锘??xml version="1.0" encoding="utf-8" standalone="yes"?>亚洲精品国产av成拍色拍,亚洲av无码专区在线观看亚,久久久久亚洲精品日久生情http://m.tkk7.com/asklxf/category/5513.htmlA java developer's notebook.zh-cnFri, 02 Mar 2007 02:54:23 GMTFri, 02 Mar 2007 02:54:23 GMT60JDK婧愮爜鍒嗘瀽錛歫ava.lang.Booleanhttp://m.tkk7.com/asklxf/articles/22201.htmlXuefeng's WeblogXuefeng's WeblogFri, 02 Dec 2005 02:35:00 GMThttp://m.tkk7.com/asklxf/articles/22201.htmlhttp://m.tkk7.com/asklxf/comments/22201.htmlhttp://m.tkk7.com/asklxf/articles/22201.html#Feedback0http://m.tkk7.com/asklxf/comments/commentRss/22201.htmlhttp://m.tkk7.com/asklxf/services/trackbacks/22201.html闂叉潵鏃犱簨錛屽紑濮嬬爺絀禞DK婧愮爜錛坖dk 1.5 b2錛夛紝鍏堟壘浜嗕竴涓渶綆鍗曠殑java.lang.Boolean寮濮嬭В鍓栥?BR>
鐢變簬姘村鉤鏈夐檺錛岄毦鍏嶆湁涓嶅皯閿欒錛岃繕璇峰ぇ瀹舵寚姝ｏ紒

棣栧厛鎴戜滑鍓旈櫎鎵鏈夌殑鏂規硶鍜岄潤鎬佸彉閲忥紝Boolean鐨勬牳蹇冧唬鐮佸涓嬶細

public final class Boolean implements java.io.Serializable,Comparable
{
    private final boolean value;
}

寰堟槑鏄撅紝鍑℃槸鎴愬憳鍙橀噺閮芥槸final綾誨瀷鐨勶紝涓瀹氭槸immutable class錛岃繖涓狟oolean鍜孲tring涓鏍鳳紝涓鏃︽瀯閫犲嚱鏁版墽琛屽畬姣曪紝瀹炰緥鐨勭姸鎬佸氨涓嶈兘鍐嶆敼鍙樹簡銆?BR>
Boolean鐨勬瀯閫犲嚱鏁版湁涓や釜錛?/P>

public Boolean(boolean value) {
    this.value = value;
}
public Boolean(String s) {
    this(toBoolean(s));
}

閮藉緢綆鍗曞氨涓嶅璇翠簡銆?BR>
鍙﹀娉ㄦ剰鍒癇oolean綾誨疄闄呬笂鍙湁涓ょ涓嶅悓鐘舵佺殑瀹炰緥錛氫竴涓寘瑁卼rue錛屼竴涓寘瑁協alse錛孊oolean鍙堟槸immutable class錛屾墍浠ュ湪鍐呭瓨涓浉鍚岀姸鎬佺殑Boolean瀹炰緥瀹屽叏鍙互鍏變韓錛屼笉蹇呯敤new鍒涘緩寰堝瀹炰緥銆傚洜姝oolean class榪樻彁渚涗袱涓潤鎬佸彉閲忥細

public static final Boolean TRUE = new Boolean(true);
public static final Boolean FALSE = new Boolean(false);

榪欎袱涓彉閲忓湪Class Loader瑁呰澆鏃跺氨琚疄渚嬪寲錛屽茍涓旂敵鏄庝負final錛屼笉鑳藉啀鎸囧悜鍏朵粬瀹炰緥銆?BR>
鎻愪緵榪欎袱涓潤鎬佸彉閲忔槸涓轟簡璁╁紑鍙戣呯洿鎺ヤ嬌鐢ㄨ繖涓や釜鍙橀噺鑰屼笉鏄瘡嬈￠兘new涓涓狟oolean錛岃繖鏍鋒棦鑺傜渷鍐呭瓨鍙堥伩鍏嶄簡鍒涘緩涓涓柊瀹炰緥鐨勬椂闂村紑閿銆?BR>
鍥犳錛岀敤
    Boolean b = Boolean.TRUE;
姣?BR>    Boolean b = new Boolean(true);
瑕佸ソ寰楀銆?BR>
濡傛灉閬囧埌涓嬮潰鐨勬儏鍐碉細
    Boolean b = new Boolean(var);
涓瀹氳鏍規嵁涓涓猙oolean鍙橀噺鏉ュ垱寤築oolean瀹炰緥鎬庝箞鍔烇紵

鎺ㄨ崘浣犱嬌鐢˙oolean鎻愪緵鐨勯潤鎬佸伐鍘傛柟娉曪細
    Boolean b = Boolean.valueOf(var);
榪欐牱灝卞彲浠ラ伩鍏嶅垱寤烘柊鐨勫疄渚嬶紝涓嶄俊鐪嬬湅valueOf()闈欐佹柟娉曪細

public static Boolean valueOf(boolean b) {
    return (b ? TRUE : FALSE);
}

榪欎釜闈欐佸伐鍘傛柟娉曡繑鍥炵殑浠嶇劧鏄袱涓潤鎬佸彉閲廡RUE鍜孎ALSE涔嬩竴錛岃屼笉鏄痭ew涓涓狟oolean鍑烘潵銆傝櫧鐒禕oolean闈炲父綆鍗曪紝鍗犵敤鐨勫唴瀛樹篃寰堝皯錛屼絾鏄竴涓鏉傜殑綾葷敤new鍒涘緩瀹炰緥鐨勫紑閿鍙兘闈炲父澶э紝鑰屼笖錛屼嬌鐢ㄥ伐鍘傛柟娉曞彲浠ユ柟渚跨殑瀹炵幇緙撳瓨瀹炰緥錛岃繖瀵瑰鎴風鏄忔槑鐨勩傛墍浠ワ紝鑳界敤宸ュ巶鏂規硶灝變笉瑕佺敤new銆?BR>
鍜孊oolean鍙湁涓ょ鐘舵佷笉鍚岋紝Integer涔熸槸immutable class錛屼絾鏄姸鎬佷笂浜跨錛屼笉鍙兘鐢ㄩ潤鎬佸疄渚嬬紦瀛樻墍鏈夌姸鎬併備笉榪囷紝SUN鐨勫伐紼嬪笀榪樻槸浣滀簡涓鐐逛紭鍖栵紝Integer綾葷紦瀛樹簡-128鍒?27榪?56涓姸鎬佺殑Integer錛屽鏋滀嬌鐢↖nteger.valueOf(int i)錛屼紶鍏ョ殑int鑼冨洿姝ｅソ鍦ㄦ鍐咃紝灝辮繑鍥為潤鎬佸疄渚嬨?BR>
hashCode()鏂規硶寰堝鎬紝涓ょBoolean鐨刪ash code鍒嗗埆鏄?231鍜?237銆備及璁″啓Boolean.java鐨勪漢瀵硅繖涓や釜鏁板瓧鏈夌壒鍒亸濂斤細

public int hashCode() {
    return value ? 1231 : 1237;
}

equals()鏂規硶涔熷緢綆鍗曪紝鍙湁Boolean綾誨瀷鐨凮bject騫朵笖value鐩哥瓑鎵嶈繑true錛?/P>

public boolean equals(Object obj) {
    if (obj instanceof Boolean) {
        return value == ((Boolean)obj).booleanValue();
    }
    return false;
}

欏轟究鎻愪竴鍙ワ細寰堝浜哄啓equals()鎬繪槸鍦ㄧ涓琛屽啓錛?BR>   if (obj==null) return false;
鍏跺疄瀹屽叏娌℃湁蹇呰錛屽洜涓哄鏋渙bj==null錛屼笅涓琛岀殑
    if (obj instanceof Type)
灝辮偗瀹氳繑鍥瀎alse錛屽洜涓?null instanceof AnyType) = false銆?BR>璇︾粏鍐呭璇峰弬鑰冦奅ffective Java銆嬬7鏉★細Obey the general contract when overriding equals銆?BR>
鍏朵粬鐨勬柟娉曞toString()灝辨洿綆鍗曚簡錛屽彧瑕佺◢寰啛鎮塲ava鐨勭▼搴忓憳鐩鎬俊閮借兘鍐欏嚭鏉ワ紝鎴戝氨涓嶅璇翠簡銆?BR>
鈽?/FONT> 鎬葷粨 鈽?/FONT>

1.濡傛灉涓涓被鍙湁鏈夐檺鐨勫嚑縐嶇姸鎬侊紝鑰冭檻鐢ㄥ嚑涓猣inal鐨勯潤鎬佸彉閲忔潵琛ㄧず涓嶅悓鐘舵佺殑瀹炰緥銆?BR>渚嬪緙栧啓涓涓猈eekday綾伙紝鐘舵佸彧鏈?涓紝灝變笉瑕佽鐢ㄦ埛鍐檔ew Weekday(1)錛岀洿鎺ユ彁渚沇eekday.MONDAY鍗沖彲銆?BR>
2.瑕侀槻姝㈢敤鎴蜂嬌鐢╪ew鐢熸垚瀹炰緥錛屽氨鍙栨秷public鏋勯犲嚱鏁幫紝鐢ㄦ埛瑕佽幏寰楅潤鎬佸疄渚嬬殑寮曠敤鏈変袱涓柟娉曪細濡傛灉鐢蟲槑public static var灝卞彲浠ョ洿鎺ヨ闂紝姣斿Boolean.TRUE錛?BR>絎簩涓柟娉曟槸閫氳繃闈欐佸伐鍘傛柟娉曪細Boolean.valueOf(?)

3.濡傛灉涓嶆彁渚沺ublic鏋勯犲嚱鏁幫紝璁╃敤鎴峰彧鑳介氳繃涓婇潰鐨勬柟娉曡幏寰楅潤鎬佸彉閲忕殑寮曠敤錛岃繕鍙互澶уぇ綆鍖杄quals()鏂規硶錛?BR>    public boolean equals(Object obj) {
        return this==obj;
    }
鍙互鐩存帴鐢?=姣旇緝寮曠敤錛岀粷瀵規病鏈夐棶棰橈紝鑰屼笖鏁堢巼鏈楂樸?BR>
4.涓轟粈涔圝DK鐨凚oolean娌℃湁瀹炵幇涓婇潰絎?鐐癸紵鍥犱負閭ｄ袱涓猻tatic鍙橀噺TRUE鍜孎ALSE鏄湪jdk 1.2浠ュ悗鎵嶆湁鐨勶紝鐢變簬鍓嶉潰鐨勭増鏈凡緇忔妸鏋勯犲嚱鏁扮敵鏄庝負public錛屾墍浠ヤ負浜嗕繚鎸佸鎴風浠ｇ爜鑳藉涓嶄慨鏀逛篃鍦ㄥ悗闈㈢殑鐗堟湰涓繍琛岋紝鍙ソ緇х畫鎻愪緵public鏋勯犲嚱鏁般?/P>

Xuefeng's Weblog 2005-12-02 10:35 鍙戣〃璇勮
]]>RMI璋冪敤妯＄増http://m.tkk7.com/asklxf/articles/22200.htmlXuefeng's WeblogXuefeng's WeblogFri, 02 Dec 2005 02:34:00 GMThttp://m.tkk7.com/asklxf/articles/22200.htmlhttp://m.tkk7.com/asklxf/comments/22200.htmlhttp://m.tkk7.com/asklxf/articles/22200.html#Feedback0http://m.tkk7.com/asklxf/comments/commentRss/22200.htmlhttp://m.tkk7.com/asklxf/services/trackbacks/22200.html1. 瀹氫箟榪滅▼鎺ュ彛 

// 榪滅▼鎺ュ彛緇ф壙鑷?/SPAN>Remote

// 榪滅▼鏂規硶鐨勪紶鍏ュ弬鏁板拰榪斿洖鍊煎繀欏繪槸鑷劧綾誨瀷錛?/SPAN>int錛?/SPAN>float錛?/SPAN>boolean絳夛級

// 鎴栬呭疄鐜頒簡Serializable鎴?/SPAN>Remote鎺ュ彛鐨勫璞°?/SPAN>

public interface Time extends java.rmi.Remote {

    // 榪滅▼鏂規硶蹇呴』鎶涘嚭RemoteException錛?/SPAN>

    public String getTime() throws RemoteException;

}

 

2. 瀹氫箟瀹炵幇綾?/SPAN> 

// 娉ㄦ剰錛氬疄鐜扮被緇ф壙鑷?/SPAN>UnicastRemoteObject鍜岃嚜瀹氫箟鐨勮繙紼嬫帴鍙?/SPAN>Time錛?/SPAN>

public class TimeImpl extends java.rmi.server.UnicastRemoteObject implements Time {

    // 娉ㄦ剰錛氱敱浜?/SPAN>RemoteObject鏋勯犲嚱鏁拌鎶涘嚭RemoteException錛?/SPAN>

    // 鍥犳鍔″繀瀹氫箟鏋勯犲嚱鏁板茍鎶涘嚭RemoteException錛?/SPAN>

    public TimeImpl() throws RemoteException { super(); }

 

    // 榪欓噷鏄繙紼嬫柟娉曪細

    public String getTime() throws RemoteException {

        return "12:04:27";

    }

 

    // 鍚姩鏈嶅姟錛?/SPAN>

    public static void main(String[] args) throws Exception {

        // 鍙互鎵嬪姩鍚姩RMI Registry錛屼篃鍙互鍦ㄧ▼搴忎腑鍚姩錛?/SPAN>

        java.rmi.registry.LocateRegistry.createRegistry(1099);

        // 緇戝畾鍚嶅瓧鏈嶅姟錛屽湴鍧鏄湰鍦拌綆楁満鍚嶆垨鏈満IP錛岄粯璁ょ鍙ｆ槸1099錛?/SPAN>

        java.rmi.Naming.bind("http://localhost:1099/servicename", new TimeImpl());

        // 濡傛灉娌℃湁寮傚父鎶涘嚭錛屽垯緇戝畾鎴愬姛銆?/SPAN>

        // 濡傛灉鍚嶅瓧宸茬粡琚粦瀹氾紝鍙互鐢?/SPAN>Naming.rebind()鏇挎崲鎺夊凡緇戝畾鐨勬湇鍔°?/SPAN>

    }

}

 

3. 緙栬瘧鐢熸垚妗╁拰妗嗘灦 

榪愯rmic TimeImpl錛岀敓鎴?/SPAN>TimeImpl_Skel.class鍜?/SPAN>TimeImpl_Stub.class銆?/SPAN>

 

4. 瀹㈡埛绔?/SPAN>

// 瀹㈡埛绔枃浠跺寘鍚鎴風浠ｇ爜Client.class錛岃繙紼嬫帴鍙?/SPAN>Time.class錛?/SPAN>

// 鐢?/SPAN>rmic鐢熸垚鐨勬敮鎸佺被TimeImpl_Skel.class鍜?/SPAN>TimeImpl_Stub.class錛?/SPAN>

public static void main(String[] args) throws Exception {

    // 瀹㈡埛绔氳繃IP寮曠敤鏈嶅姟鍣ㄧ鐨勮繙紼嬪璞★紝鍥犳鍙互鍔ㄦ侀夋嫨鏈嶅姟鍣ㄣ?/SPAN>

    // 濡傛灉涓嶆寚瀹氱鍙ｏ紝榛樿绔彛鍙鋒槸1099錛?/SPAN>

    Time time = (Time)java.rmi.Naming.lookup("http://localhost:1099/servicename");

    System.out.println(time.getTime());

}



]]>緇嗚Java涔媢til綾?/title><link>http://m.tkk7.com/asklxf/articles/22195.html</link><dc:creator>Xuefeng's Weblog</dc:creator><author>Xuefeng's Weblog</author><pubDate>Fri, 02 Dec 2005 02:29:00 GMT</pubDate><guid>http://m.tkk7.com/asklxf/articles/22195.html</guid><wfw:comment>http://m.tkk7.com/asklxf/comments/22195.html</wfw:comment><comments>http://m.tkk7.com/asklxf/articles/22195.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://m.tkk7.com/asklxf/comments/commentRss/22195.html</wfw:commentRss><trackback:ping>http://m.tkk7.com/asklxf/services/trackbacks/22195.html</trackback:ping><description><![CDATA[<P>銆銆綰挎ц〃錛岄摼琛紝鍝堝笇琛ㄦ槸甯哥敤鐨勬暟鎹粨鏋勶紝鍦ㄨ繘琛孞ava寮鍙戞椂錛孞DK宸茬粡涓烘垜浠彁渚涗簡涓緋誨垪鐩稿簲鐨勭被鏉ュ疄鐜板熀鏈殑鏁版嵁緇撴瀯銆傝繖浜涚被鍧囧湪java.util鍖呬腑銆傛湰鏂囪瘯鍥鵑氳繃綆鍗曠殑鎻忚堪錛屽悜璇昏呴槓榪板悇涓被鐨勪綔鐢ㄤ互鍙婂浣曟紜嬌鐢ㄨ繖浜涚被銆?</P> <P><EM>Collection</EM><BR>鈹?EM>List</EM><BR>鈹傗敎LinkedList<BR>鈹傗敎ArrayList<BR>鈹傗敂Vector<BR>鈹傘鈹擲tack<BR>鈹?EM>Set</EM><BR><EM>Map</EM><BR>鈹淗ashtable<BR>鈹淗ashMap<BR>鈹擶eakHashMap</P> <P><STRONG><FONT color=#0000ff>Collection鎺ュ彛</FONT></STRONG><BR>銆銆Collection鏄渶鍩烘湰鐨勯泦鍚堟帴鍙ｏ紝涓涓狢ollection浠ｈ〃涓緇凮bject錛屽嵆Collection鐨勫厓绱狅紙Elements錛夈備竴浜汣ollection鍏佽鐩稿悓鐨勫厓绱犺屽彟涓浜涗笉琛屻備竴浜涜兘鎺掑簭鑰屽彟涓浜涗笉琛屻侸ava SDK涓嶆彁渚涚洿鎺ョ戶鎵胯嚜Collection鐨勭被錛孞ava SDK鎻愪緵鐨勭被閮芥槸緇ф壙鑷狢ollection鐨勨滃瓙鎺ュ彛鈥濆List鍜孲et銆?BR>銆銆鎵鏈夊疄鐜癈ollection鎺ュ彛鐨勭被閮藉繀欏繪彁渚涗袱涓爣鍑嗙殑鏋勯犲嚱鏁幫細鏃犲弬鏁扮殑鏋勯犲嚱鏁扮敤浜庡垱寤轟竴涓┖鐨凜ollection錛屾湁涓涓狢ollection鍙傛暟鐨勬瀯閫犲嚱鏁扮敤浜庡垱寤轟竴涓柊鐨凜ollection錛岃繖涓柊鐨凜ollection涓庝紶鍏ョ殑Collection鏈夌浉鍚岀殑鍏冪礌銆傚悗涓涓瀯閫犲嚱鏁板厑璁哥敤鎴峰鍒朵竴涓狢ollection銆?BR>銆銆濡備綍閬嶅巻Collection涓殑姣忎竴涓厓绱狅紵涓嶈Collection鐨勫疄闄呯被鍨嬪浣曪紝瀹冮兘鏀寔涓涓猧terator()鐨勬柟娉曪紝璇ユ柟娉曡繑鍥炰竴涓凱浠ｅ瓙錛屼嬌鐢ㄨ榪唬瀛愬嵆鍙愪竴璁塊棶Collection涓瘡涓涓厓绱犮傚吀鍨嬬殑鐢ㄦ硶濡備笅錛?BR><FONT face="Courier New" color=#336666>銆銆銆銆Iterator it = collection.iterator(); // 鑾峰緱涓涓凱浠ｅ瓙<BR>銆銆銆銆while(it.hasNext()) {<BR>銆銆銆銆銆銆Object obj = it.next(); // 寰楀埌涓嬩竴涓厓绱?BR>銆銆銆銆}</FONT><BR>銆銆鐢盋ollection鎺ュ彛媧劇敓鐨勪袱涓帴鍙ｆ槸List鍜孲et銆?/P> <P><FONT color=#0000ff><STRONG>List鎺ュ彛</STRONG></FONT><BR>銆銆List鏄湁搴忕殑Collection錛屼嬌鐢ㄦ鎺ュ彛鑳藉綺劇‘鐨勬帶鍒舵瘡涓厓绱犳彃鍏ョ殑浣嶇疆銆傜敤鎴瘋兘澶熶嬌鐢ㄧ儲寮曪紙鍏冪礌鍦↙ist涓殑浣嶇疆錛岀被浼間簬鏁扮粍涓嬫爣錛夋潵璁塊棶List涓殑鍏冪礌錛岃繖綾諱技浜嶫ava鐨勬暟緇勩?BR>鍜屼笅闈㈣鎻愬埌鐨凷et涓嶅悓錛孡ist鍏佽鏈夌浉鍚岀殑鍏冪礌銆?BR>銆銆闄や簡鍏鋒湁Collection鎺ュ彛蹇呭鐨刬terator()鏂規硶澶栵紝List榪樻彁渚涗竴涓猯istIterator()鏂規硶錛岃繑鍥炰竴涓狶istIterator鎺ュ彛錛屽拰鏍囧噯鐨処terator鎺ュ彛鐩告瘮錛孡istIterator澶氫簡涓浜沘dd()涔嬬被鐨勬柟娉曪紝鍏佽娣誨姞錛屽垹闄わ紝璁懼畾鍏冪礌錛岃繕鑳藉悜鍓嶆垨鍚戝悗閬嶅巻銆?BR>銆銆瀹炵幇List鎺ュ彛鐨勫父鐢ㄧ被鏈塋inkedList錛孉rrayList錛孷ector鍜孲tack銆?/P> <P><FONT color=#0000ff><STRONG>LinkedList綾?/STRONG></FONT><BR>銆銆LinkedList瀹炵幇浜哃ist鎺ュ彛錛屽厑璁竛ull鍏冪礌銆傛澶朙inkedList鎻愪緵棰濆鐨刧et錛宺emove錛宨nsert鏂規硶鍦↙inkedList鐨勯閮ㄦ垨灝鵑儴銆傝繖浜涙搷浣滀嬌LinkedList鍙鐢ㄤ綔鍫嗘爤錛坰tack錛夛紝闃熷垪錛坬ueue錛夋垨鍙屽悜闃熷垪錛坉eque錛夈?BR>銆銆娉ㄦ剰LinkedList娌℃湁鍚屾鏂規硶銆傚鏋滃涓嚎紼嬪悓鏃惰闂竴涓狶ist錛屽垯蹇呴』鑷繁瀹炵幇璁塊棶鍚屾銆備竴縐嶈В鍐蟲柟娉曟槸鍦ㄥ垱寤篖ist鏃舵瀯閫犱竴涓悓姝ョ殑List錛?BR><FONT face="Courier New" color=#336666>銆銆銆銆List list = Collections.synchronizedList(new LinkedList(...));</FONT></P> <P><FONT color=#0000ff><STRONG>ArrayList綾?/STRONG></FONT><BR>銆銆ArrayList瀹炵幇浜嗗彲鍙樺ぇ灝忕殑鏁扮粍銆傚畠鍏佽鎵鏈夊厓绱狅紝鍖呮嫭null銆侫rrayList娌℃湁鍚屾銆?BR>size錛宨sEmpty錛実et錛宻et鏂規硶榪愯鏃墮棿涓哄父鏁般備絾鏄痑dd鏂規硶寮閿涓哄垎鎽婄殑甯告暟錛屾坊鍔爊涓厓绱犻渶瑕丱(n)鐨勬椂闂淬傚叾浠栫殑鏂規硶榪愯鏃墮棿涓虹嚎鎬с?BR>銆銆姣忎釜ArrayList瀹炰緥閮芥湁涓涓閲忥紙Capacity錛夛紝鍗崇敤浜庡瓨鍌ㄥ厓绱犵殑鏁扮粍鐨勫ぇ灝忋傝繖涓閲忓彲闅忕潃涓嶆柇娣誨姞鏂板厓绱犺岃嚜鍔ㄥ鍔狅紝浣嗘槸澧為暱綆楁硶騫舵病鏈夊畾涔夈傚綋闇瑕佹彃鍏ュぇ閲忓厓绱犳椂錛屽湪鎻掑叆鍓嶅彲浠ヨ皟鐢╡nsureCapacity鏂規硶鏉ュ鍔燗rrayList鐨勫閲忎互鎻愰珮鎻掑叆鏁堢巼銆?BR>銆銆鍜孡inkedList涓鏍鳳紝ArrayList涔熸槸闈炲悓姝ョ殑錛坲nsynchronized錛夈?/P> <P><FONT color=#0000ff><STRONG>Vector綾?/STRONG></FONT><BR>銆銆Vector闈炲父綾諱技ArrayList錛屼絾鏄疺ector鏄悓姝ョ殑銆傜敱Vector鍒涘緩鐨処terator錛岃櫧鐒跺拰ArrayList鍒涘緩鐨処terator鏄悓涓鎺ュ彛錛屼絾鏄紝鍥犱負Vector鏄悓姝ョ殑錛屽綋涓涓狪terator琚垱寤鴻屼笖姝ｅ湪琚嬌鐢紝鍙︿竴涓嚎紼嬫敼鍙樹簡Vector鐨勭姸鎬侊紙渚嬪錛屾坊鍔犳垨鍒犻櫎浜嗕竴浜涘厓绱狅級錛岃繖鏃惰皟鐢↖terator鐨勬柟娉曟椂灝嗘姏鍑篊oncurrentModificationException錛屽洜姝ゅ繀欏繪崟鑾瘋寮傚父銆?/P> <P><STRONG><FONT color=#0000ff>Stack 綾?/FONT></STRONG><BR>銆銆Stack緇ф壙鑷猇ector錛屽疄鐜頒竴涓悗榪涘厛鍑虹殑鍫嗘爤銆係tack鎻愪緵5涓澶栫殑鏂規硶浣垮緱Vector寰椾互琚綋浣滃爢鏍堜嬌鐢ㄣ傚熀鏈殑push鍜宲op鏂規硶錛岃繕鏈塸eek鏂規硶寰楀埌鏍堥《鐨勫厓绱狅紝empty鏂規硶嫻嬭瘯鍫嗘爤鏄惁涓虹┖錛宻earch鏂規硶媯嫻嬩竴涓厓绱犲湪鍫嗘爤涓殑浣嶇疆銆係tack鍒氬垱寤哄悗鏄┖鏍堛?/P> <P><FONT color=#0000ff><STRONG>Set鎺ュ彛</STRONG></FONT><BR>銆銆Set鏄竴縐嶄笉鍖呭惈閲嶅鐨勫厓绱犵殑Collection錛屽嵆浠繪剰鐨勪袱涓厓绱爀1鍜宔2閮芥湁e1.equals(e2)=false錛孲et鏈澶氭湁涓涓猲ull鍏冪礌銆?BR>銆銆寰堟槑鏄撅紝Set鐨勬瀯閫犲嚱鏁版湁涓涓害鏉熸潯浠訛紝浼犲叆鐨凜ollection鍙傛暟涓嶈兘鍖呭惈閲嶅鐨勫厓绱犮?BR>銆銆璇鋒敞鎰忥細蹇呴』灝忓績鎿嶄綔鍙彉瀵硅薄錛圡utable Object錛夈傚鏋滀竴涓猄et涓殑鍙彉鍏冪礌鏀瑰彉浜嗚嚜韜姸鎬佸鑷碠bject.equals(Object)=true灝嗗鑷翠竴浜涢棶棰樸?/P> <P><FONT color=#0000ff><STRONG>Map鎺ュ彛</STRONG></FONT><BR>銆銆璇鋒敞鎰忥紝Map娌℃湁緇ф壙Collection鎺ュ彛錛孧ap鎻愪緵key鍒皏alue鐨勬槧灝勩備竴涓狹ap涓笉鑳藉寘鍚浉鍚岀殑key錛屾瘡涓猭ey鍙兘鏄犲皠涓涓獀alue銆侻ap鎺ュ彛鎻愪緵3縐嶉泦鍚堢殑瑙嗗浘錛孧ap鐨勫唴瀹瑰彲浠ヨ褰撲綔涓緇刱ey闆嗗悎錛屼竴緇剉alue闆嗗悎錛屾垨鑰呬竴緇刱ey-value鏄犲皠銆?/P> <P><FONT color=#0000ff><STRONG>Hashtable綾?/STRONG></FONT><BR>銆銆Hashtable緇ф壙Map鎺ュ彛錛屽疄鐜頒竴涓猭ey-value鏄犲皠鐨勫搱甯岃〃銆備換浣曢潪絀猴紙non-null錛夌殑瀵硅薄閮藉彲浣滀負key鎴栬卾alue銆?BR>銆銆娣誨姞鏁版嵁浣跨敤put(key, value)錛屽彇鍑烘暟鎹嬌鐢╣et(key)錛岃繖涓や釜鍩烘湰鎿嶄綔鐨勬椂闂村紑閿涓哄父鏁般?BR>Hashtable閫氳繃initial capacity鍜宭oad factor涓や釜鍙傛暟璋冩暣鎬ц兘銆傞氬父緙虹渷鐨刲oad factor 0.75杈冨ソ鍦板疄鐜頒簡鏃墮棿鍜岀┖闂寸殑鍧囪　銆傚澶oad factor鍙互鑺傜渷絀洪棿浣嗙浉搴旂殑鏌ユ壘鏃墮棿灝嗗澶э紝榪欎細褰卞搷鍍廹et鍜宲ut榪欐牱鐨勬搷浣溿?BR>浣跨敤Hashtable鐨勭畝鍗曠ず渚嬪涓嬶紝灝?錛?錛?鏀懼埌Hashtable涓紝浠栦滑鐨刱ey鍒嗗埆鏄漮ne鈥濓紝鈥漷wo鈥濓紝鈥漷hree鈥濓細<BR><FONT face="Courier New" color=#336666>銆銆銆銆Hashtable numbers = new Hashtable();<BR>銆銆銆銆numbers.put(鈥渙ne鈥? new Integer(1));<BR>銆銆銆銆numbers.put(鈥渢wo鈥? new Integer(2));<BR>銆銆銆銆numbers.put(鈥渢hree鈥? new Integer(3));</FONT><BR>銆銆瑕佸彇鍑轟竴涓暟錛屾瘮濡?錛岀敤鐩稿簲鐨刱ey錛?BR><FONT face="Courier New" color=#336666>銆銆銆銆Integer n = (Integer)numbers.get(鈥渢wo鈥?;<BR>銆銆銆銆System.out.println(鈥渢wo = 鈥?+ n);</FONT><BR>銆銆鐢變簬浣滀負key鐨勫璞″皢閫氳繃璁＄畻鍏舵暎鍒楀嚱鏁版潵紜畾涓庝箣瀵瑰簲鐨剉alue鐨勪綅緗紝鍥犳浠諱綍浣滀負key鐨勫璞￠兘蹇呴』瀹炵幇hashCode鍜宔quals鏂規硶銆俬ashCode鍜宔quals鏂規硶緇ф壙鑷牴綾籓bject錛屽鏋滀綘鐢ㄨ嚜瀹氫箟鐨勭被褰撲綔key鐨勮瘽錛岃鐩稿綋灝忓績錛屾寜鐓ф暎鍒楀嚱鏁扮殑瀹氫箟錛屽鏋滀袱涓璞＄浉鍚岋紝鍗硂bj1.equals(obj2)=true錛屽垯瀹冧滑鐨刪ashCode蹇呴』鐩稿悓錛屼絾濡傛灉涓や釜瀵硅薄涓嶅悓錛屽垯瀹冧滑鐨刪ashCode涓嶄竴瀹氫笉鍚岋紝濡傛灉涓や釜涓嶅悓瀵硅薄鐨刪ashCode鐩稿悓錛岃繖縐嶇幇璞＄О涓哄啿紿侊紝鍐茬獊浼氬鑷存搷浣滃搱甯岃〃鐨勬椂闂村紑閿澧炲ぇ錛屾墍浠ュ敖閲忓畾涔夊ソ鐨刪ashCode()鏂規硶錛岃兘鍔犲揩鍝堝笇琛ㄧ殑鎿嶄綔銆?BR>銆銆濡傛灉鐩稿悓鐨勫璞℃湁涓嶅悓鐨刪ashCode錛屽鍝堝笇琛ㄧ殑鎿嶄綔浼氬嚭鐜版剰鎯充笉鍒扮殑緇撴灉錛堟湡寰呯殑get鏂規硶榪斿洖null錛夛紝瑕侀伩鍏嶈繖縐嶉棶棰橈紝鍙渶瑕佺墷璁頒竴鏉★細瑕佸悓鏃跺鍐檈quals鏂規硶鍜宧ashCode鏂規硶錛岃屼笉瑕佸彧鍐欏叾涓竴涓?BR>銆銆Hashtable鏄悓姝ョ殑銆?/P> <P><STRONG><FONT color=#0000ff>HashMap綾?/FONT></STRONG><BR>銆銆HashMap鍜孒ashtable綾諱技錛屼笉鍚屼箣澶勫湪浜嶩ashMap鏄潪鍚屾鐨勶紝騫朵笖鍏佽null錛屽嵆null value鍜宯ull key銆傦紝浣嗘槸灝咹ashMap瑙嗕負Collection鏃訛紙values()鏂規硶鍙繑鍥濩ollection錛夛紝鍏惰凱浠ｅ瓙鎿嶄綔鏃墮棿寮閿鍜孒ashMap鐨勫閲忔垚姣斾緥銆傚洜姝わ紝濡傛灉榪唬鎿嶄綔鐨勬ц兘鐩稿綋閲嶈鐨勮瘽錛屼笉瑕佸皢HashMap鐨勫垵濮嬪寲瀹歸噺璁懼緱榪囬珮錛屾垨鑰卨oad factor榪囦綆銆?/P> <P><FONT color=#0000ff><STRONG>WeakHashMap綾?/STRONG></FONT><BR>銆銆WeakHashMap鏄竴縐嶆敼榪涚殑HashMap錛屽畠瀵筴ey瀹炶鈥滃急寮曠敤鈥濓紝濡傛灉涓涓猭ey涓嶅啀琚閮ㄦ墍寮曠敤錛岄偅涔堣key鍙互琚獹C鍥炴敹銆?/P> <P><FONT color=#ff0000><STRONG>鎬葷粨</STRONG></FONT><BR>銆銆濡傛灉娑夊強鍒板爢鏍堬紝闃熷垪絳夋搷浣滐紝搴旇鑰冭檻鐢↙ist錛屽浜庨渶瑕佸揩閫熸彃鍏ワ紝鍒犻櫎鍏冪礌錛屽簲璇ヤ嬌鐢↙inkedList錛屽鏋滈渶瑕佸揩閫熼殢鏈鴻闂厓绱狅紝搴旇浣跨敤ArrayList銆?BR>銆銆濡傛灉紼嬪簭鍦ㄥ崟綰跨▼鐜涓紝鎴栬呰闂粎浠呭湪涓涓嚎紼嬩腑榪涜錛岃冭檻闈炲悓姝ョ殑綾伙紝鍏舵晥鐜囪緝楂橈紝濡傛灉澶氫釜綰跨▼鍙兘鍚屾椂鎿嶄綔涓涓被錛屽簲璇ヤ嬌鐢ㄥ悓姝ョ殑綾匯?BR>銆銆瑕佺壒鍒敞鎰忓鍝堝笇琛ㄧ殑鎿嶄綔錛屼綔涓簁ey鐨勫璞¤姝ｇ‘澶嶅啓equals鍜宧ashCode鏂規硶銆?BR>銆銆灝介噺榪斿洖鎺ュ彛鑰岄潪瀹為檯鐨勭被鍨嬶紝濡傝繑鍥濴ist鑰岄潪ArrayList錛岃繖鏍峰鏋滀互鍚庨渶瑕佸皢ArrayList鎹㈡垚LinkedList鏃訛紝瀹㈡埛绔唬鐮佷笉鐢ㄦ敼鍙樸傝繖灝辨槸閽堝鎶借薄緙栫▼銆?/P> <P align=right>錛堝弬鑰冿細Sun JDK1.4.1 API DOC錛?/P><img src ="http://m.tkk7.com/asklxf/aggbug/22195.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://m.tkk7.com/asklxf/" target="_blank">Xuefeng's Weblog</a> 2005-12-02 10:29 <a href="http://m.tkk7.com/asklxf/articles/22195.html#Feedback" target="_blank" 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