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  • Java and C# : how to decide

    - by Andrea
    I'm working in a company where i work on environment. Net; I found another company that offered me a job where, however, programming in Java. I do not know Java and want to understand what are the differences. With the. NET framework I can build Windows Forms applications, web (asp.net and asp.net MVC), Silverlight (also for the 7 Series phones), WPF, WCF services and more and I have also Intellisense and ReSharper. In java? It 'a language that has a future? You what would you do? Thanks

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  • How to extend the list of available Java Locales

    - by alfonx
    I am looking for a way to add more Locales to the Locales available in Java 1.6. But the Locales I want to create do not have ISO-3166 country codes, nor ISO-639 language codes. Is there any way to do this anyways? The Locales I want to add only differ in the language names, but the smaller an ethnic group is, the more picky they get about their identity ;-) So I thought about extending an existing Locale, something like UserDefinedLocale extends Locale { UserDefinedLocale (Locale parentLocale) {...} } but java.util.Locale is final, which makes it especially hard to hack something around... So, is the idea that the list of Java Locales is exhaustive? Am I the first to miss some more Locales?

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  • Java Double Array

    - by user1062058
    I'm having trouble setting up and placing values into an array using a text file containing the floating point numbers 2.1 and 4.3 each number is separated by a space - below is the error I'm getting: Exception in thread "main" java.util.NoSuchElementException import java.util.*; import java.io.*; public class DoubleArray { public static void main(String[] args) throws FileNotFoundException { Scanner in = new Scanner(new FileReader("mytestnumbers.txt")); double [] nums = new double[2]; for (int counter=0; counter < 2; counter++) { int index = 0; index++; nums[index] = in.nextDouble(); } } } Thanks, I'm sure this isn't a hard question to answer... I appreciate your time.

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  • Java Collections.Rotate with an array doesn't work

    - by steve_72
    I have the following java code: import java.util.Arrays; import java.util.Collections; public class Test { public static void main(String[] args) { int[] test = {1,2,3,4,5}; Collections.rotate(Arrays.asList(test), -1); for(int i = 0; i < test.length; i++) { System.out.println(test[i]); } } } I want the array to be rotated, but the output I get is 1 2 3 4 5 Why is this? And is there an alternative solution?

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  • Simple Hash that is always equal between C# and Java

    - by GaiusSensei
    I have a C# WebService and a (Java) Android Application. Is there a SIMPLE hash function that produces the same result between these two languages? The simplest C# hash is a String.GetHashCode(), but I can't replicate it in Java. The simplest Java hash is not simple at all. And I don't know if I can replicate it exactly in C#. In case it's relevant, I'm hashing passwords before sending it across the internet. I'm currently using Encode64, but that's obviously not secure since we can reverse it.

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  • Parsing C# Script into Java

    - by pantaryl
    I'm looking for a way to easily read in a C# file and place it into a Java Object for database storage (storing the class name, functions, variables, etc). I'm making a Hierarchical State Machine AI Building Tool for a game I'm creating and need to be able to import an existing C# file and store it in a database for retrieval in the future. Does anyone know of any preexisting libraries for parsing C# files? Something similar to JavaParser? Thanks everyone! EDIT: This needs to be part of my Java Project. I'll be loading in the C# files through my Java Application and saving it into my db4o database.

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  • Exception for java Swing application?

    - by Rich Fluckiger
    For some reason this is locking up the java application. Did I handle the exception correctly? private void submitButtonActionPerformed(java.awt.event.ActionEvent evt) { double amount, interest,rateCalc, a, b, c, payment; int years, months; while (true){ try{ amount = Double.valueOf(loanAmount.getText()); interest = Double.valueOf(interestRate.getText()); years = Integer.valueOf(loanYears.getText()); rateCalc = (interest/12); months = (years*12); a = Math.pow((1+rateCalc),months); b = (a*rateCalc); c = (a-1); payment = (amount *(b/c)); monthlyPayment.setText("Mortgage Payment $ = " + payment); } catch (NumberFormatException nfe){ javax.swing.JOptionPane.showMessageDialog(null, "Please enter numbers and not letters"); return; } } } monthlyPayment returns to the java app.

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  • Shift from Java to c++

    - by zengr
    Hello, I have been developing applications based on C# (.net) and Java (J2EE) from the last 3 years. But, now I feel, Java, C# makes you lame (from learning point of view) and you can develop your apps quickly but you fail to understand the basic underlying concepts of programming. So, I am trying to learn C++, but I find it a little "confusing" due to pointer, multiple inheritance, some conventions and other concepts of C++ which don't exist in Java. So, what do you guys suggest? How should I got about it? Thanks PS: I am a student, so have all the time in the world and actually shift.

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  • iPhone App/Java Server Struct Data Issue over WiFi

    - by adimitri
    I currently have an iPhone app that communicates with a C++ server running on a computer, over WiFi. This app is sending its data (x,y coordinates) in a c-struct to the server. For further development, we would like the iPhone application to communicate directly with a java server, however the major issue is that java does not have the ability to emulate or use a c-struct. What would be the best way to send data (x,y coordinates) between the two devices? I can already establish a connection between the two devices. More specifically how I would receive the data and process it on the Java end. Thanks for your help, Alex

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  • Call java program on server through web request

    - by Rossella
    I need to develop an application where a Java client calls a Java application located on the server with certain parameters, the Java application on the server computes data and sends the data back to the client. Everything needs to go through port 80 on which I have a IIS webserver listening. I cannot open any other port on the server. Is there any way I can do this? The server can write files in a directory that the client can read but I am not sure how to handle the synchronization and I don't know how to call a script on the server from the client through port 80. Every suggestion would be highly appreciated Thanks a lot in advance, this problem is making me crazy

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  • Java application return codes

    - by doele
    I have a Java program that processes one file at a time. This Java program is called from a wrapper script which logs the return code from the Java program. There are 2 types of errors. Expected errors and unexpected errors. In both cases I just need to log them. My wrapper knows about 3 different states. 0-OK, 1-PROCESSING_FAILED, 2- ERROR. Is this a valid approach? Here is my approach: enum ReturnCodes {OK,PROCESSING_FAILED,ERROR}; public static void main(String[] args) { ... proc.processMyFile(); ... System.exit(ReturnCodes.OK.ordinal()); } catch (Throwable t) { ... System.exit(ReturnCodes.ERROR.ordinal()); } private void processMyFile() { try { ... }catch( ExpectedException e) { ... System.exit(ReturnCodes.PROCESSING_FAILED.ordinal()); } }

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  • Google AppEngine java.net.Socket is restricted error

    - by ofko
    I'm using Quercus/PHP on AppEngine. When I run a simple script with file_get_contents($url); I get an error: java.lang.NoClassDefFoundError: java.net.Socket is a restricted class. Please see the Google App Engine developer's guide for more details. I've googled and although I find that other's have run into the same error, but the cause seems the vary. What do you think is cousing this error for me? I'm using the latest AppEngine Java SDK, and the latest Quercus.

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  • Microsoft Web Farm Framework 502 error

    - by hermiod
    My apologies if this is a really stupid question, but I have installed and set up the new Microsoft Web Farm Framework in a UAT environment with a controller machine, a primary, and a secondary server. I have installed one of our in-house applications on to the primary server and it has been successfully provisioned across to the secondary. I have tried accessing the server via the url http:\mis-uat-002\testfarm\reviewer where mis-uat-002 is the name of the farm controller, testfarm is the name of the farm, and reviewer is the name of the application. When using this url I get a "502 - Web server received an invalid response while acting as a gateway or proxy server." error. If I access the application directly via http:\mis-uat-003\reviewer (mis-uat-003 is the primary farm server, reviewer is the application) then it works no problem. Is there some additional set up that needs to be done in order for the farm controller to do its job? It should be noted that this is a UAT environment so is not on a domain of any sort. However, if this was successful and the WFF came out with V1.0 fairly soon, we would be looking to run this on a Windows 2008 domain.

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  • Tracking down the cause of a web service fault running in IIS

    - by BG100
    I have built a web service in Visual Studio 2008, and deployed it on IIS 7 running on Windows Server 2008 R2. It has been extensively tested, handles all errors gracefully and logs any uncaught errors to a file using log4net. The system normally runs perfectly, but occasionally (2 or 3 times a day) a fault occurs and screws up the application which needs an iisreset to get it working again. When the fault occurs I get some random errors that are caught by my catch-all error log, such as: Value cannot be null. Could not convert from type 'System.Boolean' to type 'System.DateTime'. Sequence contains no elements These errors are raised on every request until I manually do an iisreset, but there is no sight of them when the system is running normally. The web service is a stateless request-response application. Nothing is stored in the session. It could be load related, but I doubt it as there are only around 30 or 40 requests per minute. This is proving very tricky to track down. I can't work out what is putting IIS into this bad state, and why it needs an iisreset to get it working again. Nothing is reported in the event log. Can anyone suggest how to enable more extensive logging that might catch this fault? Also, does anyone know what might be causing the problem?

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  • Copy a website and preserve the file & folder structure

    - by DrStalker
    I have an old web site running on an ancient version of Oracle Portal that we need to convert to a flat-html structure. Due to damage to the server we are not able to access the administrative interface, and even if we could there is no export functionality that can work with modern software versions. It would be enough to crawl the website and have all the pages & images saved to a folder, but the file structure needs to be preserved; that is, if a page is located at http://www.oldserver.com/foo/bar/baz/mypage.html then it needs to be saved to /foo/bar/baz/mypage.html so that the various Javascript bits will continue to function. None of the web crawlers I've found have been able to do this; they all want to rename the pages (page01.html, page02.html etc) and break the folder structure. Is there any crawler out there that will recreate the site structure as it appears to a user accessing the site? It doesn't need to redo any of teh content of the pages; once rehosted the pages will all have the same names they did originally so links will continue to work.

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  • URL Redirect Configuration in Virtualhost for a Single Page Web Application

    - by fenderplayer
    I have a web application under development that I am running locally. The home page of the application is fetched with the following url: http://local.dev/myapp/index.shtml When the app runs, javascript on the webpage maintains the url and the app state internally. Some of the other urls read as: http://local.dev/myapp/results?param1=val1&param2=val2 http://local.dev/myapp/someResource Note that there are no pages named results.html or someResource.html on my web server. They are just made up URLs to simulate RESTfulness in the single page app. All the app code - javascript, css etc - is present in the index.shtml file So, essentially, the question is how can I redirect all requests to the first URL above? Here's how the vhost configuration looks like: <VirtualHost 0.0.0.0:80> ServerAdmin [email protected] DocumentRoot "/Users/Me/mySites" ServerName local.dev RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(myapp|myapp2)\/results\?.+$ $1/index.shtml [R=301,L] <Directory "/Users/Me/mySites/"> Options +Includes Indexes MultiViews FollowSymlinks AllowOverride All Order allow,deny Allow from all </Directory> ErrorLog "/private/var/log/apache2/error.log" CustomLog "/private/var/log/apache2/access.log" common </VirtualHost> But this doesn't seem to work. Requesting the other URLs directly results in 404 error.

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  • SharePoint Web Analytics not tracking usage for main application

    - by Chris W
    My SP 2010 setup is two separate applications - one for the main portal and one for MySite. Whilst WebAnalytics is tracking usage of MySite it's not showing any stats for the main Portal. The only thing it lists is the number of site collections but no page views etc. The WA service is clearly running to pick up data for MySite. In Configure web analytics and health data collection everything is ticked. I can't find any obvious settings that are different between the two applications. Where should I look to get usage tracking correctly? Edit: Having played with the date ranges I see that actually I've got no stats in the last 7 days for any site at all including MySite which has been working at some point previously. Edit: What does each service (WA Data Processing Service vs WA Web Services) do and where should they be active? At present they're both running on an App server but not on the WFEs (although they were running on WFEs previously). From what I can gather than only need to run on an App server but I find it strange that the only logged activity I see in the staging database relates to Central Admin URLs on the App server and nothing from the WFEs.

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  • Windows/IIS Hosting :: How much is too much?

    - by bsisupport
    I have 4 Windows 2003 servers running IIS 6. These servers host a bunch of unique web sites (in that they are all different in build/architecture/etc). The code behind these sites range from straight HTML, classic ASP, and 1.1/2.0/3.x flavors of .NET. Some (most) of the sites use a SQL backend, which is hosted on one or two different servers – not the IIS servers themselves. No virtualization on these servers and no load balancing for these particular sites. The problem I’m running into is coming up with some baseline metrics to determine, or basically come up with a “baseline score” to know when a web server has reached its hosting limit. Today, some basic information about each server is used: how much bandwidth does the server pump out, hard drive space availability, and basic (very basic) RAM & CPU utilization (what it looks like at peak traffic times.) I would be grateful if those of you that are 1000x smarter than I am could indulge me with your methods of managing IIS environments. Whether performance monitoring specifics, “score” determination as I’m trying to determine, or the obvious combination of both. Thanks in advance.

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  • IIS7 can't read web.config on shared Mac filesystem

    - by RobG
    I'm running a VirtualBox virtualized Windows 2008 Server on my Mac, just finished setting it up today. On it, I have SQL Server 2008, IIS and ColdFusion 9. I want to serve websites from my Mac filesystem (for development purposes). So I created a new website in IIS and pointed it at the appropriate path using a UNC path: \vboxsvr\rob\Sites\testsite, which contains the ColdFusion code and a web.config file. When I attempt to modify the file at all, or view the site in a web browser, I get an error: HTTP 500.19 - Internal Server Error The requested page cannot be accessed because the related configuration data for the page is invalid. I did some Googling, and found several similar problems, but nothing exactly like I have. The closest one seemed to indicate permissions. So I recreated the site and set it up to allow the Administrator (in Windows) to access the stuff. That didn't help. I can read/modify the files just fine from within Windows, but IIS itself can't seem to do it. What do I need to do to fix this? Thanks!

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  • JPA 2?EJB 3.1?JSF 2????????! WebLogic Server 12c?????????Java EE 6??????|WebLogic Channel|??????

    - by ???02
    2012?2???????????????WebLogic Server 12c?????????Java EE 6?????????????????????????????????????????????????????????????Oracle Enterprise Pack for Eclipse 12c??WebLogic Server 12c(???)????Java EE 6??????3??????????????????????????????JPA 2.0??????????·?????????EJB 3.1???????·???????????????(???)???????O/R?????????????JPA 2.0 Java EE 6????????????????????Web?????????????3?????(3????)???????·????????????·????????????????????????????????JPA(Java Persistence API) 2.0???EJB(Enterprise JavaBeans) 3.1???JSF(JavaServer Faces) 2.0????3????????????????·???????????JPA??Java??????????????·?????????????O/R?????????????????????·???????????EJB?Session Bean??????????????????·??????????????????????JSF??????????????????????????????????????? ??????JPA????Oracle Database??EMPLOYEES?????Java??????????????????????Entity Bean??????XML?????????????????????????XML????????????????????????????????????????????????????·?????????????????????????????????????????????????????????????Java EE 6??????JPA 2.0??????????·???????????????????????????????????????????????????????????????????????????????????????? ?????????????????????????????????????????????????????????????Oracle Enterprise Pack for Eclipse(OEPE)??????File????????New?-?Other??????? ??????New??????????????????????????Web?-?Dynamic Web Project???????Next????????????????Dynamic Web Project?????????????Project name????OOW???????????Target Runtime????New Runtime????????? ???New Server Runtime Environment???????????????Oracle?-?Oracle WebLogic Server 12c(12.1.1)???????Next???????????????????????????WebLogic home????C:\Oracle\Middleware\wlserver_12.1???????Finish?????????????WebLogic Home????????????????????????Java home?????????????????????Finish??????????????????????Dynamic Web Project????????????????Finish??????????????????JPA 2.0??????????·?????? ???????????????JPA 2.0???????????????·??????????????????Eclipse??Project Explorer?(??????·???)?????????OOW?????????????????????????????·???????????????Properties?????????????????·???·????????????????????????????Project Facets?????????????JPA??????(?????????????Details?????JPA 2.0?????????????????????)???????????????????Further configuration available????????? ???Modify Faceted Project??????????????????????????????????Connection????????????????????????????Add Connection????????? ??????New Connection Profile????????????????Connection Profile Type????Oracle Database Connection??????Next???????????? ???Specify a Driver and Connection Details???????Drivers????Oracle Database 10g Driver Default???????????Properties?????????????????????SIDxeHostlocalhostPort number1521User nameHRPasswordhr ???????????Test Connection??????????????????Ping Succeeded!?????????????????????????????Finish???????????Modify Faceted Project????????OK????????????????Properties for OOW????????OK?????????????????? ?????????Eclipse????????????????OOW?????????????????·???????????????JPA Tools?-?Generate Entities from Tables...??????? ????Generate Custom Entities???????????????????????????????Schema????HR??????Tables????EMPLOYEES???????????Next???????????? ???????????Next???????????Customize Default Entity Generation??????Package????model???????Finish?????????????JPQL?????????? ?????????Oracle Database??EMPLOYEES??????????????????·????model.Employee.java?????????????????????????????????·?????OOW????Java Resources?-?src?-?model???????Employee.java????????????????????????????????·???Employee????(Employee.java)?package model; import java.io.Serializable; import java.math.BigDecimal; import java.util.Date; import java.util.Set; import javax.persistence.Column;<...?...>/**  * The persistent class for the EMPLOYEES database table.  *  */ @Entity  // ?@Table(name="EMPLOYEES")  // ?// Apublic class Employee implements Serializable {        private static final long serialVersionUID = 1L;       @Id  // ?       @Column(name="EMPLOYEE_ID")        private long employeeId;        @Column(name="COMMISSION_PCT")        private BigDecimal commissionPct;        @Column(name="DEPARTMENT_ID")        private BigDecimal departmentId;        private String email;        @Column(name="FIRST_NAME")        private String firstName;       @Temporal( TemporalType.DATE)  //?       @Column(name="HIRE_DATE")        private Date hireDate;        @Column(name="JOB_ID")        private String jobId;        @Column(name="LAST_NAME")        private String lastName;        @Column(name="PHONE_NUMBER")        private String phoneNumber;        private BigDecimal salary;        //bi-directional many-to-one association to Employee<...?...>}  ???????????????·???????????????????????????????????????????@Table(name="")??????@Table??????????????????????????????????????? ?????????????????????????????????????·???????????????? ?????????????????????????????SQL?Data?????????? ???????????????A?????JPA?????????JPQL(Java Persistence Query Language)?????????????JPQL?????SQL???????????????????????????????????????????????????????????????????????????????????Employee.selectByNameEmployee??firstName????????????????????employeeId????????? ?????????????????????import java.util.Date;import java.util.Set;import javax.persistence.Column;<...?...>/**  * The persistent class for the EMPLOYEES database table.  *  */ @Entity  // ?@Table(name="EMPLOYEES")  // ?@NamedQueries({       @NamedQuery(name="Employee.selectByName" , query="select e from Employee e where e.firstName like :name order by e.employeeId")})<...?...> ?????????·??????OOW?-?JPA Content?-?persistent.xml??????Connection???????????????Database????JTA data source:???jdbc/test????????????????????????Java EE 6??????JPA 2.0???????????????????????????????????·??????????????????????????????????????SQL????????????????????????·????????????·??????????????XML??????????????????1??????????????????????????????????????????????????????????????????EJB 3.1????????·???????????EJB 3.1????????·?????????????????EJB 3.1?Stateless Session Bean?????·????????????????·???????????????????·??????????????????? EJB3.1?????JPA 2.0???????????·???????????????????????XML???????????????????????????????EJB 3.1?????????·????EJB?????????????????????????????????????????????????????????????? ????????EJB 3.1?Session Bean?????·????????????????????????????????????????????????????public List<Employee> getEmp(String keyword)firstName????????????Employee?????? ????????????????????·???????????OOW????????????·???????????????New?-?Other???????????????????????????????????EJB?-?Session Bean(EJB 3.x)??????NEXT????????????????????Create EJB 3.x Session Bean?????????????Java Package????ejb???class name????EmpLogic???????????State Type????Stateless?????????No-interface???????????????????????Finish???????????? ?????????Stateless Session Bean??????·?????EmpLogic.java????????????????????EmpLogic????·????????EJB?????????????Stateless Session Bean?????????@Stateless?????????????????????????????????????EmpLogic????(EmpLogic.java)?package ejb;import javax.ejb.LocalBean;import javax.ejb.Stateless;<...?...>import model.Employee;@Stateless@LocalBeanpublic class EmpLogic {       public EmpLogic() {       }} ??????????????????????????????????????·???????????????????????import??????????????????EmpLogic??????????????????????????·???????????????????????import????????(EmpLogic.java)?package ejb;import javax.ejb.LocalBean;import javax.ejb.Stateless;import javax.persistence.EntityManager;  // ?import javax.persistence.PersistenceContext;  // ?<...?...>import model.Employee;@Stateless@LocalBeanpublic class EmpLogic {      @PersistenceContext(unitName = "OOW")  // ?      private EntityManager em;  // ?       public EmpLogic() {       }} ?????????·???????JPA???????????????????·????????????????????????????CRUD???????????????????·????????????EntityManager???????????????????????????1????????????????·???????????????????????@PersistenceContext?????unitName?????????????persistence.xml????persistence-unit???name?????????????? ???????EmpLogic?????·???????????????????????????????????????????????????????????????????????????????EmpLogic????????·???????(EmpLogic.java)?package ejb;import java.util.List;  // ? import javax.ejb.LocalBean;import javax.ejb.Stateless;import javax.persistence.EntityManager;  // ? import javax.persistence.PersistenceContext;  // ? <...?...>import model.Employee;@Stateless@LocalBeanpublic class EmpLogic {       @PersistenceContext(unitName = "OOW")  // ?        private EntityManager em;  // ?        public EmpLogic() {       }      @SuppressWarnings("unchecked")  // ?      public List<Employee> getEmp(String keyword) {  // ?             StringBuilder param = new StringBuilder();  // ?             param.append("%");  // ?             param.append(keyword);  // ?             param.append("%");  // ?             return em.createNamedQuery("Employee.selectByName")  // ?                    .setParameter("name", param.toString()).getResultList();  // ?      }} ???EJB 3.1???Stateless Session Bean?????????? ???JSF 2.0???????????????????????????????????????????????????JAX-RS????RESTful?Web??????????????????????

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  • Transition domain to new web host without waiting for DNS propagation

    - by jcmoney
    I was considering switching to Amazon EC2 to host my website to handle more traffic. It seems like I would have to update DNS records to point to the new server but I was wondering if there was a way to avoid having to wait for the new DNS record to propagate. Putting the code on both hosts would not work for me since the app writes to a database pretty frequently. I thought about just using a meta redirect or php redirect on the old host to redirect to the new host ip but was wondering if there's a better more accepted way of doing this.

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  • What happens when a server has too many requests?

    - by eSKay
    I am wondering why websites crash at all. If a server has too many requests, it might queue up the request in its waiting lists and serve it when all the earlier requests have been served. That means that the request for the website will be taken care of, although it may take some more time than expected. Then, how do websites crash due to server overload?

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  • How does too many requests make a server crash?

    - by eSKay
    I am wondering why websites crash at all. If a server has too many requests, it might queue up the request in its waiting lists and serve it when all the earlier requests have been served. That means that the request for the website will be taken care of, although it may take some more time than expected. Then, how do websites crash due to server overload?

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  • How does too many requests make a server crash?

    - by eSKay
    I am wondering why websites crash at all. If a server has too many requests, it might queue up the request in its waiting lists and serve it when all the earlier requests have been served. That means that the request for the website will be taken care of, although it may take some more time than expected. Then, how do websites crash due to server overload?

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