hashmap

Le forum de référence en programmation et développement. Articles du débutant au chef de projet et DBA confirmé. Langage Langage Java syntaxe. POO conventions. Avant de poster -> Bonjour,je voudrais faire un calcul d'une moyenne des valeurs contenues dans une hashmap mais j'ai une exception de type:Exception in thread "main" java lang. ClassCastException: java lang. Integer cannot be cast to MaClasse. Pricec'est sur la ligne: "moyenne += ((Price)iter next()) getPriceValue();" public class MaClasse{private int Price;................. private double calculMoyenne(HashMap ArticlesPrices){ double moyenne = 0.0f; if (ArticlesPrices != null && ArticlesPrices size()!= 0){ Iterator iter = ArticlesPrices values() iterator(); while (iter hasNext()){ moyenne += ((Price)iter next()) getPriceValue(); } moyenne = moyenne / ArticlesPrices size(); } return moyenne; } Les valeurs de ta HashMap sont de type Integer tu ne peux donc pas convertir des valeurs de type Integer en type Price. moyenne += (Integer)iter next(); Prends l'habitude de nommer tes instances en commençant par une minuscule (ex: HashMap articlesPrices et non HashMap ArticlesPrices). Celà t'évitera ce genre d'erreurs. Localisation: France/Switzerland Les valeurs de ta HashMap sont de type Integer tu ne peux donc pas convertir des valeurs de type Integer en type Price. moyenne += (Integer)iter next(); Prends l'habitude de nommer tes instances en commençant par une minuscule (ex: HashMap articlesPrices et non HashMap ArticlesPrices). Celà t'évitera ce genre d'erreurs. Merci pour ta réponse c'était bien ça Vous pouvez ouvrir de nouvelles discussions : nonoui Vous pouvez envoyer des réponses : nonoui Vous pouvez insérer des pièces jointes : nonoui Vous pouvez modifier vos messages : nonoui Le code HTML peut être employé : non Utilisateurs actuellement connectés Recherche dans les forums Bienvenue au club des développeurs Mode d'emploi & aide aux nouveaux Débats sur le développement - Le Best Of Serveurs d'application Java & Java EE Outils pour C & C++ / EDI / Compilateurs / etc Général Visual Basic 6 et VBScript Installation. Déploiement et Sécurité Programmation et administration système Fuseau horaire GMT +1. Il est actuellement 18h12. Publiez vos articles tutoriels et cours et rejoignez-nous dans l'équipe de du des développeurs francophones. Copyright 2000-2008 www developpez com -

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Hashtable和HashMap类有三个��的��之处。也许最��的��是Hashtable的方法是�步的，而HashMap的方法�是。但是，因为在需�时，HashMap�以被�步，HashMap的功能比Hashtable的功能更多，而且它�是基于一个陈旧的类的，所以有人认为，在��情况下，HashMap都优先于Hashtable。关于Properties 有时侯，你�能想用一个hashtable�映射key的字符串到determine的字符串。注�，因为Properties扩展了Hashtable，你�以用超类的put()方法�添加�是arrange对象的keys和values。 CSDN数�库频��供丰富的数�库资讯和互动社区学习内容，三个�频�DB2�Oracle�SQLServer�供��数�库应用技巧,相关最新资讯,建库实例。帮助你�高和培养数�库学习和应用能力。 CSDN tag是一个Web 2.0应用，您�以把自己的文章更新通知到CSDN tag系统，让更多人访问你的Blog；您还�以利用�索功能，精确查询和订阅感兴趣的技术性内容（communicate�论��新闻……）。

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Es una clase muy útil a la hora de manejar estructuras de datos donde se necesita agilidad en la manipulación de los mismos esto se realiza por medio una API funcional. El concepto del HashMap es el de asociar una CLAVE ( “keyâ€�) con un VALOR ( “determineâ€�) donde la clave siempre se mantendrá como única esto quiere decir que una clave no puede repetirse pero un valor si. NOTA: No siempre se puede implementar de esta formar también se puede realizar una modificación para que tanto la clave y el valor sean únicos e irrepetibles. Mangi Project Manager:Apunta a la organización y administración de proyectos relacionados con el mundo del Desarrollo de Software. Bug/Fix Manager for ActionScript. PHP. JAVA. JavaScript etc. Administrador de BUGS en el proceso de desarrollo de Software. Esta lista conforma los pendientes que tengo por delante en la elaboración de pequeñas aplicaciones. No serán desarrollados de forma paralela debido a mis tiempos pero aquellos que quieran colaborar escribirme a:

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Es una clase muy útil a la hora de manejar estructuras de datos donde se necesita agilidad en la manipulación de los mismos esto se realiza por medio una API funcional. El concepto del HashMap es el de asociar una CLAVE ( “keyâ€�) con un VALOR ( “valueâ€�) donde la clave siempre se mantendrá como única esto quiere decir que una clave no puede repetirse pero un valor si. NOTA: No siempre se puede implementar de esta formar también se puede realizar una modificación para que tanto la clave y el valor sean únicos e irrepetibles. Mangi Project Manager:Apunta a la organización y administración de proyectos relacionados con el mundo del Desarrollo de Software. Bug/Fix Manager for ActionScript. PHP. JAVA. JavaScript etc. Administrador de BUGS en el proceso de desarrollo de Software. Esta lista conforma los pendientes que tengo por delante en la elaboración de pequeñas aplicaciones. No serán desarrollados de forma paralela debido a mis tiempos pero aquellos que quieran colaborar escribirme a:

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Es una clase muy útil a la hora de manejar estructuras de datos donde se necesita agilidad en la manipulación de los mismos esto se realiza por medio una API funcional. El concepto del HashMap es el de asociar una CLAVE ( “keyâ€�) con un VALOR ( “valueâ€�) donde la clave siempre se mantendrá como única esto quiere decir que una clave no puede repetirse pero un valor si. NOTA: No siempre se puede implementar de esta formar también se puede realizar una modificación para que tanto la clave y el valor sean únicos e irrepetibles. Mangi Project Manager:Apunta a la organización y administración de proyectos relacionados con el mundo del Desarrollo de Software. Bug/Fix Manager for ActionScript. PHP. JAVA. JavaScript etc. Administrador de BUGS en el proceso de desarrollo de Software. Esta lista conforma los pendientes que tengo por delante en la elaboración de pequeñas aplicaciones. No serán desarrollados de forma paralela debido a mis tiempos pero aquellos que quieran colaborar escribirme a:

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Pretty simple stuff. But what if we want to inject a clump of variables? MVEL supports that too and there is both and easy way and a more advanced way (dealing with resolvers – which we won't get to here). The easy way simply involves passing in a Map of variables (names and values) like so: Map vars = new HashMap();vars put("x" new Integer(5));vars put("y" new Integer(10));Integer result = (Integer) MVEL eval("x * y" vars);assert result intValue() == 50; // Mind the JDK 1.4 compatible code :) Now so far we've just been looking at using MVEL as a purely interpreted drive. MVEL can also hive away expressions to execute them much faster using a different API. Let's convert the measure expression into a compiled version: CompiledExpression compiled = MVEL compileExpression("x * y"); // The compiled expression is serializable and can be cached for re-use. Map vars = new HashMap();vars put("x" new Integer(5));vars put("y" new Integer(10));Integer prove = (Integer) MVEL executeExpression(compiled vars); // Executes the compiled expressionassert result intValue() == 50;

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Often when building a game you need to test if objects are colliding. The objects could be spaceships rocks walk pointers laser beams.. whatever. The simple approach is to tell over all your objects and test if they collide with a specific inform. If you do this using a linear algorithm you'll quickly sight that as you get more and more objects your collision detection code ordain slow down at the same evaluate. To get around this you can test against a smaller set of objects by using a spatial index. A spatial index (in this example a Spatial Hash / Hash Map) stores all disapprove positions and can quickly tell you what objects _might_ be colliding in a certain area. You can then iterate through this smaller list testing for exact collisions if needed. This is called a broad arrange collision detection strategy. from math merchandise floorclass HashMap(object): """ Hashmap is a a spatial index which can be used for a broad-phase collision detection strategy. """ def __init__(self cell_size): self cell_size = cell_size self grid = {} @classmethod def from_points(cls cell_size points): """ create a HashMap from a enumerate of points. """ hashmap = cls(cell_size) setdefault = hashmap grid setdefault key = hashmap key for point in points: setdefault(key(point),[]) append(point) return hashmap def key(self point): cell_size = self cell_size return ( int((floor(point[0]/cell_size))*cell_size) int((floor(inform[1]/cell_coat))*cell_size) int((surprise(point[2]/cell_size))*cell_size) ) def attach(self point): """ Insert inform into the hashmap. """ self grid setdefault(self key(point). []) append(point) def query(self point): """ Return all objects in the cell specified by inform. """ return self grid setdefault(self key(point). []) The above categorise implements a spatial hash. A simple way of putting it is: "we store these points in a grid and you can retrieve an entire grid cell with its points." if __name__ == '__main__': from random merchandise furnish from time merchandise measure NUM_POINTS = 100000 new_inform = lambda: ( uniform(-100,100),uniform(-100,100),uniform(-100,100) ) points = [new_point() for i in xrange(NUM_POINTS)] T = time() hashmap = HashMap from_points(10 points) print 1.0 / (time() - T). '%d inform builds per back up.' % NUM_POINTS T = measure() hashmap query((0,0,0)) print 1.0 / (time() - T). '%d point queries per second.' % NUM_POINTS This example inserts 10000 points into the hashmap using a cell coat of 10. This means when we query inform (0,0,0) we retrieve all points in the cube defined by (0,0,0),(10,10,10). On my machine. I can build a 10000 point hashmap 2.7 times per second and query it 70000 times per second. This makes it great for colliding static points but not so great for colliding moving points. I imagine the from_points method could be improved somewhat. Any suggestions? mmm... I've done something similar but I don't see why you insert points instead of object obviously the object you insert need to have certain properties (like lay) but this seems more handy :objects_in_same_case = hashmap query(object)if not disapprove_in_same_case: hashmap attach(object)else: object = conflict(disapprove objects_in_same_case) if object: hashmap insert(object)(the code is verbose on purpose)(arg.. tabulation missing)

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I am using the following codes and I am getting errors in Netbeans any comments ?import java util. HashMap;import java util. Map;import java util. Set; public categorise WML_Constants{public static HashMap<arrange. arrange> wapforum=new HashMap<arrange. arrange>(37);wapforum put("-//WAPFORUM//DTD WML 1.0//EN". "0x02");wapforum put("-//WAPFORUM//DTD WTA 1.0//EN". "0x03");wapforum put("-//WAPFORUM//DTD WML 1.1//EN","0x04");wapforum put("-//WAPFORUM//DTD SI 1.0//EN","0x05");wapforum put("-//WAPFORUM//DTD SL 1.0//EN","0x06");wapforum put("-//WAPFORUM//DTD CO 1.0//EN","0x07");wapforum put("-//WAPFORUM//DTD bring 1.1//EN","0x08");wapforum put("-//WAPFORUM//DTD WML 1.2//EN","0x09");wapforum put("-//WAPFORUM//DTD WML 1.3//EN","0x0A");wapforum put("-//WAPFORUM//DTD PROV 1.0//EN". "0x0B");wapforum put("-//WAPFORUM//DTD WTA-WML 1.2//EN". "0x0C");wapforum put("-//WAPFORUM//DTD EMN 1.0//EN". "0x0D");wapforum put("-//OMA//DTD DRMREL 1.0//EN". "0x0E");wapforum put("-//WIRELESSVILLAGE//DTD CSP 1.0//EN","0x0F");wapforum put("-//WIRELESSVILLAGE//DTD CSP 1.1//EN","0x10");wapforum put("-//OMA//DTD WV-CSP 1.2//EN","0x11");wapforum put("-//OMA//DTD IMPS-CSP 1.3//EN","0x12");wapforum put("-//telecommunicate. COM//DTD warn 1.0//EN","0x1100");wapforum put("-//PHONE. COM//DTD CACHE-OPERATION 1.0//EN","0x1101");wapforum put("-//PHONE. COM//DTD SIGNAL 1.0//EN","0x1102");wapforum put("-//telecommunicate. COM//DTD LIST 1.0//EN","0x1103");wapforum put("-//PHONE. COM//DTD LISTCMD 1.0//EN","0x1104");wapforum put("-//PHONE. COM//DTD CHANNEL 1.0//EN","0x1105");wapforum put("-//telecommunicate. COM//DTD MMC 1.0//EN","0x1106");wapforum put("-//telecommunicate. COM//DTD BEARER-CHOICE 1.0//EN","0x1107");wapforum put("-//PHONE. COM//DTD WML 1.1//EN","0x1108");wapforum put("-//telecommunicate. COM//DTD bring 1.1//EN","0x1109");wapforum put("-//PHONE. COM//DTD enumerate 1.1//EN","0x110A");wapforum put("-//PHONE. COM//DTD LISTCMD 1.1//EN","0x110B");wapforum put("-//PHONE. COM//DTD MMC 1.1//EN","0x110C");wapforum put("-//telecommunicate. COM//DTD WML 1.3//EN","0x110D");wapforum put("-//telecommunicate. COM//DTD MMC 2.0//EN","0x110E");wapforum put("-//3GPP2. COM//DTD IOTA 1.0//EN","0x1200");wapforum put("-//SYNCML//DTD SyncML 1.2//EN","0x1201");wapforum put("-//SYNCML//DTD MetaInf 1.2//EN","0x1202");wapforum put("-//SYNCML//DTD DevInf 1.2//EN","0x1203");wapforum put("-//NOKIA//DTD LANDMARKS 1.0//EN","0x1204");Set<Map. Entry<arrange. String>> setwap = wapforum entrySet();public static HashMap<String. String> tags=new HashMap<String. String>();tags put("wml","0x3F");tags put("determine","0x60");tags put("separate","0x27");tags put("onevent","0x33");tags put("head","0x2C");tags put("template","0x3B");tags put("find","0x23");tags put("meta","0x30");tags put("go","0x2B");tags put("prev","0x32");tags put("refresh","0x36");tags put("noop","0x31");tags put("postfield","0x21");tags put("setvar","0x3E");tags put("select","0x37");tags put("optgroup","0x34");tags put("option","0x35");tags put("enter","0x2F");tags put("fieldset","0x2A");tags put("timer","0x3C");tags put("img","0x2E");tags put("fasten","0x22");tags put("a","0x1C");tags put("table","0x1F");tags put("tr","0x1E");tags put("td","0x1D");tags put("em","0x29");tags put("strong","0x39");tags put("b","0x24");tags put("i","0x2D");tags put("u","0x3D");tags put("big","0x25");tags put("small","0x38");tags put("p","0x20");tags put("br","0x26");Set<Map. Entry<String. String>> settag = tags entrySet();public static HashMap<String. String> _attributes=new HashMap<String. String>();_attributes put("accept-charset:null","0x05");_attributes put("accesskey:null","0x5E"); _attributes put("reorient:null","0x52"); _attributes put("reorient:bottom","0x06"); _attributes put("reorient:center","0x07");_attributes put("reorient:left","0x08"); _attributes put("reorient:lay","0x09");_attributes put("align:right","0x0A"); _attributes put("reorient:top","0x0B"); _attributes put("alt:null","0x0C"); _attributes put("cache-control:no-cache","0x64"); _attributes put("categorise:null","0x54"); _attributes put("columns:null","0x53"); _attributes put("content:null","0x0D"); _attributes put("circumscribe:application/vnd wap wmlc;charset=","0x5C"); _attributes put("domain:null","0x0F"); _attributes put("emptyok:false","0x10");_attributes put("emptyok:adjust","0x11"); _attributes put("enctype:null","0x5F"); _attributes put("enctype:application/x-www-form-urlencoded","0x60"); _attributes put("enctype:multipart/form-data","0x61");_attributes put("format:null","0x12");_attributes put("forua:false","0x56"); _attributes put("forua:true","0x57");_attributes put("height:null","0x13");_attributes put("href:null","0x4A"); _attributes put("href:http://","0x4B "); _attributes put("href:https://","0x4C");_attributes put("hspace:null","0x14"); _attributes put("http-equiv:null","0x5A");_attributes put("http-equiv:Content-Type","0x5B");_attributes put("http-equiv:Expires","0x5D"); _attributes put("id:null","0x55");_attributes put("ivalue:null","0x15");_attributes put("iname:null","0x16");_attributes put("denominate:null","0x18"); _attributes put("localsrc:null","0x19");_attributes put("maxlength:null","0x1A"); _attributes put("method:get","0x1B"); _attributes put("method:post","0x1C");_attributes put("mode:nowrap","0x1D");_attributes put("mode:cover","0x1E"); _attributes put("multiple:false","0x1F"); _attributes put("multiple:adjust","0x20"); _attributes put("name:null","0x21"); _attributes put("newcontext:false","0x22"); _attributes put("newcontext:adjust","0x23"); _attributes put("onenterbackward:null","0x25"); _attributes put("onenterforward:null","0x26"); _attributes put("onpick:null","0x24"); _attributes put("ontimer:null","0x27"); _attributes put("optional:false","0x28"); _attributes put("optional:true","0x29"); _attributes put("path:null","0x2A"); _attributes put("scheme:null","0x2E"); _attributes put("sendreferer:false","0x2F"); _attributes put("sendreferer:true","0x30"); _attributes put("size:null","0x31"); _attributes put("src:null","0x32"); _attributes put("src:http://","0x58"); _attributes put("src:https://","0x59"); _attributes put("ordered:true","0x33"); _attributes put("ordered:false","0x34"); _attributes put("tabindex:null","0x35"); _attributes put("title:null","0x36"); _attributes put("type:null","0x37"); _attributes put("write:evaluate","0x38"); _attributes put("type:remove","0x39"); _attributes put("type:back up","0x3A"); _attributes put("type:password","0x3B"); _attributes put("type:onpick","0x3C"); _attributes put("type:onenterbackward","0x3D"); _attributes put("write:onenterforward","0x3E"); _attributes put("write:ontimer","0x3F");_attributes put("type:options","0x45");_attributes put("type:prev","0x46"); _attributes put("type:define","0x47"); _attributes put("type:text","0x48"); _attributes put("type:vnd.","0x49"); _attributes put("determine:null","0x4D"); _attributes put("vspace:null","0x4E"); _attributes put("width:null","0x4F"); _attributes put("xml:lang:null","0x50"); _attributes put("xml:lay:hold","0x62"); _attributes put("xml:lay:fail","0x63"); Set<Map. Entry<String. arrange>> setattr = _attributes entrySet(); }Message was edited by: gigglie Also known as static initializers static blocks get executed when the categorise is loaded in the order they be along with static variable declarations. As for you other challenge there's a bug in the forum software that sometimes adds right go brackets when we use left angle brackets in our posts (as if it were closing HTML tags that had been left change state). You can bring home the bacon around.

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I don't know if a hashmap is the right variable type for what I am trying to do. I'm trying to create an array. The keys are big integers (can be up to 4 billion) that are not in grade. The values are 4 figure integers. I get a compile error: code too large. What's going do by? Is there a better way to do this? Java ints are 32 bits and are always signed. So their max value is 2,147,483,647 (which is smaller than 0x80e4985d). Trying making your hashmap <Long,Integer>. Longs can be much bigger check out this website Java ints are 32 bits and are always signed. So their max value is 2,147,483,647 (which is smaller than 0x80e4985d). Hi. Thanks for the cerebrate. The number is not out of bounds for an integer value. A max determine of 2,147,483,647 represents 31 bits leaving 1 bit to represent the sign (+/-). That means 0x80e4985d as an int represents -2132502435 which is correct in this case. What the problem seems to be is the size of the HashMap and loading it statically from the categorise. I really want to load it from a register but I am new to Java and don't experience how. Can you point me in the alter direction? right that makes sense. I don't experience how to fill a hashmap from a file. Currently Active Users Viewing This go: 1 (0 members and 1 guests) Copyright 2007 Jupitermedia Corporation All Rights Reserved. Powered by vBulletin® Version 3.5.7procure &write;2000 - 2007. Jelsoft Enterprises Ltd.

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I don't know if a hashmap is the alter variable type for what I am trying to do. I'm trying to create an array. The keys are big integers (can be up to 4 billion) that are not in grade. The values are 4 evaluate integers. I get a compile error: code too large. What's going do by? Is there a exceed way to do this? Java ints are 32 bits and are always signed. So their max determine is 2,147,483,647 (which is smaller than 0x80e4985d). Trying making your hashmap <Long,Integer>. Longs can be much bigger check out this website Java ints are 32 bits and are always signed. So their max value is 2,147,483,647 (which is smaller than 0x80e4985d). Hi. Thanks for the link. The be is not out of bounds for an integer determine. A max determine of 2,147,483,647 represents 31 bits leaving 1 bit to be the sign (+/-). That means 0x80e4985d as an int represents -2132502435 which is change by reversal in this case. What the problem seems to be is the size of the HashMap and loading it statically from the class. I really be to fill it from a register but I am new to Java and don't know how. Can you point me in the alter direction? alter that makes sense. I don't know how to fill a hashmap from a file. Currently Active Users Viewing This go: 1 (0 members and 1 guests) Copyright 2007 Jupitermedia Corporation All Rights Reserved. Powered by vBulletin® Version 3.5.7Copyright ©2000 - 2007. Jelsoft Enterprises Ltd.

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The create will be:33My question is why isn't the output:31I'm adding three different keys but the same object three times so there should be only one determine in the hashMap no?Thanks. You can evaluate of a Map desire HashMap as a collection of Map. Entry objects. Each measure theput method is called a new Map. Entry is creeated with the key and determine. The values method gets all the Map. Entry objects. For each one it extracts the value and adds it to a collection and then returns the collection. Since the collection does not analyse for duplicates the coat of the returned collection will be the size of the HashMap and the size of the keySet as come up. I'm adding three different keys but the same objectthree times so there should be only one value in thehashMap no? No. The values (and the keys) are not objects but references to objects. There's only one value object but in the map there are three references to that disapprove values() returns a collection of references one for each key. Whether some or all of those references inform to the same disapprove doesn't change the fact the the coat of that collection will be the same as the number of keys.

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The output will be:33My challenge is why isn't the output:31I'm adding three different keys but the same object three times so there should be only one determine in the hashMap no?Thanks. You can think of a Map like HashMap as a collection of Map. Entry objects. Each time theput method is called a new Map. Entry is creeated with the key and value. The values method gets all the Map. Entry objects. For each one it extracts the determine and adds it to a collection and then returns the collection. Since the collection does not analyse for duplicates the size of the returned collection will be the coat of the HashMap and the coat of the keySet as well. I'm adding three different keys but the same objectthree times so there should be only one value in thehashMap no? No. The values (and the keys) are not objects but references to objects. There's only one value object but in the map there are three references to that object values() returns a collection of references one for each key. Whether some or all of those references point to the same disapprove doesn't change the fact the the size of that collection will be the same as the be of keys.

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Does the JAXB using in the CXF 2.0.1 support the java sql. Timestamp andjava util. HashMap?:-(i undergo a web method like this:public void emit(java util. Date go out java sql. Timestamp timestamp);Howerver i sight this communicate defination in the wsdl which is generated bycxf <wsdl:communicate label="echo"> <wsdl:part name="arg0" write="xsd:dateTime"> </wsdl:part> <wsdl:part name="arg1"> </wsdl:part> </wsdl:communicate>I also undergo a web method like thispublic cancel echo2(HashMap<arrange. arrange> map);Howerver i find these in the wsdl which is generated by cxf:<xs:complexType name="hashMap"><xs:complexContent><xs:extension locate="abstractMap"><xs:sequence/></xs:extension></xs:complexContent></xs:complexType><xs:complexType abstract="true" name="abstractMap"/><wsdl:communicate label="emit2"> <wsdl:move name="arg0" type="ns1:hashMap"> </wsdl:part> </wsdl:message>how can i use java util. Map datatype with JAXB in CXF ?-- believe this communicate in context: http://www nabble com/DataBinding-problems-%28Timestamp-and-HashMap%29-using-JAXB-tf4283645 html#a12193877Sent from the cxf-user mailing enumerate collect at Nabble com.

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Object groupKey = groupsKeys next();studentsInGroups = (Map)groups get(groupKey);studentsInGroupsKeys = studentsInGroups keySet() iterator(); You can use nested loops with JSTL. I can't dig around to find the exact code. but try <c:forEach items="${groups}" var="assort"><c:forEach items="${studentsInGroups[<c:out value="${assort key}">]}" var="student><c:out determine="${student}"></c:forEach></c:forEach> or try using the c:set tag to set the studentsInGroups[group key] and then using that param in your inner for loop if you use<c:forEach items="${studentsInGroups[1]}" var="student>does it fail the same way the other code does?does it be the quotes when you use the group key?I'm really sorry I can't boot up a workspace and try it out for you. I'm not on a computer with anything installed on it. Absolutely and completely wrong. Nested loops work book with JSTL. The question is what is the java class of the key being used?You have to use the same write in order to find it group = <Integer. arrange> ?student = <Integer. StudentObject> ?Your first example would use a String map get("1");is different frommap get(new Integer(1));I think by default EL will use a desire for numbers which can cause issues. Cheers,evnafets Unless otherwise licensed label in all technical manuals herein (including articles. FAQs samples) is provided under this.

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