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  • Alternative to Nested Loop For Comparison

    - by KGVT
    I'm currently writing a program that needs to compare each file in an ArrayList of variable size. Right now, the way I'm doing this is through a nested code loop: if(tempList.size()>1){ for(int i=0;i<=tempList.size()-1;i++) //Nested loops. I should feel dirty? for(int j=i+1;j<=tempList.size()-1;j++){ //*Gets sorted. System.out.println(checkBytes(tempList.get(i), tempList.get(j))); } } I've read a few differing opinions on the necessity of nested loops, and I was wondering if anyone had a more efficient alternative. At a glance, each comparison is going to need to be done, either way, so the performance should be fairly steady, but I'm moderately convinced there's a cleaner way to do this. Any pointers?

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  • Android color picker - updating color array

    - by zorglub76
    Hi all, I'm trying to create a color picker for Android that looks like a minimalistic version of Gimp's. So, it has a hue slider and a rectangle with saturation/value variants of a color chosen in hue slider. Question: what is the best way to create the rectangle? Right now, I'm creating an 200x200 array of pixels, but it takes ~5sec to create and display rectangle with that array. And I need colors in rectangle to change whenever I change the value in hue slider... Rectangle is bitmap, btw. Can I use color matrices on that and how? Any examples? Thanks in advance!

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  • Spring scheduler shutdown error

    - by Alex
    During development a SPRING based scheduler in a tomcat container, I always get this logoutput at undeploy webapp or shutdown server: Apr 28, 2010 4:21:33 PM org.apache.catalina.core.StandardService stop INFO: Stopping service Catalina Apr 28, 2010 4:21:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SEVERE: A web application appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-1] but has failed to stop it. This is very likely to create a memory leak. Apr 28, 2010 4:21:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SEVERE: A web application appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-2] but has failed to stop it. This is very likely to create a memory leak. Apr 28, 2010 4:21:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SEVERE: A web application appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-3] but has failed to stop it. This is very likely to create a memory leak. Apr 28, 2010 4:21:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SEVERE: A web application appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-4] but has failed to stop it. This is very likely to create a memory leak. Apr 28, 2010 4:21:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SEVERE: A web application appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-5] but has failed to stop it. This is very likely to create a memory leak. . . . SEVERE: A web application created a ThreadLocal with key of type [org.springframework.core.NamedThreadLocal] (value [Prototype beans currently in creation]) and a value of type [null] (value [null]) but failed to remove it when the web application was stopped. To prevent a memory leak, the ThreadLocal has been forcibly removed. Apr 28, 2010 4:21:34 PM org.apache.coyote.http11.Http11Protocol destroy INFO: Stopping Coyote HTTP/1.1 on http-8606 How can I fix this?

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  • Set text highlight colour of Blackberry RichTextField

    - by DaveJohnston
    Does anyone know how to set the background colour of just a section of text within a RichTextField on the Blackberry? I already use the offsets, attributes and fonts arrays to make changes to the appearance of certain sections of the text, but I would like to add a highlight colour to the background of one section too. I know there is a protected method called getBackgroundColors that returns an array of colors to be used, which I can overwrite. But I have tried this and that method never seems to get called in my code, I don't actually know how and when the underlying implementation of the RichTextField actually use this method. Any ideas?

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  • Nullable Date column merge problem

    - by Vladimir
    I am using JPA with openjpa implementation beneath, on a Geronimo application server. I am also using MySQL database. I have a problem with updating object with nullable Date property. When I'm trying to merge entity with Date property set to null, no sql update script is generated (or when other fields are modified, sql update script is generated, but date field is ommited from it). If date field is set to some other not null value, update script is properly generated. Did anyone have problem like that?

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  • Datanucleus/JDO Level 2 Cache on Google App Engine

    - by Thilo
    Is it possible (and does it make sense) to use the JDO Level 2 Cache for the Google App Engine Datastore? First of all, why is there no documentation about this on Google's pages? Are there some problems with it? Do we need to set up limits to protect our memcache quota? According to DataNucleus on Stackoverflow, you can set the following persistence properties: datanucleus.cache.level2.type=javax.cache datanucleus.cache.level2.cacheName={cache name} Is that all? Can we choose any cache name? Other sources on the Internet report using different settings. Also, it seems we need to download the DataNucleus Cache support plugin. Which version would be appropriate? And do we just place it in WEB-INF/lib or does it need more setup to activate it?

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  • Iteration speed of int vs long

    - by jqno
    I have the following two programs: long startTime = System.currentTimeMillis(); for (int i = 0; i < N; i++); long endTime = System.currentTimeMillis(); System.out.println("Elapsed time: " + (endTime - startTime) + " msecs"); and long startTime = System.currentTimeMillis(); for (long i = 0; i < N; i++); long endTime = System.currentTimeMillis(); System.out.println("Elapsed time: " + (endTime - startTime) + " msecs"); Note: the only difference is the type of the loop variable (int and long). When I run this, the first program consistently prints between 0 and 16 msecs, regardless of the value of N. The second takes a lot longer. For N == Integer.MAX_VALUE, it runs in about 1800 msecs on my machine. The run time appears to be more or less linear in N. So why is this? I suppose the JIT-compiler optimizes the int loop to death. And for good reason, because obviously it doesn't do anything. But why doesn't it do so for the long loop as well? A colleague thought we might be measuring the JIT compiler doing its work in the long loop, but since the run time seems to be linear in N, this probably isn't the case.

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  • seam iText integration libraries

    - by Joshua
    seam iText integration seems to use older version of iText jars, would it be possible to use the latest iText 5.0.2 specific jars as part of the maven dependencies. Has anyone done this before? http://repository.jboss.org/maven2/org/jboss/seam/jboss-seam-pdf/2.2.0.GA/jboss-seam-pdf-2.2.0.GA.pom http://repository.jboss.org/maven2/com/lowagie/itext/2.1.2/itext-2.1.2.pom The following dependency uses 2.1.2 version of iText, not sure how to make it use the latest version 5.0.2 of iText. <dependency> <groupId>org.jboss.seam</groupId> <artifactId>jboss-seam-pdf</artifactId> <version>${jboss-seam.version}</version> <exclusions> <exclusion> <groupId>org.jboss.seam</groupId> <artifactId>jboss-seam</artifactId> </exclusion> <exclusion> <groupId>org.jboss.seam</groupId> <artifactId>jboss-seam-ui</artifactId> </exclusion> </exclusions> </dependency>

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  • Single DispatcherServlet with Multiple Controllers

    - by jwmajors81
    I am trying to create some restful web services using Spring MVC 3.0. I currently have an issue that only 1 of my 2 controllers will work at any given time. As it turns out, whichever class comes first when sorted alphabetically will work properly. The error I get is: handleNoSuchRequestHandlingMethod No matching handler method found for servlet request: path '/polinq.xml', method 'GET', parameters map[[empty]] I had a very simliar message earlier also, except instead of the map being empty it was something like map[v--String(array)] Regardless of the message though, currently the LocationCovgController works and the PolicyInquiryController doesn't. If I change the change of the PolicyInquiryController to APolicyInquiryController, then it will start funcitoning properly and the LocationCovgController will stop working. Any assistance would be greatly appreciated. Thank you very much, Jeremy The information provided below includes the skeleton of both controller classes and also the servlet config file that defines how spring should be setup. Controller 1 package org.example; @Controller @RequestMapping(value = "/polinq.*") public class PolicyInquiryController { @RequestMapping(value = "/polinq.*?comClientId={comClientId}") public ModelAndView getAccountSummary( @PathVariable("comClientId") String commercialClientId) { // setup of variable as was removed. ModelAndView mav = new ModelAndView("XmlView", BindingResult.MODEL_KEY_PREFIX + "accsumm", as); return mav; } } Controller 2 package org.example; @Controller @RequestMapping(value = "/loccovginquiry.*") public class LocationCovgController { @RequestMapping(value = "/loccovginquiry.*method={method}") public ModelAndView locationCovgInquiryByPolicyNo( @PathVariable("method")String method) { ModelAndView mav = new ModelAndView("XmlView", BindingResult.MODEL_KEY_PREFIX + "loccovg", covgs); return mav; } } Servlet Config <context:component-scan base-package="org.example." /> <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver" p:order="0"> <property name="mediaTypes"> <map> <entry key="atom" value="application/atom+xml"/> <entry key="xml" value="application/xml"/> <entry key="json" value="application/json"/> <entry key="html" value="text/html"/> </map> </property> <property name="defaultContentType" value="text/html"/> <property name="ignoreAcceptHeader" value="true"/> <property name="favorPathExtension" value="true"/> <property name="viewResolvers"> <list> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean> </list> </property> <property name="defaultViews"> <list> <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView"/> </list> </property> </bean> <bean class="org.springframework.web.servlet.view.BeanNameViewResolver" /> <bean id="XmlView" class="org.springframework.web.servlet.view.xml.MarshallingView"> <property name="marshaller" ref="marshaller"/> </bean> <oxm:jaxb2-marshaller id="marshaller"> <oxm:class-to-be-bound name="org.example.policy.dto.AccountSummary"/> <oxm:class-to-be-bound name="org.example.policy.dto.InsuredName"/> <oxm:class-to-be-bound name="org.example.policy.dto.Producer"/> <oxm:class-to-be-bound name="org.example.policy.dto.PropertyLocCoverage"/> <oxm:class-to-be-bound name="org.example.policy.dto.PropertyLocCoverages"/> </oxm:jaxb2-marshaller>

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  • SmartGWT alternatives

    - by Roger
    I have been using SmartGWT but have run into trouble mixing SmartGWT with other frameworks such as Wicket. Infact it has been a bit of a disaster and I regret going with it in the first place. I do not want this question to turn into any type of flame war, so therefore would just like people to list alternatives and their experience with those alternatives.

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  • Stringtemplate: is it ok to Apply Templates, in which HashMap uses, To Multi-Valued Attributes

    - by user1071830
    There is two template in my .stg file, and both of them apply on multi-value a HashMap. The HashMap is employed as an injected object. And I need those instance of HashMap can be injected for many times. My trouble is, when I switch to another template, ANTLR seems to consider the second HashMap as a List -- multipul objects and null value. Part of my .stg file shows as follows: tpl_hash(BAR, FOO) ::= << <FOO:foo(); separator="\n"> <BAR:bar(); separator="\n"> >> foo(nn) ::= << foo: <nn.name; null="NULL"> . <nn.national; null="NULL"> >> bar(mm) ::= << bar: <mm.name> @ <mm.national> >> Part of my .g file shows: HashMap hm = new HashMap(); hm.put("name", $name.text); hm.put("national", "German"); tpl_hash.add("FOO",new HashMap(hm)); HashMap hm2 = new HashMap(); hm2.put("name", $name.text); hm2.put("national", "German"); tpl_hash.add("BAR",new HashMap(hm2)); The result I expect is : bar: Kant @ German foo: Russell @ England But, I got: foo: NULL . NULL foo: NULL . NULL bar: @ bar: @ If we replace BAR with FOO, as is, keeping FOO and BAR with identical template, the output is right, like the following. bar: Russell @ German bar: Russell @ German In docs, "synchronized ST add (String name, Object value) in org.stringtemplate.v4.ST" said: "If you send in a List and then inject a single value element, add() copies original list and adds the new value." What about a HashMap? Does ANTLR consider the HashMap, key/value pair access, an object purposely, as a List and as multi-value injected by mistake? Thanks a lot in advance.

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  • GWT: Best practice for unit testing / mocking JSNI methods?

    - by Epaga
    I have a class which uses JSNI to retrieve JSON data stored in the host page: protected native JsArray<JsonModel> getModels() /*-{ return $wnd.jsonData; }-*/; This method is called, and the data is then translated and process in a different method. How should I unit test this class, since I'm not able to instantiate (or seemingly mock?) JsArray? What is the best way to unit test JSNI methods at all?

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  • How to invoke ajax, so that it should refresh the table and update the column

    - by Radhika
    Hi, In my application,i have four columns in my datatable.Initially, except second column all the other columns displays the value. The second column values should be displayed by automatic refresh. like Initially table looks like ID type Name Color 1 Benz White 2 Maruti Grey 3 Renault orange 4 VW pink After automatic refresh(Using AJAX) it should display like ID type Name Color 1 2012 Benz White 2 2013 Maruti Grey 3 2014 Renault orange 4 2015 VW pink I have implement this in jsf using ajax. can any one help me out in this.

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  • Showing/hiding a JPopupMenu from a JButton; FocusListener not working?

    - by M. Joanis
    Hi everyone, I needed a JButton with an attached dropdown style menu. So I took a JPopupMenu and attached it to the JButton in the way you can see in the code below. What it needs to do is this: show the popup when clicked hide it if clicked a second time hide it if an item is selected in the popup hide it if the user clicks somewhere else in the screen These 4 things work, but because of the boolean flag I'm using, if the user clicks somewhere else or selects an item, I have to click twice on the button before it shows up again. That's why I tried to add a FocusListener (which is absolutely not responding) to fix that and set the flag false in these cases. Here are the listeners: (It's in a class extending JButton, so the second listener is on the JButton.) // Show popup on left click. menu.addFocusListener(new FocusListener() { @Override public void focusLost(FocusEvent e) { System.out.println("LOST FOCUS"); isShowingPopup = false; } @Override public void focusGained(FocusEvent e) { System.out.println("GAINED FOCUS"); } }); addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { System.out.println("isShowingPopup: " + isShowingPopup); if (isShowingPopup) { isShowingPopup = false; } else { Component c = (Component) e.getSource(); menu.show(c, -1, c.getHeight()); isShowingPopup = true; } } }); I've been fighting with this for way too long now. If someone can give me a clue about what's wrong with this, it would be great! Thanks!

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  • how select all cell while selected JTable value?

    - by Venkats
    First i gave all values of row in JTAble. While inserting table values into database, I selected all values of row in JTable, using the following model.getValueAt(rowIndex,colIndex); But this method gets all the columns except the last inserted column in a row. If i pressed enter key, after getting all values it done well. How to get all columns in a row with out pressed enter key?

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  • apache cxf: c error

    - by robinmag
    I tried to deploy the sample application from this tutorial: http://united-coders.com/phillip-steffensen/developing-a-simple-soap-webservice-using-spring-30-apache-cxf-226-and-maven-2 In eclipse everything works fine, but i went to troubles when deploying the service. The cxf-java2ws-plugin throws a ClassNotFoundException for org.springframework.core.NestedRuntimeException. Here is my maven pom build plugin (copy from the example) <plugin> <groupId>org.apache.cxf</groupId> <artifactId>cxf-java2ws-plugin</artifactId> <version>${cxf.version}</version> <dependencies> <dependency> <groupId>org.apache.cxf</groupId> <artifactId>cxf-rt-frontend-jaxws</artifactId> <version>${cxf.version}</version> </dependency> <dependency> <groupId>org.apache.cxf</groupId> <artifactId>cxf-rt-frontend-simple</artifactId> <version>${cxf.version}</version> </dependency> </dependencies> <executions> <execution> <id>process-classes</id> <phase>process-classes</phase> <configuration> <className>vn.vdconline.ws.sso.PersonService</className> <genWsdl>true</genWsdl> <verbose>true</verbose> </configuration> <goals> <goal>java2ws</goal> </goals> </execution> </executions> </plugin> Please tell me if i missed any thing. Thank you!

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  • How do you marshall a parameterized type with JAX-WS / JAXB?

    - by LES2
    Consider the following classes (please assume public getter and setter methods for the private fields). // contains a bunch of properties public abstract class Person { private String name; } // adds some properties specific to teachers public class Teacher extends Person { private int salary; } // adds some properties specific to students public class Student extends Person { private String course; } // adds some properties that apply to an entire group of people public class Result<T extends Person> { private List<T> group; private String city; // ... } We might have the following web service implementation annotated as follows: @WebService public class PersonService { @WebMethod public Result<Teacher> getTeachers() { ... } @WebMethod public Result<Student> getStudents() { ... } } The problem is that JAXB appears to marshall the Result object as a Result<Person> instead of the concrete type. So the Result returned by getTeachers() is serialized as containing a List<Person> instead of List<Teacher>, and the same for getStudents(), mutatis mutandis. Is this the expected behavior? Do I need to use @XmlSeeAlso on Person? Thanks! LES

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  • Servlet Filters and the OSGi HttpService

    - by wrumsby
    I'm working on an OSGi-based application that uses org.osgi.service.http.HttpService which does not support the use of Servlet Filters. Before I realised that I wouldn't be able to use Servlet Filters I was planning to apply a couple of existing Filters. These Filters set the appropriate HTTP headers to: prevent caching of responses control rendering in IE8 with the X-UA-Compatible header What are my options here? I don't want to use meta elements to control caching since that technique is unreliable. Using a meta element to set the X-UA-Compatible header is probably acceptable, but I'd still be interested in alternative approaches.

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  • EXT-GWT Portal: How to get all Portlets?

    - by Lars
    Hi all this is my first Question here! Im just making my first steps with (Ext-) GWT. I´m testing the Ext-GWT libraries and really: These are absolute great! Now my question: Is it possible to make a kind of "clear-Portal" or "hide all portles" for a defined Portal? Or have i always manually clear the portal like in my example code above? My sample code looks like this: //define the Portal, 2 columns, each 50% auf width, with borders and Backgroundcolor portal = new Portal(2); portal.setBorders(true); portal.setStyleAttribute("backgroundColor", "white"); portal.setColumnWidth(0, .50); portal.setColumnWidth(1, .50); //define a Portlet for showing all Users portletUser = new Portlet(); portletUser.setHeading("Benutzer"); configPanel(portletUser); portletUser.setLayout(new FitLayout()); CompUserList compUserList = new CompUserList(); portletUser.add(compUserList); portletUser.setHeight(250); //define a Portlet for showing all Vehicles portletVehicles = new Portlet(); portletVehicles.setHeading("Fahrzeuge"); configPanel(portletVehicles); portletVehicles.setLayout(new FitLayout()); CompVehicleList compVehicleList = new CompVehicleList(); portletVehicles.add(compVehicleList); portletVehicles.setHeight(250); //define a portlet for showing all countries portletCountries = new Portlet(); portletCountries.setHeading("Länder"); configPanel(portletCountries); portletCountries.setLayout(new FitLayout()); CompCountryList compCountryList = new CompCountryList(); portletCountries.add(compCountryList); portletCountries.setHeight(250); //add both Portlets to Portal portal.add(portletUser, 0); portal.add(portletVehicles, 1); So first of all this works fine and looks great :-) Now i have a a button in a accordeon menu. The Listener on this button should hide all portlets in the portal (at this time its the portletUser and portletVehicles) and then add another portlet (for example the portletCountries): portletUser.hide(); portletVehicles.hide(); portal.add(portletCountries, 0) Question from above again ;-) Is it possible to make a kind of "clear-Portal" or "hide all portles" for a defined Portal? Or have i always manually clear the portal like in my example code above? What is the best practice for this functionallity? Thanks all for your tips! Lars.

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  • blackberry mainscreen vertical scroll

    - by pajton
    I am trying to create a MainScreen with vertical scrolling. From what I've read in the documentation, MainScreen has a VerticalManager inside, so it should be possible to enable vertical scrolling only with proper construction, i.e: super(MainScreen.VERTICAL_SCROLL | MainScreen.VERTICAL_SCROLLBAR); This is not working for me, however. I am creating a screen, adding a couple of LabelFields and no scrollbar, no scrolling at all. I am testing on 8900, OS 5.0. Here is the code I use: public class ExampleScreen extends MainScreen { public ExampleScreen() { super(MainScreen.VERTICAL_SCROLL | MainScreen.VERTICAL_SCROLLBAR); create(); } private void add(String text) { add(new LabelField(text)); } private void create() { add("line 0"); add("line 1"); ... etc ... } } The question is am I doing something wrong? Is there a way to enable vertical scrolling with MainScreen or do I need to create a VerticalManager myself?

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