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  • Question about gets and sets and when to use super classes

    - by Nazgulled
    Hi, I have the following get method: public List<PersonalMessage> getMessagesList() { List<PersonalMessage> newList = new ArrayList<PersonalMessage>(); for(PersonalMessage pMessage : this.listMessages) { newList.add(pMessage.clone()); } return newList; } And you can see that if I need to change the implementation from ArrayList to something else, I can easily do it and I just have to change the initialization of newList and all other code that depends on what getMessageList() returns will still work. Then I have this set method: public void setMessagesList(ArrayList<PersonalMessage> listMessages) { this.listMessages = listMessages; } My question is, should I use List instead of `ArrayList in the method signature? I have decided to use ArrayList because this way I can force the implementation I want, otherwise there could be a mess with different types of lists here and there. But I'm not sure if this is the way to go...

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  • getRequestProperty("Authorization") always returns null

    - by Thilo
    I am trying to read the authorization header for an HTTP request (because I need to add something to it), but I always get null for the header value. Other headers work fine. public void testAuth() throws MalformedURLException, IOException{ URLConnection request = new URL("http://google.com").openConnection(); request.setRequestProperty("Authorization", "MyHeader"); request.setRequestProperty("Stackoverflow", "anotherHeader"); // works fine assertEquals("anotherHeader", request.getRequestProperty("Stackoverflow")); // Auth header returns null assertEquals("MyHeader", request.getRequestProperty("Authorization")); } Am I doing something wrong? Is this a "security" feature? Is there a way to make this work with URLConnection, or do I need to use another HTTP client library?

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  • Combobox having values but not showing text

    - by ras
    hi, I'm using GWT-EXT combobox. My problem is when I render the combobox, it's having as many rows as it has values but all the rows are empty means text is not shown. Here's my code. Combobox cb = new Combobox(); cb.setForceSelection(true); cb.setMinChars(1); cb.setWidth(200); cb.setStore(store); // Store is perfectly loaded in combobox cb.setDisplayField("ReportName"); cb.setMode(ComboBox.LOCAL); cb.setTriggerAction(ALL); cb.setEmptyText("--Select--"); cb.setLoadingText("Searching..."); cb.setTypeAhead(true); cb.setSelectOnFocus(true); All other code is working fine. I'm sure for one thing that this problem is related to one of the functions of Combobox. Thanks in advance.

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  • Eclipse 3.5: Implementing my own context menu for a MultipageEditorPart --> no viewer involved

    - by Patrick
    Hello! :-) In my current RCP-project i use a MultipageEditorPart. It has various pages, with simple SWT composites on it. The composites contain some Text and Combo elements. When the user right clicks onto the editor page, I want a context menu to open. This menu holds a command for creating a new editor page, with a composite on it. The command is already working, but I'm quite clueless about how to implement the context menu for the editor. Can someone help with this?

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  • Should my internal API classes be all in one package?

    - by Chris
    I'm hard at work packaging up an API for public consumption. As such I'm trying to limit the methods that are exposed to only those that I wish to be public and supportable. Underneath this of course there are a multitude of limited access methods. The trouble is that I have a lot of internal code that needs to access these restricted methods without making those methods public. This creates two issues: I can't create interfaces to communicate between classes as this would make these my internal methods public. I can't access protected or default methods unless I put the majority of my internal classes in the same package. So, I have around 70 or 80 internal classes in cleanly segregated packages BUT with overly permissive access modifiers. Would you say that a single package is the lesser of two evils or is there a better way to be able to mask my internal methods whilst keeping more granular packages? I'd be interested to find out the best practice here. I'm already aware of This

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  • Best way to style GWT widgets in a library

    - by helios
    I'm developing some widgets into a library for internal use at the company I work for. I don't know what's the recommended way to style the widgets. There are at least these ways: use Widget.setPrimaryStyleName and let the user provide an external css. We use maven archetypes to build applications so we can provide default styles. Anyway I don't like it very much. use the GWT 2.0 CssResourceBundle. So we can compile the CSS into the module and it will be optimized (and it can be browser-dependant too). provide a module with the styling. Something like the default GWT themes. But I don't know how exactly this works. I want to: make the components as cohesive as I can (don't depend on externally included css's) leave open the door to modify styles (if I want to change the way some widget looks in a concrete application). What's your experience in this subject?

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  • Managed bean property value not set to null

    - by Vladimir
    Hi! I'm new to JSF, so this question might be strange. I have an inputText component's value bound to managed bean's property of type Float. I need to set property to null when inputText field is empty, not to 0 value. It's not done by default, so I added converter with the following method implemented: public Object getAsObject(FacesContext arg0, UIComponent arg1, String arg2) throws ConverterException { if (StringUtils.isEmpty(arg2)) { return null; } float result = Float.parseFloat(arg2); if (result == 0) { return null; } return result; } I registered converter, and assigned it to inputText component. I logged arg2 argument, and also logged return value from getAsObject method. By my log I can see that it returns null value. But, I also log setter property on backing bean and argument is 0 value, not null as expected. To be more precise, it is setter property is called twice, once with null argument, second time with 0 value argument. It still sets backing bean value to 0. How can I set value to null? Thanks in advance.

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  • Accept All Cookies via HttpClient

    - by Vinay
    So this is currently how my app is set up: 1.) Login Activity. 2.) Once logged in, other activities may be fired up that use PHP scripts that require the cookies sent from logging in. I am using one HttpClient across my app to ensure that the same cookies are used, but my problem is that I am getting 2 of the 3 cookies rejected. I do not care about the validity of the cookies, but I do need them to be accepted. I tried setting the CookiePolicy, but that hasn't worked either. This is what logcat is saying: 11-26 10:33:57.613: WARN/ResponseProcessCookies(271): Cookie rejected: "[version: 0] [name: cookie_user_id][value: 1][domain: www.trackallthethings.com][path: trackallthethings][expiry: Sun Nov 25 11:33:00 CST 2012]". Illegal path attribute "trackallthethings". Path of origin: "/mobile-api/login.php" 11-26 10:33:57.593: WARN/ResponseProcessCookies(271): Cookie rejected: "[version: 0][name: cookie_session_id][value: 1985208971][domain: www.trackallthethings.com][path: trackallthethings][expiry: Sun Nov 25 11:33:00 CST 2012]". Illegal path attribute "trackallthethings". Path of origin: "/mobile-api/login.php" I am sure that my actual code is correct (my app still logs in correctly, just doesn't accept the aforementioned cookies), but here it is anyway: HttpGet httpget = new HttpGet(//MY URL); HttpResponse response; response = Main.httpclient.execute(httpget); HttpEntity entity = response.getEntity(); InputStream in = entity.getContent(); BufferedReader reader = new BufferedReader(new InputStreamReader(in)); StringBuilder sb = new StringBuilder(); From here I use the StringBuilder to simply get the String of the response. Nothing fancy. I understand that the reason my cookies are being rejected is because of an "Illegal path attribute" (I am running a script at /mobile-api/login.php whereas the cookie will return with a path of just "/" for trackallthethings), but I would like to accept the cookies anyhow. Is there a way to do this?

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  • Encountering NullPointerException when trying to add polynoms

    - by Ayler Cruz
    I need to add two polynomials, which is composed of two ints. For example, the coefficient and the exponent 3x^2 would be constructed using 3 and 2 as parameters. I am getting a NullPointerException but I can't figure out why. Any help would be appreciated! public class Polynomial { private Node poly; public Polynomial() { } private Polynomial(Node p) { poly = p; } private class Term { int coefficient; int exponent; private Term(int coefficient, int exponent) { this.coefficient = coefficient; this.exponent = exponent; } } private class Node { private Term data; private Node next; private Node(Term data, Node next) { this.data = data; this.next = next; } } public void addTerm(int coeff, int exp) { Node pointer = poly; if (pointer.next == null) { poly.next = new Node(new Term(coeff, exp), null); } else { while (pointer.next != null) { if (pointer.next.data.exponent < exp) { Node temp = new Node(new Term(coeff, exp), pointer.next.next); pointer.next = temp; return; } pointer = pointer.next; } pointer.next = new Node(new Term(coeff, exp), null); } } public Polynomial polyAdd(Polynomial p) { return new Polynomial(polyAdd(this.poly, p.poly)); } private Node polyAdd(Node p1, Node p2) { if (p1 == p2) { Term adding = new Term(p1.data.coefficient + p2.data.coefficient, p1.data.exponent); p1 = p1.next; p2 = p2.next; return new Node(adding, null); } if (p1.data.exponent > p2.data.exponent) { p2 = p2.next; } if (p1.data.exponent < p2.data.exponent) { p1 = p1.next; } if (p1.next != null && p2.next != null) { return polyAdd(p1, p2); } return new Node(null, null); } }

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  • Delete element from array

    - by Julio Diaz
    Is there a way I can get rid of some elements in an array. for instance, if i have this array int testArray[] = {0,2,0,3,0,4,5,6} Is there a "fast" way to get rid of the elements that equal 0 int resultArray[] = {2,3,4,5,6} I tried this function but I got lost using Lists public int[] getRidOfZero(int []s){ List<> result=new ArrayList<>(); for(int i=0; i<s.length; i++){ if(s[i]<0){ int temp = s[i]; result.add(temp); } } return result.toArray(new int[]); }

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  • What could be the reason for continuous Full GC's during application startup.

    - by Kumar225
    What could be the reason for continuous Full GC's during application (webapplication deployed on tomcat) startup? JDK 1.6 Memory settings -Xms1024M -Xmx1024M -XX:PermSize=200M -XX:MaxPermSize=512M -XX:+UseParallelOldGC jmap output is below Heap Configuration: MinHeapFreeRatio = 40 MaxHeapFreeRatio = 70 MaxHeapSize = 1073741824 (1024.0MB) NewSize = 2686976 (2.5625MB) MaxNewSize = 17592186044415 MB OldSize = 5439488 (5.1875MB) NewRatio = 2 SurvivorRatio = 8 PermSize = 209715200 (200.0MB) MaxPermSize = 536870912 (512.0MB) 0.194: [GC [PSYoungGen: 10489K->720K(305856K)] 10489K->720K(1004928K), 0.0061190 secs] [Times: user=0.01 sys=0.00, real=0.00 secs] 0.200: [Full GC (System) [PSYoungGen: 720K->0K(305856K)] [ParOldGen: 0K->594K(699072K)] 720K->594K(1004928K) [PSPermGen: 6645K->6641K(204800K)], 0.0516540 secs] [Times: user=0.10 sys=0.00, real=0.06 secs] 6.184: [GC [PSYoungGen: 262208K->14797K(305856K)] 262802K->15392K(1004928K), 0.0354510 secs] [Times: user=0.18 sys=0.04, real=0.03 secs] 9.549: [GC [PSYoungGen: 277005K->43625K(305856K)] 277600K->60736K(1004928K), 0.0781960 secs] [Times: user=0.56 sys=0.07, real=0.08 secs] 11.768: [GC [PSYoungGen: 305833K->43645K(305856K)] 322944K->67436K(1004928K), 0.0584750 secs] [Times: user=0.40 sys=0.05, real=0.06 secs] 15.037: [GC [PSYoungGen: 305853K->43619K(305856K)] 329644K->72932K(1004928K), 0.0688340 secs] [Times: user=0.42 sys=0.01, real=0.07 secs] 19.372: [GC [PSYoungGen: 273171K->43621K(305856K)] 302483K->76957K(1004928K), 0.0573890 secs] [Times: user=0.41 sys=0.01, real=0.06 secs] 19.430: [Full GC (System) [PSYoungGen: 43621K->0K(305856K)] [ParOldGen: 33336K->54668K(699072K)] 76957K->54668K(1004928K) [PSPermGen: 36356K->36296K(204800K)], 0.4569500 secs] [Times: user=1.77 sys=0.02, real=0.46 secs] 19.924: [GC [PSYoungGen: 4280K->128K(305856K)] 58949K->54796K(1004928K), 0.0041070 secs] [Times: user=0.01 sys=0.00, real=0.01 secs] 19.928: [Full GC (System) [PSYoungGen: 128K->0K(305856K)] [ParOldGen: 54668K->54532K(699072K)] 54796K->54532K(1004928K) [PSPermGen: 36300K->36300K(204800K)], 0.3531480 secs] [Times: user=1.19 sys=0.10, real=0.35 secs] 20.284: [GC [PSYoungGen: 4280K->64K(305856K)] 58813K->54596K(1004928K), 0.0040580 secs] [Times: user=0.01 sys=0.00, real=0.01 secs] 20.288: [Full GC (System) [PSYoungGen: 64K->0K(305856K)] [ParOldGen: 54532K->54532K(699072K)] 54596K->54532K(1004928K) [PSPermGen: 36300K->36300K(204800K)], 0.2360580 secs] [Times: user=1.01 sys=0.01, real=0.24 secs] 20.525: [GC [PSYoungGen: 4280K->96K(305856K)] 58813K->54628K(1004928K), 0.0030960 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 20.528: [Full GC (System) [PSYoungGen: 96K->0K(305856K)] [ParOldGen: 54532K->54533K(699072K)] 54628K->54533K(1004928K) [PSPermGen: 36300K->36300K(204800K)], 0.2311320 secs] [Times: user=0.88 sys=0.00, real=0.23 secs] 20.760: [GC [PSYoungGen: 4280K->96K(305856K)] 58814K->54629K(1004928K), 0.0034940 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 20.764: [Full GC (System) [PSYoungGen: 96K->0K(305856K)] [ParOldGen: 54533K->54533K(699072K)] 54629K->54533K(1004928K) [PSPermGen: 36300K->36300K(204800K)], 0.2381600 secs] [Times: user=0.85 sys=0.01, real=0.24 secs] 21.201: [GC [PSYoungGen: 5160K->354K(305856K)] 59694K->54888K(1004928K), 0.0019950 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 21.204: [Full GC (System) [PSYoungGen: 354K->0K(305856K)] [ParOldGen: 54533K->54792K(699072K)] 54888K->54792K(1004928K) [PSPermGen: 36300K->36300K(204800K)], 0.2358570 secs] [Times: user=0.98 sys=0.01, real=0.24 secs] 21.442: [GC [PSYoungGen: 4280K->64K(305856K)] 59073K->54856K(1004928K), 0.0022190 secs] [Times: user=0.01 sys=0.00, real=0.01 secs] 21.444: [Full GC (System) [PSYoungGen: 64K->0K(305856K)] [ParOldGen: 54792K->54792K(699072K)] 54856K->54792K(1004928K) [PSPermGen: 36300K->36300K(204800K)], 0.2475970 secs] [Times: user=0.95 sys=0.00, real=0.24 secs] 21.773: [GC [PSYoungGen: 11200K->741K(305856K)] 65993K->55534K(1004928K), 0.0030230 secs] [Times: user=0.01 sys=0.00, real=0.01 secs] 21.776: [Full GC (System) [PSYoungGen: 741K->0K(305856K)] [ParOldGen: 54792K->54376K(699072K)] 55534K->54376K(1004928K) [PSPermGen: 36538K->36537K(204800K)], 0.2550630 secs] [Times: user=1.05 sys=0.00, real=0.25 secs] 22.033: [GC [PSYoungGen: 4280K->96K(305856K)] 58657K->54472K(1004928K), 0.0032130 secs] [Times: user=0.00 sys=0.00, real=0.01 secs] 22.036: [Full GC (System) [PSYoungGen: 96K->0K(305856K)] [ParOldGen: 54376K->54376K(699072K)] 54472K->54376K(1004928K) [PSPermGen: 36537K->36537K(204800K)], 0.2507170 secs] [Times: user=1.01 sys=0.01, real=0.25 secs] 22.289: [GC [PSYoungGen: 4280K->96K(305856K)] 58657K->54472K(1004928K), 0.0038060 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 22.293: [Full GC (System) [PSYoungGen: 96K->0K(305856K)] [ParOldGen: 54376K->54376K(699072K)] 54472K->54376K(1004928K) [PSPermGen: 36537K->36537K(204800K)], 0.2640250 secs] [Times: user=1.07 sys=0.02, real=0.27 secs] 22.560: [GC [PSYoungGen: 4280K->128K(305856K)] 58657K->54504K(1004928K), 0.0036890 secs] [Times: user=0.01 sys=0.00, real=0.01 secs] 22.564: [Full GC (System) [PSYoungGen: 128K->0K(305856K)] [ParOldGen: 54376K->54377K(699072K)] 54504K->54377K(1004928K) [PSPermGen: 36537K->36536K(204800K)], 0.2585560 secs] [Times: user=1.08 sys=0.01, real=0.25 secs] 22.823: [GC [PSYoungGen: 4533K->96K(305856K)] 58910K->54473K(1004928K), 0.0020840 secs] [Times: user=0.00 sys=0.00, real=0.01 secs] 22.825: [Full GC (System) [PSYoungGen: 96K->0K(305856K)] [ParOldGen: 54377K->54377K(699072K)] 54473K->54377K(1004928K) [PSPermGen: 36536K->36536K(204800K)], 0.2505380 secs] [Times: user=0.99 sys=0.01, real=0.25 secs] 23.077: [GC [PSYoungGen: 4530K->32K(305856K)] 58908K->54409K(1004928K), 0.0016220 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 23.079: [Full GC (System) [PSYoungGen: 32K->0K(305856K)] [ParOldGen: 54377K->54378K(699072K)] 54409K->54378K(1004928K) [PSPermGen: 36536K->36536K(204800K)], 0.2320970 secs] [Times: user=0.95 sys=0.00, real=0.23 secs] 24.424: [GC [PSYoungGen: 87133K->800K(305856K)] 141512K->55179K(1004928K), 0.0038230 secs] [Times: user=0.01 sys=0.01, real=0.01 secs] 24.428: [Full GC (System) [PSYoungGen: 800K->0K(305856K)] [ParOldGen: 54378K->54950K(699072K)] 55179K->54950K(1004928K) [PSPermGen: 37714K->37712K(204800K)], 0.4105190 secs] [Times: user=1.25 sys=0.17, real=0.41 secs] 24.866: [GC [PSYoungGen: 4280K->256K(305856K)] 59231K->55206K(1004928K), 0.0041370 secs] [Times: user=0.01 sys=0.00, real=0.00 secs] 24.870: [Full GC (System) [PSYoungGen: 256K->0K(305856K)] [ParOldGen: 54950K->54789K(699072K)] 55206K->54789K(1004928K) [PSPermGen: 37720K->37719K(204800K)], 0.4160520 secs] [Times: user=1.12 sys=0.19, real=0.42 secs] 29.041: [GC [PSYoungGen: 262208K->12901K(275136K)] 316997K->67691K(974208K), 0.0170890 secs] [Times: user=0.11 sys=0.00, real=0.02 secs]

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  • Hibernate criteria with projection not performing query for @OneToMany mapping

    - by Josh
    I have a domain object, Expense, that has a field called initialFields. It's annotated as so: @OneToMany(fetch = FetchType.EAGER, cascade = { CascadeType.ALL }, orphanRemoval = true) @JoinTable(blah blah) private final List<Field> initialFields; Now I'm trying to use Projections in order to only pull certain fields for performance reasons, but when doing so the initialFields field is always null. It's the only OneToMany field and the only field I am trying to retrieve with the projection that is behaving this way. If I use a regular HQL query initialFields is populated appropriately, but of course I can't limit the fields. Anyone ever seen anything like this?

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  • static setter method injection in Spring

    - by vishnu
    Hi, I have following requirement I wanted to pass http:\\localhost:9080\testws.cls value as setter injection through spring configuration file. How can i do this static variable setter injection for WSDL_LOCATION public class Code1 extends javax.xml.ws.Service { private final static URL CODE1_WSDL_LOCATION; static { URL url = null; try { url = new URL("http:\\localhost:9080\testws.cls"); } catch (MalformedURLException e) { e.printStackTrace(); } CODE1_WSDL_LOCATION = url; } public Code1(URL wsdlLocation, QName serviceName) { super(wsdlLocation, serviceName); } public Code1() { super(CODE1_WSDL_LOCATION, new QName("http://tempuri.org", "Code1")); } /** * * @return * returns Code1Soap */ @WebEndpoint(name = "Code1Soap") public Code1Soap getCode1Soap() { return (Code1Soap)super.getPort(new QName("http://tempuri.org", "Code1Soap"), Code1Soap.class); } } Please help me out.

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  • Why do the outputs differ when I run this code using Netbeans 6.8 and Eclipse?

    - by Vimal Basdeo
    When I am running the following codes using Eclipse and Netbeans 6.8. I want to see the available COM ports on my computer. When running in Eclipse it is returning me all available COm ports but when running t in Netbeans, it does not seem to find any ports .. public static void test(){ Enumeration lists=CommPortIdentifier.getPortIdentifiers(); System.out.println(lists.hasMoreElements()); while (lists.hasMoreElements()){ CommPortIdentifier cn=(CommPortIdentifier)lists.nextElement(); if ((CommPortIdentifier.PORT_SERIAL==cn.getPortType())){ System.out.println("Name is serail portzzzz "+cn.getName()+" Owned status "+cn.isCurrentlyOwned()); try{ SerialPort port1=(SerialPort)cn.open("ComControl",800000); port1.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE); System.out.println("Before get stream"); OutputStream out=port1.getOutputStream(); InputStream input=port1.getInputStream(); System.out.println("Before write"); out.write("AT".getBytes()); System.out.println("After write"); int sample=0; //while((( sample=input.read())!=-1)){ System.out.println("Before read"); //System.out.println(input.read() + "TEsting "); //} System.out.println("After read"); System.out.println("Receive timeout is "+port1.getReceiveTimeout()); }catch(Exception e){ System.err.println(e.getMessage()); } } else{ System.out.println("Name is parallel portzzzz "+cn.getName()+" Owned status "+cn.isCurrentlyOwned()+cn.getPortType()+" "); } } } Output with Netbeans false Output using Eclipse true Name is serail portzzzz COM1 Owned status false Before get stream Before write After write Before read After read Receive timeout is -1 Name is serail portzzzz COM2 Owned status false Before get stream Before write After write Before read After read Receive timeout is -1 Name is parallel portzzzz LPT1 Owned status false2 Name is parallel portzzzz LPT2 Owned status false2

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  • How to pass data from selected rows using checkboxes from JSP to the server

    - by eddy
    Hi, I'd like to know if there's any way to send data to the server for the selected rows using the checkboxes I've put on those rows? I mean , how can I send only the data (in this case mileage ) of those selected rows (selected with the checkboxes) to the server ? see the image Here's the html code I use: <table> <thead> <tr class="tableheader"> <td width="10%"></td> <td width="30%">Vehicle</td> <td width="40%">Driver</td> <td width="10%">Mileage</td> </tr> </thead> <tbody> <c:forEach items="${list}" var="item"> <tr> <td align="center"> <input type="checkbox" name="selectedItems" value="c:out value="${item.numberPlate}"/>"/> </td> <td align="left"><c:out value="${item.numberPlate}"/></td> <td align="left"><c:out value="${item.driver.fullName}" /></td> <td align="left"><input type="text" name="mileage" value="" /></td> </tr> </c:forEach> </tbody> </table> I really hope you can give some guidance on this. Thanks in beforehand.

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  • AddAllAttributes method spring mvc

    - by Nick Robertson
    I have two lists List<User> list_of_users=new ArrayList<User>(); List<String> list_of_attributes=new ArrayList<String>(); When i try to use the following lines of code: model.addAttribute("takeattributes",list_of_users); model.addAttribute("takeattributes",list_of_attributes); I realise that it keeps only the second list (list_of_attributes) and the first deleted. I was wondering how to keep both of these two lists in the model.Is this possible to be happened?Is the AddAllAttributes method what i need?If yes can anyone explain me how the AddAllAttributes method is working.I look at the spring mvc documentation but i didn't really understand.

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  • Print an array elements

    - by 1ace1
    Hello guys, this is my first post and im still a beginner in the programming world so bare with me. I just created an array with 100 initialized values and i want to print out 10 elements on each line so it would be somthing like this 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ...26 this is the code i used and i managed to do it for the first 10 elements but i couldnt figure out how to do it for the rest public static void main(String[] args) { int[] numbers = { 0,1,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17}; int i, count = 0; for (i = 0; i < numbers.length; i++) { System.out.print(numbers[i] + " "); count++; if (count == 9) for (i = 9; i < numbers.length; i++) System.out.println(numbers[i] + " "); } } thanks!

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  • use of system.exit(0)

    - by Warrior
    public class WrapperTest { static { print(10); } static void print(int x) { System.out.println(x); System.exit(0); } } In the above code System.exit(0) is used to stop the program. What argument does that method take? Why do we gave it as 0. Can anyone explain the concept?Thanks.

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  • calling members of class to another class

    - by Hussain
    hii every one I m using Applets i ve three classes ie three applets and I need some members(variables) of one class into another class when i m trying to access variables from one class to another class by creating of object of called class in to calling class then it doesnt give wright output it access those variables but gives null or zero values

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  • Thread runs only once

    - by folone
    When a Thread is finished, you cannot run it once more, using start() method: it throws an Exception. Could anyone explain, why? What stands behind such an architectural decision?

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  • How significant are JPA lazy loading performance benefits?

    - by Robert
    I understand that this is highly specific to the concrete application, but I'm just wondering what's the general opinion, or at least some personal experiences on the issue. I have an aversion towards the 'open session in view' pattern, so to avoid it, I'm thinking about simply fetching everything small eagerly, and using queries in the service layer to fetch larger stuff. Has anyone used this and regretted it? And is there maybe some elegant solution to lazy loading in the view layer that I'm not aware of?

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