銆銆闈㈠悜榪囩▼璁捐鍜岄潰鍚戝璞¤璁$殑涓昏鍖哄埆鏄細鏄惁鍦ㄤ笟鍔¢昏緫灞備嬌鐢ㄥ啑闀跨殑if else鍒ゆ柇銆傚鏋滀綘榪樺湪澶ч噺浣跨敤if else錛屽綋鐒訛紝鐣岄潰琛ㄧ幇灞傞櫎澶栵紝鍗充嬌浣犱嬌鐢↗ava/C#榪欐牱瀹屽叏闈㈠悜瀵硅薄鐨勮璦錛屼篃鍙兘璇存槑浣犵殑鎬濈淮鍋滅暀鍦ㄤ紶緇熺殑闈㈠悜榪囩▼璇█涓娿?/p>
浼犵粺鎬濈淮涔犳儻鍒嗘瀽
銆銆涓轟粈涔堜細涓氬姟閫昏緫灞備嬌鐢╥f else錛屽叾瀹炰嬌鐢ㄨ呯殑鐩殑涔熸槸涓轟簡閲嶇敤錛屼絾鏄繖鏄潰鍚戣繃紼嬬紪紼嬬殑閲嶇敤錛岀▼搴忓憳鍙湅鍒頒唬鐮侀噸鐢紝鍥犱負浠栫湅鍒癷f else鍑犵鎯呭喌涓嬪ぇ閮ㄥ垎浠g爜閮芥槸閲嶅鐨勶紝鍙湁涓埆涓嶅悓錛屽洜姝や嬌鐢╥f else鍙互閬垮厤閲嶅浠g爜錛屽茍涓旇涓鴻繖鏄ā鏉縏emplate妯″紡銆?/p>
銆銆浠栬寖鐨勯敊璇槸錛氱▼搴忓憳鍙粠浠g爜榪愯欏哄簭榪欎釜鏂瑰悜鏉ョ湅寰呭畠鐨勪唬鐮侊紝榪欑鎬濈淮綾諱技姘寸鎴栦覆琛岀數璺紝姘存部鐫姘寸嫻佸姩錛堜唬鐮佽繍琛屾搴忥級錛屽綋閬囧埌鍑犱釜鍒嗙錛堝瓙綆★級錛屽氨鍒嗗埌榪欏嚑涓垎綆″瓙鍦ㄦ祦鍔紝榪欓噷灝辯浉褰撲簬紕板埌浠g爜鐨刬f else澶勪簡銆?/p>
銆銆鑰屼嬌鐢∣O錛屽垯棣栧厛鎵撶牬榪欎釜浠g爜鐢變笂鍚戜笅欏哄簭絳夊悓浜庤繍琛屾椂鐨勫厛鍚庡驚搴忚繖涓寰嬶紝浠g爜緇撴瀯涓嶇敱鎵ц寰簭鍐沖畾錛岀敱浠涔堝喅瀹氬憿錛熺敱OO璁捐錛涜璁℃ā寮忎細鍙栦唬榪欎簺if else錛屼絾鏄渶鍚庢繪槸鐢變竴涓猄ervice絳夋葷被鎸夌収榪愯欏哄簭緇勮榪欎簺OO妯″潡錛屽彧鏈変竴澶勶紝榪欏鍙寘鍚簨鍔★紝涓鑸氨鏄疭ervice錛孍JB涓槸Session bean銆?/p>
銆銆涓鏃﹂渶姹傚彉鍖栵紝鎴戜滑鏇村鐨勫彲鑳芥槸Service涓悇涓狾O妯″潡錛岀敋鑷蟲槸鍙敼鍔⊿ervice涓殑OO妯″潡鎵ц欏哄簭灝辮兘絎﹀悎闇姹傘?/p>
銆銆榪欓噷鎴戜滑涔熺湅鍒癘O鍒嗙鐨勬濊礬錛屽皢浠ュ墠榪囩▼璇█鐨勪竴涓狹ain鍑芥暟褰誨簳鍒嗚В錛屽皢榪愯欏哄簭涓庝唬鐮佸叾浠栭昏緫鍒嗙寮鏉ワ紝鑰屼笉鏄薄闈㈠悜榪囩▼閭f牱娣蜂貢鍦ㄤ竴璧楓傛墍浠ユ湁浜烘劅鎱紝OO涔熸槸瑕侀『搴忕殑錛岃繖鏄偗瀹氱殑錛屽叧閿槸榪愯欏哄簭瑕佸崟鐙垎紱誨嚭鏉ャ?/p>
銆銆鏄惁鏈塱f else鍙互鐪嬪嚭浣犳湁娌℃湁灝嗚繍琛岄『搴忓垎紱誨埌瀹躲?/p>
璁捐妯″紡鐨勫垏鍏ュ彛
銆銆緇忓父鏈変漢鍙嶆槧錛岃璁℃ā寮忔槸涓嶉敊錛屼絾鏄垜寰堥毦鐢ㄥ埌錛屽叾瀹炲鏋滀綘浣跨敤if else鏉ュ啓浠g爜鏃訛紙闄ゆ樉紺烘帶鍒朵互澶栵級錛屽氨鏄湪鍐欎笟鍔¢昏緫錛屽彧涓嶈繃浣跨敤綆鍗曠殑鍒ゆ柇璇彞鏉ヤ綔涓虹幇瀹炴儏鍐電殑鏇夸唬鑰呫?/p>
銆銆 榪樻槸浠ュぇ瀹剁啛鎮夌殑璁哄潧甯栧瓙涓轟緥瀛愶紝濡侳orumMessage鏄竴涓ā鍨嬶紝浣嗘槸瀹為檯涓笘瀛愬垎涓ょ鎬ц川錛氫富棰樿創錛堢涓涓牴璐達級鍜屽洖甯栵紙鍥炰互鍓嶅笘瀛愮殑甯栧瓙錛夛紝榪欓噷鏈変竴涓湸绱犵殑瑙e喅鏂規錛?br />寤虹珛涓涓狥orumMessage錛岀劧鍚庡湪ForumMessage鍔犲叆isTopic榪欐牱鍒ゆ柇璇彞錛屾敞鎰忥紝浣犺繖閲屼竴涓畝鍗曞睘鎬х殑鍒ゆ柇寮曞叆錛屽彲鑳藉鑷翠綘鐨勭▼搴忓叾浠栧湴鏂瑰埌澶勫瓨鍦╥f else 鐨勫垽鏂?/p>
銆銆濡傛灉鎴戜滑鏀圭敤鍙﹀涓縐嶅垎鏋愬疄鐜版濊礬錛屼互瀵硅薄鍖栨蹇電湅寰咃紝瀹為檯涓湁涓婚璐村拰鍥炲笘錛屽氨鏄袱縐嶅璞★紝浣嗘槸榪欎袱縐嶅璞″ぇ閮ㄥ垎鏄竴鑷寸殑錛屽洜姝わ紝鎴戝皢ForumMessage璁句負琛ㄨ揪涓婚璐達紱鐒跺悗鍒涘緩涓涓戶鎵縁orumMessage鐨勫瓙綾籉orumMessageReply浣滀負鍥炲笘錛岃繖鏍鳳紝鎴戝湪紼嬪簭鍦版柟錛屽Service涓紝鎴戝凡緇忕‘瀹氳繖涓狹odel鏄洖甯栦簡錛屾垜灝辯洿鎺ヤ笅婧負ForumMessageReply鍗沖彲錛岃繖涓湁鐐圭被浼煎悜Collection鏀懼叆瀵硅薄鍜屽彇鍑烘椂鐨勫己鍒剁被鍨嬭漿鎹€傞氳繃榪欎釜鎵嬫鎴戞秷鐏簡浠ュ悗紼嬪簭涓璱f else鐨勫垽鏂鍙ュ嚭鐜板彲鑳姐?/p>
銆銆浠庤繖閲屼綋鐜頒簡錛屽鏋滃垎鏋愭柟鍚戦敊璇紝涔熶細瀵艱嚧璇敤妯″紡銆?/p>
銆銆璁ㄨ璁捐妯″紡涓句緥錛屼笉鑳芥病鏈変笟鍔′笂涓嬫枃鍦烘櫙鐨勬渚嬶紝鍚﹀垯鏃犳硶鍐沖畾鏄惁璇ョ敤妯″紡錛屼笅闈婦涓や釜瀵規瘮鐨勪緥瀛愶細
銆銆絎竴. 榪欎釜甯栧瓙涓婦渚嬬殑絎竴涓唬鐮佹渚嬫槸娌℃湁涓婁笅鏂囩殑錛屾枃涓彧璇存槑鏈変竴孌典唬鐮侊細
main() {
if錛坈ase A錛墈 //do with strategy A }else(case B){ //do with strategy B }else(case C){ //do with strategy C } } | 聽 |
銆銆榪欐浠g爜鍙槸綰補鐨勪唬鐮侊紝娌℃湁涓氬姟鍔熻兘錛屾墍浠ワ紝鍦ㄨ繖縐嶆儏鍐典笅錛屾垜浠氨寰堥毦紜畾浣跨敤浠涔堟ā寮忥紝灝辨槸涓瀹氱敤絳栫暐妯″紡絳夛紝涔熼冧笉榪囪繕鏄嬌鐢╥f else鐨勫懡榪愶紝璁捐妯″紡涓嶆槸欖旀硶錛屼笉鑳藉皢涓孌墊鏃犳剰涔夌殑浠g爜鍙樺緱綆鍗曚簡錛屽彧鑳藉皢鍏朵綋鐜扮殑涓氬姟鍔熻兘鏇村姞瀹規槗鍙嫇灞曚簡銆?/p>
銆銆絎簩.鍦?a target="_blank">榪欎釜甯栧瓙涓紝浣滆呬婦浜嗕竴涓狿acketParser涓氬姟妗堜緥錛岃繖孌典唬鐮佹槸浣撶幇涓氬姟鍔熻兘鐨勶紝鏄竴涓暟鎹寘鐨勫垎鏋愶紝浣滆呬篃姣旇緝浜嗗悇縐嶆ā寮忎嬌鐢ㄧ殑涓嶅悓錛屾墍浠ユ垜浠繕鏄嬌鐢ㄥ姩鎬佷唬鐞嗘ā寮忔垨Command妯″紡鏉ユ秷鐏偅浜涘彲鑳藉瓨鍦ㄧ殑if else
銆銆鐢變互涓婁袱涓渚嬭〃鏄庯細涓氬姟閫昏緫鏄垜浠嬌鐢ㄨ璁℃ā寮忕殑鍒囧叆鐐癸紝鑰屽湪鍒嗚В涓氬姟閫昏緫鏃訛紝鎴戜滑涔犳儻鍒欏彲鑳戒嬌鐢╥f else鏉ュ疄鐜幫紝褰撲綘鏈夎繖縐嶄紒鍥炬垨鑰呭凡緇忓疄鐜頒唬鐮佷簡錛岄偅涔堝氨搴旇鑰冭檻鏄惁闇瑕侀噸鏋凴efactoring浜嗐?br />
if else鏇夸唬鑰?/strong>
銆銆閭d箞瀹炴垬涓紝鍝簺璁捐妯″紡鍙互鏇夸唬if else鍛紵鍏跺疄GoF璁捐妯″紡閮藉彲浠ョ敤鏉ユ浛浠f else錛屾垜浠垎鍒弿榪板涓嬶細
聽 public class Order{ private int status; //璇存槑錛? //status=1 琛ㄧず璁㈣揣浣嗕負鏌ョ湅 錛?/p> //status=2 琛ㄧず宸茬粡鏌ョ湅鏈鐞嗭紱 //status=3 琛ㄧず宸茬粡澶勭悊鏈粯嬈?/p> //status=4 琛ㄧず宸茬粡浠樻鏈彂璐?/p> //status=5 琛ㄧず宸茬粡鍙戣揣 } |
OO璁捐鐨勬葷粨銆銆
銆銆榪樻湁涓縐嶄吉妯″紡錛岃櫧鐒朵嬌鐢ㄤ簡鐘舵佺瓑妯″紡錛屼絾鏄湪妯″紡鍐呴儴瀹炶川榪樻槸浣跨敤if else鎴杝witch榪涜鐘舵佸垏鎹㈡垨閲嶈鏉′歡鍒ゆ柇錛岄偅涔堟棤鐤戣鏄庤繕闇瑕佽繘涓姝ュ姫鍔涖傛洿閲嶈鐨勬槸錛屼笉鑳戒互妯″紡鑷眳錛岃屼笖鍑轟功紺轟漢銆?/p>
銆銆鐪熸鎺屾彙闈㈠悜瀵硅薄榪欎簺鎬濇兂鏄竴浠跺洶闅劇殑浜嬫儏錛岀洰鍓嶆湁鍚勭灞炰簬鎻潃鑷繁澶村彂鍚戜笂鎷旂殑瑙h錛岄兘鏄浜哄瓙寮熺殑錛屾墍浠ユ垜瑙夊緱鍒濆鑰呰Thinking in Java錛圝ava緙栫▼鎬濇兂錛夋槸娌℃湁鐢紝瀹冭瘯鍥句粠璇█灞傛鏉ヨOO緙栫▼鎬濇兂錛岄潪甯稿け璐ワ紝浣滀負璇█鍙傝冧功鍙互錛屼絾鏄綔涓篔ava浣撶幇鐨凮O鎬濇兂鐨勫涔犺祫鏂欙紝灝遍敊浜嗐?/p>
銆銆OO緙栫▼鎬濇兂鏄竴縐嶆柟娉曡錛屾柟娉曡濡傛灉娌℃湁搴旂敤姣旇緝錛屾槸鏃犳硶浣撲細榪欎釜鏂規硶璁虹殑鐗圭偣鐨勶紝紱呮槸鍙や唬涓涓柟娉曡錛屾偀紱呮槸闈犳寫姘寸爫鏌磋繖浜涘簲鐢ㄦ墠鑳戒綋浼氥?/p>
銆銆閭d箞OO鎬濇兂闈犱粈涔堝簲鐢ㄨ兘澶熶綋浼氬埌浜嗭紵鏄疓oF璁捐妯″紡錛孏oF璁捐妯″紡鏄瓑浜庤蔣浠朵漢鍛樼殑鎸戞按鐮嶆煷絳夊熀鏈椿錛屾墍浠ワ紝濡傛灉涓涓▼搴忓憳榪炲熀鏈椿閮戒笉浼氾紝浠栦綍浠ヨ嚜灞匫O紼嬪簭鍛橈紵浠庝簨OO涓撲笟璁捐緙栫▼榪欎釜宸ヤ綔錛屽鏋滀笉鎺屾彙璁捐妯″紡鍩烘湰鍔燂紝灝辮薄涓涓仛鍜屽皻鐨勪漢涓嶆効鎰忔寫姘寸爫鏌達紝浠栦綍浠ョ珛瓚寵繖涓涓氾紵鏃╁氨琚笀鍌呰刀涓嬪北銆?/p>
銆銆鏈鍚庢葷粨錛氬皢if else鐢ㄥ湪灝忓湴鏂硅繕鍙互錛屽綆鍗曠殑鏁板煎垽鏂紱浣嗘槸濡傛灉鎸夌収浣犵殑浼犵粺涔犳儻鎬濈淮錛屽湪瀹炵幇涓氬姟鍔熻兘鏃朵篃浣跨敤if else錛岄偅涔堣鏄庝綘鐨勬濈淮鍙兘闇瑕侀噸濉戯紝浣犵殑緙栫▼緇忛獙瓚婁赴瀵岋紝浼犵粺榪囩▼鎬濈淮妯″紡灝卞鏄撴牴娣辮拏鍥猴紝鎯抽潬鑷繁鏀瑰彉寰堝洶闅撅紱寤鴻鎺ュ彈涓撲笟澶磋剳椋庢毚鍩硅銆?/p>
銆銆鐢ㄤ竴鍙ヨ瘽鎬葷粨錛氬鏋滀綘鍋氫簡涓嶅皯緋葷粺錛屽緢涔呮病鏈変嬌鐢╥f else浜嗭紝閭d箞璇存槑浣犲彲鑳界湡姝h繘鍏O璁捐鐨勫鍦頒簡銆傦紙榪欐槸鏈漢鑷繁鍙戞槑鐨勫疄鎴樻х殑琛¢噺鑰冩牳鏍囧噯錛夈?/p>
鐩稿叧璧勬枡錛?/p>
鍦↗ava Collection Framework涓畾涔夌殑List瀹炵幇鏈塚ector錛孉rrayList鍜孡inkedList銆傝繖浜涢泦鍚堟彁渚涗簡瀵瑰璞$粍鐨勭儲寮曡闂備粬浠彁渚涗簡鍏冪礌鐨勬坊鍔犱笌鍒犻櫎鏀寔銆傜劧鑰岋紝瀹冧滑騫舵病鏈夊唴緗殑鍏冪礌鎺掑簭鏀寔.
浣犺兘澶熶嬌鐢╦ava.util.Collections綾諱腑鐨剆ort()鏂規硶瀵筁ist鍏冪礌榪涜鎺掑簭銆備綘鏃㈠彲浠ョ粰鏂規硶浼犻掍竴涓狶ist瀵硅薄錛屼篃鍙互浼犻掍竴涓狶ist鍜屼竴涓狢omparator銆傚鏋滃垪琛ㄤ腑鐨勫厓绱犲叏閮芥槸鐩稿悓綾誨瀷鐨勭被錛屽茍涓旇繖涓被瀹炵幇浜咰omparable鎺ュ彛錛屼綘鍙互綆鍗曠殑璋冪敤Collections.sort()銆傚鏋滆繖涓被娌℃湁瀹炵幇Comparator錛屼綘涔熷彲浠ヤ紶閫掍竴涓狢omparator鍒版柟娉晄ort()涓紝榪涜鎺掑簭銆傚鏋滀綘涓嶆兂浣跨敤緙虹渷鐨勫垎綾婚『搴忚繘琛屾帓搴忥紝浣犲悓鏍峰彲浠ヤ紶閫掍竴涓狢omparator鍒版柟娉晄ort()涓潵榪涜鎺掑簭銆傚鏋滃垪琛ㄤ腑鐨勫厓绱犲茍涓嶉兘鏄浉鍚岀被鍨嬬殑綾伙紝浣犲湪榪涜鎺掑簭鐨勬椂鍊欏氨涓嶆槸榪欐牱騫歌繍浜嗐傞櫎闈炰綘緙栧啓涓涓笓鐢ㄧ殑璺ㄧ被鐨凜omparator銆?/font>
銆銆鎺掑簭鐨勯『搴忔庝箞鏍峰憿錛熷鏋滃厓绱犳槸String瀵硅薄錛屽嵈鐪佺殑鎺掑簭欏哄簭鏄寜鐓у瓧絎︾紪鐮佽繘琛岀殑錛屽熀鏈笂鏄瘡涓瓧絎︾殑ASCII/Unicode鍊箋傚鏋滀弗鏍肩殑闄愬埗鍦ㄥ鐞嗚嫳鏂囷紝鍗寸渷鐨勬帓搴忛『搴忛氬父鏄凍澶熺殑錛屽洜涓哄畠棣栧厛鎺扐-Z錛岀劧鍚庢槸灝忓啓瀛楁瘝a-z銆傜劧鑰屽鏋滀綘澶勭悊闈炶嫳鏂囧瓧錛屾垨鑰呬綘鍙槸鎯充嬌鐢ㄤ笉鍚岀殑鎺掑簭欏哄簭錛岃繖鏍稢ollections.sort()灝卞嚭鐜頒簡絎簩縐嶅彉鍖栥備緥濡傦紝浣犳兂浣跨敤瀛楃涓茬殑鍙嶅簭榪涜鎺掑簭銆備負浜嗗疄鐜拌繖涓姛鑳斤紝浣犲彲浠ュ湪Collections綾諱腑閫氳繃reverseOrder()鏉ヨ幏鍙栦竴涓弽搴廋omparator銆傜劧鍚庯紝浣犲皢鍙嶅簭Comparator浼犻掔粰sort()鏂規硶銆傛崲鍙ヨ瘽璇達紝浣犱綔濡備笅宸ヤ綔錛?
List list = ...; Comparator comp = Collections.reverseOrder(); Collections.sort(list, comp); |
銆銆濡傛灉鍒楄〃鍖呭惈欏圭洰錛歁an, man, Woman, 鍜寃oman錛屾帓搴忓ソ鐨勫垪琛ㄥ皢鏄疢an, Woman, man, woman銆傝繖閲屾病鏈変粈涔堝鏉傜殑銆傞渶瑕佹敞鎰忕殑闈炲父閲嶈鐨勪竴鐐規槸Collections.sort()鏄繘琛屽師浣嶆帓搴忋傚鏋滀綘闇瑕佷繚鐣欏師搴忥紝闇瑕佸厛瀵瑰師闆嗗悎榪涜澶嶅埗錛屽湪鎺掑簭錛屽氨鍍忚繖鏍鳳細
List list = ...; List copyOfList = new ArrayList(list); Collections.sort(copyOfList); |
銆銆榪欓噷錛屾帓濂藉簭鐨勫垪琛ㄦ槸錛歁an, Woman, man, woman錛屼絾鏄師濮嬪垪琛紙Man, man, Woman, woman錛夎淇濈暀浜嗐?/font>
銆銆鍒扮洰鍓嶄負姝紝鎺掑簭鏄尯鍒嗗ぇ灝忓啓鐨勩備綘濡備綍榪涜涓嶅幓鍒嗗ぇ灝忓啓鐨勬帓搴忓憿錛熶竴縐嶅疄鐜版柟寮忔槸璞¤繖鏍峰疄鐜癈omparator:
public static class CaseInsensitiveComparator implements Comparator { public int compare(Object element1, Object element2) { String lower1 = element1.toString().toLowerCase(); String lower2 = element2.toString().toLowerCase(); return lower1.compareTo(lower2); } } |
銆銆浣犵‘瀹炰笉闇瑕佹墜宸ョ殑鍒涘緩榪欎釜綾匯傝屾槸錛屼綘鍙互鏄敤浠ュ瓨鍦ㄧ殑Comparator錛孋ASE_INSENSIVTIVE_ORDER錛屽畠鏄湪String綾諱腑瀹氫箟鐨勩?/font>
銆銆榪欑瀹炵幇鏂瑰紡鏈変竴鐐瑰皬灝忕殑闂銆係ort()綆楁硶鎻愪緵紼沖畾鐨勬帓搴忥紝騫朵繚鎸佷笌鍘熸湁搴忓垪鐩稿悓鐨勫厓绱犮傝繖鎰忓懗鐫涓涓寘鍚袱涓厓绱犫漺oman鈥濆拰鈥漌oman鈥濈殑鍒楄〃灝嗘湁涓嶅悓鐨勬帓搴忥紝鑰岃繖縐嶄笉鍚屾槸鏍規嵁涓や釜鍏冪礌鍦ㄥ垪琛ㄤ腑鍑虹幇鐨勫厛鍚庢搴忓喅瀹氱殑銆?/font>
銆銆璇█鐨勪笉鍚屽張浼氭庝箞鏍峰憿錛焜ava.text鍖呮彁渚涗簡Collector鍜孋ollectionKey綾繪潵榪涜鍖哄垎璇█鐨勬帓搴忋傝繖閲屾槸渚嬪瓙:
銆銆娉ㄦ剰錛屽鏋滀綘鐨勬枃鏈槸鏈湴璇█錛岃屼笉鏄己鐪佽璦錛屼綘闇瑕佷紶閫掍竴涓湰鍦拌縐嶇粰getInstance()鏂規硶錛屽氨璞?
public static class CollatorComparator implements Comparator { Collator collator = Collator.getInstance(); public int compare(Object element1, Object element2) { CollationKey key1 = collator.getCollationKey( element1.toString()); CollationKey key2 = collator.getCollationKey( element2.toString()); return key1.compareTo(key2); } } |
銆銆浣犳槸鍦ㄥ闆嗗悎鍏抽敭瀛楄繘琛屾帓搴忥紝鑰屼笉鏄疄闄呯殑瀛楃涓層傝繖涓嶄粎鎻愪緵鍥哄畾鐨勪笉鍖哄垎澶у皬鍐欑殑鎺掑簭錛岃屼笖瀹冩槸璺ㄨ縐嶇殑鎺掑簭銆傛崲鍙ヨ瘽璇達紝濡傛灉浣犲瑗跨彮鐗欐枃鍜岄潪瑗跨彮鐗欐枃鐨勬販鍚堣瘝榪涜鎺掑簭錛岃瘝ma?ana (tomorrow)灝嗘帓鍦╩antra鐨勫墠闈€傚鏋滀綘涓嶄嬌鐢–ollector錛宮a?ana灝嗘帓鍦╩antra鐨勫悗闈€?/font>
銆銆涓嬮潰榪欎釜紼嬪簭瀵逛竴涓垪琛ㄨ繘琛屼笉鍚岀被鍨嬬殑鎺掑簭錛堢己鐪佺殑銆佸尯鍒嗗ぇ灝忓啓鐨勩佸尯鍒嗚縐嶇殑錛夛細
import java.awt.BorderLayout; import java.awt.Container; import java.io.*; import java.text.*; import java.util.*; import javax.swing.*; public class SortIt { public static class CollatorComparator implements Comparator { Collator collator = Collator.getInstance(); public int compare(Object element1, Object element2) { CollationKey key1 = collator.getCollationKey( element1.toString()); CollationKey key2 = collator.getCollationKey( element2.toString()); return key1.compareTo(key2); } } public static class CaseInsensitiveComparator implements Comparator { public int compare(Object element1, Object element2) { String lower1 = element1.toString(). toLowerCase(); String lower2 = element2.toString(). toLowerCase(); return lower1.compareTo(lower2); } } public static void main(String args[]) { String words[] = {"man", "Man", "Woman", "woman", "Manana", "manana", "ma?ana", "Ma?ana", "Mantra", "mantra", "mantel", "Mantel" }; // Create frame to display sortings JFrame frame = new JFrame("Sorting"); frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE); Container contentPane = frame.getContentPane(); JTextArea textArea = new JTextArea(); JScrollPane pane = new JScrollPane(textArea); contentPane.add(pane, BorderLayout.CENTER); // Create buffer for output StringWriter buffer = new StringWriter(); PrintWriter out = new PrintWriter(buffer); // Create initial list to sort List list = new ArrayList(Arrays.asList(words)); out.println("Original list:"); out.println(list); out.println(); // Perform default sort Collections.sort(list); out.println("Default sorting:"); out.println(list); out.println(); // Reset list list = new ArrayList(Arrays.asList(words)); // Perform case insensitive sort Comparator comp = new CaseInsensitiveComparator(); Collections.sort(list, comp); out.println("Case insensitive sorting:"); out.println(list); out.println(); // Reset list list = new ArrayList(Arrays.asList(words)); // Perform collation sort comp = new CollatorComparator(); Collections.sort(list, comp); out.println("Collator sorting:"); out.println(list); out.println(); // Fill text area and display textArea.setText(buffer.toString()); frame.pack(); frame.show(); } } |
銆銆濡傛灉浣犵殑涓昏闂鏄『搴忚闂紝鍙兘鍒楄〃涓嶆槸浣犵殑濂界殑鏁版嵁緇撴瀯閫夋嫨銆傚彧瑕佷綘鐨勯泦鍚堟病鏈夐噸澶嶏紝浣犲彲浠ュ湪鏍戯紙TreeSet錛変腑淇濆瓨浣犵殑鍏冪礌錛堟彁渚涙垨涓嶆彁渚汣omparator錛夈傝繖鏍鳳紝鍏冪礌灝嗘繪槸鎺掑簭褰㈠紡鐨勩?/font>