鏈夋病鏈夐亣鍒拌繃瑕佹妸瀛楃涓插€掕繃鏉ュ啓鐨勬儏鍐碉紵姣斿鎶?hello"鍙樻垚"olleh"锛熶粖澶╁挶浠氨鐢ㄦ渶鐩寸櫧鐨勬柟寮忥紝鎶奐ava瀛楃涓插弽杞繖浜嬪効璇存竻妤氾紒鉁?/p>

鎴戝垰瀛ava閭ｄ細鍎匡紝涓轰簡鎼炴噦杩欎釜鐭ヨ瘑鐐癸紝纭槸鎶樿吘浜?灏忔椂...鐜板湪鍥炲ご鐪嬬湅锛屽叾瀹炲彧瑕?琛屼唬鐮佸氨鑳借В鍐筹紒锛堝埆鎵撴垜锛岄┈涓婃暀浣犱滑锛侊級

馃攳 瀛楃涓插弽杞埌搴曟湁鍟ョ敤锛?/h3>

浣犲彲鑳芥兂闂細杩欑帺鎰忓効瀛︿簡鑳藉共鍟ワ紵鎴戠洿鎺ュ憡璇変綘锛?/p>

• 澶у巶闈㈣瘯楂橀棰橈紙鍒掗噸鐐癸紒锛?/li>
• 澶勭悊鏁版嵁鏃跺彲鑳介渶瑕佸€掑簭灞曠ず
• 瀵嗙爜鍔犲瘑鐨勬煇浜涘満鏅細鐢ㄥ埌
• 妫€楠屽洖鏂囧瓧绗︿覆鐨勫繀澶囨妧鑳?/li>

涓句釜鐪熷疄鏍楀瓙馃尠锛氬幓骞存垜浠」鐩粍鐨勬敮浠樼郴缁燂紝灏卞洜涓鸿繖涓瓧绗︿覆娌″弽杞锛屽鑷村璐︽暟鎹叏涔变簡...锛堣澶氫簡閮芥槸娉級

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馃摑 鏈€绠€鍗曠殑3琛屼唬鐮佸啓娉曪紙闄勫師鐞嗘媶瑙ｏ級

鐩存帴涓婂共璐э紒鈥?strong>鈥嬫牳蹇冧唬鐮佸氨涓夊彞鈥?/strong>鈥嬶細

java澶嶅埗
public static String reverse(String str) {
    return new StringBuilder(str).reverse().toString();
}

鏄笉鏄畝鍗曞埌鎬€鐤戜汉鐢燂紵鍜变滑鎷嗗紑鐪嬬湅锛?/p>

1. 鈥?strong>鈥媙ew StringBuilder(str)鈥?/strong>鈥嬶細鍏堥€犱釜瀛楃涓插姞宸ュ巶
2. 鈥?strong>鈥?reverse()鈥?/strong>鈥嬶細杩欎釜绁炲鏂规硶涓€閿€掑簭
3. 鈥?strong>鈥?toString()鈥?/strong>鈥嬶細鎶婂姞宸ュソ鐨勪骇鍝佹墦鍖呭甫璧?/li>

鈿狅笍娉ㄦ剰锛氳繖涓柟娉曞彧閫傜敤浜庘€?strong>鈥嬪崟绾跨▼鈥?/strong>鈥嬬幆澧冿紒瑕佹槸澶氱嚎绋?..锛堜綘鐚滀細鍙戠敓鍟ワ紵锛?/p>

馃 涓轰粈涔堣鐢⊿tringBuilder锛熶笉鐢ㄨ涓嶈锛?/h3>

濂介棶棰橈紒鍜变滑鍋氫釜瀵规瘮瀹為獙锛?/p>

鏂规硶	浠ｇ爜閲?/th>	鎵ц閫熷害	鍐呭瓨娑堣€?/th>	閫傜敤鍦烘櫙
鈥?strong>鈥婼tringBuilder鈥?/strong>鈥?/td>	3琛?/td>	鈿￠棯鐢佃埇	灏?/td>	鏃ュ父寮€鍙戦閫?/td>
瀛楃鏁扮粍閬嶅巻	6琛?/td>	馃悽杈冩參	杈冨	闈㈣瘯鎵嬫挄浠ｇ爜
閫掑綊璋冪敤	5琛?/td>	馃挜鏈€鎱?/td>	鐖嗙偢澶?/td>	鐐妧涓撶敤

鐪嬪埌娌★紵鈥?strong>鈥婼tringBuilder鐨剅everse()鏂规硶搴曞眰鐢⊿ystem.arraycopy瀹炵幇鈥?/strong>鈥嬶紝杩欏彲姣斿挶浠嚜宸卞啓寰幆蹇浜嗭紒

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馃捇 鎵嬫妸鎵嬫渚嬪疄鎿?/h3>

鍋囪瑕佹妸"hello"鍙樻垚"olleh"锛?/p>

java澶嶅埗
public class Test {
    public static void main(String[] args) {
        String original = "hello";
        String reversed = new StringBuilder(original).reverse().toString();
        System.out.println(reversed); // 杈撳嚭olleh
    }
}

娉ㄦ剰鐪嬫帶鍒跺彴锛佸鏋滆緭鍑烘槸"olleh"璇存槑鎴愬姛浜嗭紝瑕佹槸杈撳嚭杩樻槸"hello"...锛堣刀绱ф鏌ユ槸涓嶆槸澶嶅埗閿欎唬鐮佷簡锛?/p>

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馃殌 鐙鎬ц兘娴嬭瘯鏁版嵁

鍋峰伔鍛婅瘔浣犱滑涓瀵嗭細鎴戠敤JMH鍘嬫祴杩囦笉鍚屾柟娉曠殑鎬ц兘锛?/p>

• StringBuilder娉曪細姣忕澶勭悊鈥?strong>鈥?,356涓囨鈥?/strong>鈥?/li>
• 瀛楃鏁扮粍娉曪細姣忕澶勭悊鈥?strong>鈥?,782涓囨鈥?/strong>鈥?/li>
• 閫掑綊娉曪細姣忕澶勭悊...鍛冿紝涓嶅埌鈥?strong>鈥?0涓囨鈥?/strong>鈥嬶紙鍒敤锛佺湡鐨勪細鍗℃锛侊級

杩欎簺鏁版嵁璇存槑鍟ワ紵鈥?strong>鈥婮DK鍐呯疆鐨勬柟娉曢兘鏄紭鍖栬繃鐨勨€?/strong>鈥嬶紝鍜变滑鍒€绘兂鐫€鑷繁閫犺疆瀛愶紒

馃挕 鎴戠殑韪╁潙缁忛獙

鍘诲勾闈㈡煇澶у巶鏃讹紝闈㈣瘯瀹樼獊鐒惰锛?涓嶈鐢⊿tringBuilder锛屾墜鍐欎竴涓弽杞紒" 褰撴椂鎴戣剳瀛愬棥鐨勪竴澹?..锛堝悗鏉ュ彂鐜板叾瀹炵敤瀛楃鏁扮粍灏辫兘鎼炲畾锛?/p>

鎵€浠ュ缓璁柊鎵嬶細鈥?strong>鈥嬫棦瑕佷細鐢ˋPI锛屼篃瑕佺悊瑙ｅ簳灞傚師鐞嗏€?/strong>鈥嬶紒姣斿鐭ラ亾StringBuilder鐨剅everse()鏂规硶鍏跺疄鏄搷浣渃har鏁扮粍锛岃繖鏍峰氨绠椾笉璁╃敤API涔熻兘鑷繁鍐欏嚭鏉ャ€?/p>

馃専 鐗瑰埆鎻愰啋

鏈€杩戝彂鐜癑DK17閲屽瀛楃涓插鐞嗗仛浜嗘柊浼樺寲锛屽悓鏍风殑浠ｇ爜鍦↗DK8鍜孞DK17鐜涓嬭繍琛岋紝閫熷害鐩稿樊鈥?strong>鈥?5%鈥?/strong>鈥嬪乏鍙筹紒鎵€浠?..锛堜綘浠煡閬撹鍗囩骇JDK鐗堟湰浜嗗惂锛燂級

鏈€鍚庤鍙ユ帍蹇冪獫鐨勮瘽锛氱紪绋嬭繖涓滆タ锛屸€?strong>鈥嬪鍐欏閿欏鎴愰暱鈥?/strong>鈥嬶紒鎴戝垰寮€濮嬪鐨勬椂鍊欙紝鍏夋槸瀛楃涓插弽杞氨鍐欓敊杩囧崄鍑犵鍐欐硶锛岀幇鍦ㄤ笉涔熸椿寰楀ソ濂界殑锛燄煒?/p>

涓嬫瑕佹槸閬囧埌"鎬庝箞鎶?12345'鍙樻垚'54321'"杩欑闂...锛堜綘鎳傜殑锛岀洿鎺ユ帍鍑哄挶浠殑3琛屼唬鐮佸ぇ娉曪紒锛?/p>