彛鐨勭被錛屽彲浠ョ紪鍐欏嚭璺熺畝媧佺殑紼嬪簭浠ｇ爜銆?6.1.3聽聽鍒╃敤鎺ュ彛瀹炵幇綾葷殑澶氶噸緇ф壙鏈夋椂鍊欙紝浜轟滑浼?xì)甯屾湜涓€涓瓙綾誨悓鏃剁戶鎵胯嚜涓や釜浠ヤ笂鐨勭埗綾伙紝浠ヤ究浣跨敤姣忎竴涓埗綾葷殑鍔熻兘錛屼絾java騫朵笉鍏佽澶氫釜鐖剁被鐨勭戶鎵匡紝鍏朵腑鐨勫師

11、鍥犲緢綆€鍗曪紝鍥爅ava鐨勮璁℃槸浠ョ畝鍗曞疄鐢ㄤ負(fù)瀵煎悜錛岃€屽埄鐢ㄧ被鐨勫?閲嶇戶鎵垮皢浣垮緱闂?澶嶆潅鍖栵紝榪欎笌java璁捐鐨勫師鎰忕浉榪濊儗銆?铏界劧java涓嶅厑璁鎬竴涓被鏈夊?涓埗綾伙紝浣嗗厑璁鎬竴涓被鍙互瀹炵幇澶氫釜鎺ュ彛錛岄€氳繃榪欑鏈哄埗鍙互瀹炵幇澶氶噸緇?ф壙銆?涓€涓被瀹炵幇澶氫釜緇ф壙鐨勬柟娉曞緢綆€鍗曪紝鍙?灝嗘帴鍙ｅ悕鏀懼湪implements鍚庨潰錛屾帴鍙ｅ悕浠ラ€楀彿闅斿紑鍗沖彲