java,serializationRelated issues-Collection of common programming errors

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  Liam W
  java android eclipse android-ndk unsatisfiedlinkerror
  I’ve been trying to figure out why I’m getting an error stating the method can’t be found, but everything seems to be in order (at least the things that would cause this error).My Android class:package com.liamw.root.androididchanger;import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView;public class DebugUserActivity extends Activity {Button button;TextView logcat;static {System.loadLibrary(“sqlite”);}@Overri
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  mj_
  java ubuntu service daemon jsvc
  I’m trying to create a service that will run in Ubuntu Linux written in Java. My executable Jar file is a big fat Jar file that has all the dependencies packaged inside with it. I get the following error when I try to run it using JSVC. Java VM created successfully Class org/apache/commons/daemon/support/DaemonLoader found Cannot register native methods java_init failed Service exit with a return value of 1What’s killing me is the “cannot register native methods” line. What does this mean and ho
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  user2907333
  java android cordova
  I’m making an android app which uses bluetooth using phonegap and I’m having issues handling code because it get’s called every 100ms. I want to try if the issue occurs because my phonegap javascript code is to long causing delays. To try this I want to dispaly the received message using a native textbox. Is this possible? and How would I do this?ThanksMartijn PS: I’ve tried using Toast but since I want to change the displayed value every 100ms this doesn’t work.Codeupon receiving a message this
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  Preetygeek
  java c++ winforms jni
  So, i have visual studio consloe project that compile to .dll file. I’ve created simple windows form System::Windows::Forms::FormI’ve created a .java file:import java.io.Serializable;public class MyBean implements Serializable{/*** */static{System.loadLibrary(“MyBean”); }private static final long serialVersionUID = 1L;private static native String getDateCpp();public String getDate(){return getDateCpp();}}compiled it and generate a .h file by javah:/* DO NOT EDIT THIS FILE – it is machine genera
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  Felix
  java javassist
  With Javassist, is there any way to inject code into a native method? In this case, I’m trying to make the OpenGL calls in my game print out their names and values when called, but all my attempts have hit errors when I assume the openGL dll code is added.The method would look something like:public static native void glEnable(int paramInt);Since the methods initially have no body, the only way I’ve found to actually add the code is with something like:CtBehavior method = cl.getDeclaredBehaviors(
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  Can Eldem
  java eclipse leap-motion
  I have a project that uses leap motion sdk. I wrote this project in Eclipse. When I run my program I don’t have any problem because I set my native libraries as it is suggested from configuration. However, when I export my application I can not run my program because Eclipse does not include my native libraries and I am having this error. Native code library failed to load. java.lang.UnsatisfiedLinkError: no LeapJava in java.library.pathMy purpose is create a .jar file which user can run with o
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  Arturs
  java android upnp
  From Android 4.1 (under Wi-Fi Direct service discovery) it is suppose to support native UPnP service discovery.I presume it was developed for Wi-Fi Direct, but the methods available seem to be generic. Even the JavaDoc for methods mention that it searches for all UPnP services on the network and not only WiFi Direct slaves/masters.However, I am failing to implement it so that it works… I manage to set up all requirements and I get positive onSuccess callbacks, but I receive no onUpnpServiceAva
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  TheEnemyOfQuality
  java dll linker jni
  I’ve got a bit of an odd problem. I have a project in C++ that’s basically a wrapper for a third party DLL like this:MyLibrary –loads DLL_A —-loads DLL_BI load DLL_A with LoadLibrary(), wrap several of its functions and generate my own DLL. I’ve tested this in a C++ project and a C# project. Both do everything they’re supposed to do: load DLL_A, make a couple of function calls, and indirectly load DLL_B. The problem is when I build a DLL for java and make the calls through JNI. Everything run
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  user614454
  java android https
  I am trying to make a HTTPS call using Java to a browser that uses the native login prompt.http://blog.stevensanderson.com/2008/08/25/using-the-browsers-native-login-prompt/Currently I’m using the below for HTTP and it works fine for other websites since I know the parameters to put in…however it fails for the above type of login (I am not sure how to capture the parameters…it’s a login pop up..or if this is even the correct approach)….any ideas??..thanksHttpUtility.sendPostRequest(request
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  Karel Petranek
  java java-web-start java-native-interface
  I am using Java Web Start to launch a Java application that depends on some third party native libraries. These native libraries then subsequently load another native library (commonLib) as their dependency using LoadLibrary/dlopen.When not using Web Start, everything works as expected when the native libraries are located in the same directory.Web Start, however, requires the native libraries to be packed in a jar file and referenced in the jnlp file, which I did:<!– Windows OS –><re
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  Kev84
  c# serialization datacontractserializer
  I am currently trying to serialize a List, it serializes (I think fine), but when it deserialize, Sorry for the amount of code, but I am really stuck and have no idea why this is happening, i also tried to changed the struct into a class and no help.THANKS.i get the following error UPDATEDThere was an error deserializing the object of type There was an error deserializing the object of type `System.Collections.Generic.List`1[[A.B.C.DataValues, A.V, Version=1.0.0.0, Culture=neutral, PublicKeyTok
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  sgtz
  c# serialization protobuf-net
  (NOTE: Dictionary where T is some ProtoContract / ProtoMembered class works fine. ) This issue only happened for me with type object. I was trying to serialize a dictionary of Dictionary working. typeof(object) doesn’t work. Should it? Should I implement a string based work around?In this scenario, object will only ever be a .net primitive.[Test]public void De_SerializeObjectDictionary2(){var d = new Dictionary<string, object>();d.Add(“abc”, 12);var ms = new MemoryStream();var model =
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  Android Killer
  java serialization deserialization object-serialization
  I have an object as follows:public class Records implements java.io.Serializable{private int cId;private int pId;private int vlaue;private int tag;public Records(int c, int p, int v, int t){this.cId=c;this.pId=p;this.value=v;this.tag=t;} }I’ve collected lots of data, constructed objects as in the above class and seralized them to disk. One dump thing I’ve forgotten to include in the class file is methods to access the values for each object. For example, to access the cId value for a particular
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  Chris S
  c# unit-testing serialization xml-serialization
  I have a class that serializes a set of objects (using XML serialization) that I want to unit test.My problem is it feels like I will be testing the .NET implementation of XML serialization, instead of anything useful. I also have a slight chicken and egg scenario where in order to test the Reader, I will need a file produced by the Writer to do so.I think the questions (there’s 3 but they all relate) I’m ultimately looking for feedback on are:Is it possible to test the Writer, without using the
• 
  Syg
  wcf json serialization xml-serialization .net-4.0
  I’m going slidely mad over here, maybe someone can help me figure out what’s going on. I have a WCF service exposing a function using webinvoke, like so:[OperationContract][WebInvoke(Method = “POST”,BodyStyle = WebMessageBodyStyle.Wrapped,RequestFormat = WebMessageFormat.Json,ResponseFormat = WebMessageFormat.Json,UriTemplate = “registertokenpost”)]void RegisterDeviceTokenForYoumiePost(test token);The datacontract for the test class looks like this:[DataContract(Namespace=”Zooma.Test”, Name=”tes
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  Tuukka Mustonen
  java serialization jsf jsf-2
  Is it possible to explicitely deny JSF from serializing some component trees? At the moment I am passing a non-serializable object to a h:inputText:<h:inputText value=”#{nonSerializableBean.nonSerializableClassInstance}” />What happens after a few clicks is that I get (during view restoration):javax.faces.FacesException: Unexpected error restoring state for component with id configurationForm:j_idt292:j_idt302:field. Cause: java.lang.IllegalStateException: java.lang.InstantiationException
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  user01
  java serialization
  I’m using a 3rd party library that asks to use only serializable object with its methods. How do I ensure that a java object is serializable ?Sometimes my objects are just a list, a string or a simple POJO.
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  ashwnacharya
  c# .net json serialization deserialization
  So, I have an JSON object where one of the string members have characters like quotes(“) and apostrophes(‘) in them. This JSON object is returned by a third party API (which I have no control over). This is how I invoke this API:var client = new WebClient(); var data = new NameValueCollection(); var result = client.UploadValues(url, data); MemoryStream ms = new MemoryStream(result);So, when I try to deserialise this string like so:DataContractJsonSerializer serializer = new DataCon
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  Abhinav Kumar
  java serialization deserialization
  I know that we have to define methods with the following signatures to override the default serialization process..private void writeObject(ObjectOutputStream os) {} private void readObject(ObjectInputStream is) {}Is there any restrictions on the type of exceptions which can be thrown by the above methods.I know that exceptions thrown by a method are not part of method signature but wanted to confirm..
• 
  blz
  java networking serialization
  I am trying to measure the amount of bandwidth used by my program to send Java objects across the network. I thought I could simply serialise the objects to disk and use the file size as an indication, but this seems to not be the case. What I did was serialise the objects to a file while capturing the network usage with tcpdump: sudo tcpdump -l -i lo port 54544 | tee test_112_512Then to determine the total traffic used I used the following command:cat test_112_512 | grep ‘54544 >’ | awk ‘

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