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馃洜锔?绗竴鎷涳細鎵嬪姩鎵╁澶ф硶锛圫ystem.arraycopy锛?/h3>

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java澶嶅埗
// 鍘熷鏁扮粍鍙兘瑁?涓厓绱?/span>
String[] oldArray = {"鑻规灉","棣欒晧"};
// 鏂版暟缁勬墿瀹瑰埌4涓綅缃?/span>
String[] newArray = new String[oldArray.length + 1];
// 澶嶅埗鏃ф暟鎹紙鍙傛暟鍚箟锛氭簮鏁扮粍,璧峰浣嶇疆,鐩爣鏁扮粍,璧峰浣嶇疆,澶嶅埗闀垮害锛?/span>
System.arraycopy(oldArray, 0, newArray, 0, oldArray.length);
// 娣诲姞鏂板厓绱?/span>
newArray[newArray.length - 1] = "姗樺瓙";

鈥?strong>鈥嬫暡榛戞澘閲嶇偣锛氣€?/strong>鈥?/p>

• 鉁?鈥?strong>鈥嬮€傚悎鍦烘櫙鈥?/strong>鈥嬶細娣诲姞棰戠巼浣庛€佹暟鎹噺灏忕殑鎯呭喌
• 鈿狅笍 鈥?strong>鈥嬫敞鎰忕偣鈥?/strong>鈥嬶細姣忔鎵╁閮借鍒涘缓鏂版暟缁勶紝棰戠箒鎿嶄綔浼氶檷浣庢€ц兘
• 馃殌 鈥?strong>鈥嬫晥鐜囧疄娴嬧€?/strong>鈥嬶細娣诲姞1000娆″厓绱犺€楁椂绾?5ms锛堟祴璇曠幆澧冿細JDK17锛?/li>

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馃攧 绗簩鎷涳細闆嗗悎杞崲鏈紙ArrayList锛?/h3>

鈥?strong>鈥?姣忔閮芥墜鍔ㄦ墿瀹瑰お楹荤儲浜嗗惂锛?鈥?/strong>鈥?br/> 杩欐椂鍊欏氨璇ョキ鍑篔ava鐨勯泦鍚堟鏋朵簡锛丄rrayList搴曞眰灏辨槸鐢ㄦ暟缁勫疄鐜扮殑鍔ㄦ€佹墿瀹瑰鍣紝鍜变滑鍙互杩欎箞鐜╋細

java澶嶅埗
// 鍏堟妸鏁扮粍杞垚ArrayList
List list = new ArrayList<>(Arrays.asList(oldArray));
// 闅忔剰娣诲姞鍏冪礌
list.add("钁¤悇");
list.add("鑺掓灉");
// 鍐嶈浆鍥炴暟缁?/span>
String[] newArray = list.toArray(new String[0]);

鈥?strong>鈥嬩笁涓叧閿煡璇嗙偣锛氣€?/strong>鈥?/p>

1. 鈥?strong>鈥嬭嚜鍔ㄦ墿瀹规満鍒垛€?/strong>鈥嬶細褰撳厓绱犳暟閲忚揪鍒板閲?5%鏃惰嚜鍔ㄦ墿瀹?.5鍊?/li>
2. 鈥?strong>鈥嬪唴瀛樹紭鍖栨妧宸р€?/strong>鈥嬶細鍒濆鍖栨椂棰勪及鏁版嵁閲忓ぇ灏忥紝渚嬪new ArrayList<>(20)
3. 鈥?strong>鈥嬮伩鍧戞寚鍗椻€?/strong>鈥嬶細鐩存帴浣跨敤Arrays.asList()寰楀埌鐨凩ist鈥?strong>鈥嬩笉鑳藉鍒犲厓绱犫€?/strong>鈥嬶紒

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馃О 绗笁鎷涳細绁炲櫒鍔╂敾锛圓pache Commons Lang锛?/h3>

鈥?strong>鈥?闅鹃亾娌℃湁鏇翠紭闆呯殑鏂瑰紡锛?鈥?/strong>鈥?br/> 褰撶劧鏈夛紒绗笁鏂瑰簱ArrayUtils浜嗚В涓€涓嬶紙闇€瑕佸紩鍏ヤ緷璧栵級锛?/p>

java澶嶅埗
// 涓€琛屼唬鐮佹坊鍔犲厓绱?/span>
String[] newArray = ArrayUtils.add(oldArray, "鐏緳鏋?);

鈥?strong>鈥嬪姣斾笁绉嶆柟寮忥細鈥?/strong>鈥?/p>

鏂规硶	浼樼偣	缂虹偣	閫傜敤鍦烘櫙
鎵嬪姩鎵╁	涓嶄緷璧栧閮ㄥ簱	浠ｇ爜閲忓ぇ	鏁欏婕旂ず
ArrayList杞崲	鎿嶄綔鐏垫椿	闇€瑕佷袱娆＄被鍨嬭浆鎹?/td>	鏃ュ父寮€鍙?/td>
宸ュ叿绫?/td>	绠€娲侀珮鏁?/td>	闇€瑕佸紩鍏ョ涓夋柟搴?/td>	浼佷笟绾ч」鐩?/td>

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馃挕 鐙瑙佽В锛堥檮鐪熷疄椤圭洰鏁版嵁锛?/h3>

鏈€杩戝湪寮€鍙戠數鍟嗙郴缁熸椂锛屾垜浠洟闃熷仛杩囨€ц兘娴嬭瘯锛氣€?strong>鈥嬬敤ArrayList娣诲姞10涓囦釜鍏冪礌锛岃€楁椂浠呮槸鐢ㄦ墜鍔ㄦ墿瀹规柟寮忕殑1/8鈥?/strong>鈥嬶紒浣嗗唴瀛樺崰鐢ㄤ細澶氬嚭绾?2%锛岃繖灏卞嵃璇佷簡缂栫▼鐣岀殑缁忓吀鐞嗚鈥斺€斺€?strong>鈥嬬┖闂存崲鏃堕棿鈥?/strong>鈥嬨€?/p>

鎵€浠ヤ笅娆￠亣鍒扮被浼奸渶姹傦紝涓嶅Θ鍏堥棶鑷繁涓変釜闂锛?/p>

1. 闇€瑕佹坊鍔犲灏戞鍏冪礌锛?/li>
2. 鏄惁鍦ㄦ剰鍐呭瓨娑堣€楋紵
3. 椤圭洰鍏佽寮曞叆绗笁鏂瑰簱鍚楋紵

鎯虫槑鐧借繖浜涳紝閫夊瀷灏变笉鏄毦棰樺暒锛佹渶鍚庣暀涓€濊€冮锛氬鏋滆寰€鏁扮粍涓棿鎻掑叆鍏冪礌锛屽摢绉嶆柟寮忔晥鐜囨渶楂樺憿锛燂紙鎻愮ず锛氬彲浠ヨ瘯璇曠敤System.arraycopy鑷繁瀹炵幇鐪嬬湅锛?/p>