hii've found in so many articles that DOM is not serializable. but once i made a DOM document and passed that document object to client thru rmi. is document object of DOM really serializable?thanx

Good morning,i have a j2ee client (swing) and server (EJB and JBoss A.S. ) application and have set up jndi.properties so that rmi works via http modifying this two ...

I have written a java program to create an LDAP user. Sometime it works fine but sometimes it gives error. Detailed error is given below:--createLDAPAgencyUser() : Inside Exception - javax.naming.directory.InvalidAttributeValueException: [LDAP: error code 21 - Invalid Attribute Syntax]; ...

Is it possible to read and write both audio and text into a socket i.e is to possible to differentiate between text and audio from the socket ? Please help me with code snippet

Hi everyone,I have a problem with my custom connection pool, please give me your advice as you can.I'm developing a connection pool service at each client. Whenever the service start up, based on its configuration, it'll make a certain connections to servers in server clusters, and keep those ...

Hello,I want to Parse a doc/odt file and extract text with a particular font tag, convert this text using our converter and then put back the converted unicode text into o/p file in place of the extracted fileand rest of the file remains intact.

I m trying to write an FTP code. I got a sample code from the java forums. It has an upload method with ftpServer, user, password, filename and source as parameters that have to be passed to it. It also has a download method with ftpServer, user, password, filename and destination as parameters ...

Here is a variation on the Producer / Consumer with 4 puts and 4 gets. I don't understand why the notifyall is not causing the Saver thread to awake. I would appreciate any suggestions.import java.util.*;public class SpendnSave {Float Balance = new Float(0); // Account Balanceboolean ...

Hello,I have some problems running an applet using a proxy.The applet loads a serialized java object in the init method.Everything works fine when not passing through a proxy.Now I have some users that must use a proxy.I have tried to set the proxy programmatically, by configuration through the ...

Hey all. I was just wondering if someone could give me an outline, or a VERY general explanation of how i should organize this. What I am doing is whenever a client connects to my server (via an applet) they will be able to move a box around with the arrow keys, and they will be able to see ...

Hi all!Can anyone please advise me on how should i convert a multiarray to an arraylist. each array in the multiarray is of various lengths.i cannot create arraylist manually because the number of ti as in the code might varies. The existing code goes like this:public static void ...

I want to read the stdout from a process that I am starting with exec(). My code does:p = Runtime.getRuntime().exec(command, null, dir);stdOut = new BufferedReader(new InputStreamReader(p.getInputStream()));while (stop_called == false) {if (stdOut != null) {int readBytes = 0;try {if ...

// Simple server application:ServerSocket serverSocket = new ServerSocket(port);Socket clientSocket = serverSocket.accept();InputStreamReader isr = clientSocket.getInputStream();//... read inputs from client...isr.close();clientSocket.close();serverSocket.close();// Simple client ...

Hi,I am trying to retain order if a list in which user enters values. So, I am using ArrayList. Here is my implementation -myclass has two members - private String name;private List<Person> plist;//In my mainList<myClass> mlist = new ArrayList<myClass>();for (myClass mcl : ...

hi. i am making a messenger program. in the server side i have created a vector which is supposed to store all the Printwriter objects in it and then after each message sent by the client it is supposed to iterate through the vector objects and send all the clients the messengs. like in a chat ...

Why the array has the size atribute in 0 and the size() method returns 1?Which is de difference from delegate and elementData attributes?How is it works? http://img399.imageshack.us/my.php?image=pantallazova1.pngThanks,Regards.Neuquino

Ok, i fixed the freezing problem, but another problem has arisen.All i want to do is send an integer from the server... to the client. It's very simple. But all the methods from the StreamReaders... that are all like "read()" and "readLine()" Are they waiting for input? because i don't want ...

hi,Im building a network tool, where Im invoking the native methods in windows to get command prompt to "tracert <ip>".I get an output like this,Tracing route to [10.0.2.2]over a maximum of 3 hops: 1<1 ms<1 ms<1 ms 192.168.1.1 2822 ms809 ms 1383 ms 220.247.232.7 3 1049 ms 1203 ...

Up until now, I knew that if two threads use the same variable and one of them updates it, the other thread might not see the updated value for an extended period of time. Therefore there is the need to synchronize the access to this variable OR make the variable volatile (visibility of ...

Is it possible to get the html source of a web page without using URL or URLConnection classes. can we establish a socket with the webserver and get the content ? If so help me with the code

Hello,i have created a Server-Client application with RMI. But there are many questions:I want, that only clients could connect to the server who have authenticate at the server. By this reason i only bind the Login-Method at the registry. In the Login-Method i check the Name and Password. If ...

Hi.Given the following classes A and generic B:class A{ public void method(Class<? extends Number> c) {}}class B<T>{ public void method(Class<? extends Number> c) {}}The following lines produce compiler errors, as expected:A a = new ...

I have a dns server such configured that it returns the ip addresses in a loop i.e.if u first hit the dns it will return Adresses: first-ip , second-ip and if hit again wil return secondip,firstip. To get this try nslookup voiceservices.mcleodusa.com on command prompt twice in succession.Now ...

Hi , Actually i am fetching data from client after 2 or 3 seconds. i am trying to store all the information in a HashMap. I want this hashmap to be static so i have declared it static so that it can save All the values i recieve. Problem is that it saves only 7 Values and then i think Revised ...

I receive a Hashtable from people working on the back end of the application. I am trying to convert the Hashtable with key/value pairs into an ArrayList, which is an array of a bean class with two properties: country code and country name.I do not have compilation error nor runtime error. But, ...

Hello,I'm writing a HTTP-Proxyserver and I want to compare the cached Expires-Header with the actual date, so I need to convert the Header Object which I get from "httpclient" (jakarta) to a date Object. I tried the following:/** Expires Header format. */private final static DateFormat ...

abstract class VertexSetGraph<T> implements Graph<T> { ... private Set<Vertex><? extends T>> _verticies;... public boolean addVertex(Vertex<? extends T> vertex) {_verticies.add(vertex);... }}I don't understand why the compiler allows this. Lets say I ...

Hi, I've noticed that the resume and suspend functions are depracated for the Thread class. It there an easy way to pause threads and restart them? Sorry, If this is really basic... still kind of new to Java.

Hi,My current application consists of a main thread which spawns multiple threads on startup. The main thread is like a daemon thread which is supposed to continuously run and monitor the threads it had spawned. As long as the main thread is running it has the handle of all the threads it had ...

We have a problem in which, on certain machines, a Java Telnet client connected to a specific host will lock up, and crash the TCP stack of the machine it's running on.On the test box we're running it on (Win2k running SE 1.6.0_01-b06), the problem occurs during initial negotiations: after ...

Hello everyone,Short version: I would like to hard-code into the application the self-signed certificate of an internal-only HTTPS server, so that I don't have to install and maintain special keystores on hundreds of users' machines.Long version:I'm working on a simple application that will ...

Hi everyone,I wanted to write a very simple program: it is supposed to count how manythreads are accessing the same array field at the same time. Here is the code:import java.util.*;class MyRunnable implements Runnable {private static int[] count=new int[10]; // the real counts of threads at ...

There is a lot of information on the web that waiting thread can be awaken by JVM orsome other code (not written by you anyway ...). How is it possible ? And secondly, if that can happen, why can't it happen to Thread.sleep() ? It ceases the thread and puts it into - and here another question: ...

Hi there.I hope somebody can give me some direction about running multiple servers on one machine. The requirement is that there is only one IP address for the machine and only one port number can be used, although there is more than one server.I am new to network programming and have no clue ...

I am writing a multithreading web page fetcher under windows with jdk1.5.0-09. I have a task dispatcher like this:public void run() {while (true) {try { if(_fetcherPool.getActiveCount()<_config.numThreads){_fetcherPool.execute(new RobotstxtFetcher(_crawler, getURLQueue().take())); } else ...

Hi all, I would like to know if there is a class that would store a range of IP's once the range is specified. E.g.,Say i allot the range 202.79.36.25 to 202.79.37.112. Is there a class that could keep all ipAddresses lying between the above mentioned extreme ...

public class GenericHibernateDAO<T,ID extends Serializable> implements GenericoDAO<T,ID> {private Class<T> persistentClass;private Session session;public GenericHibernateDAO() {this.persistentClass = (Class<T> ) ((ParameterizedType) ...

When do we go for collections and when do we go for maps?map store key/value pairs,do collection use keys?If so,wat is the diff b/w map key and coll. key internally?

Hello,i'm trying to implement a client/server code where the clients can send serialized Objects while reading incoming ones from a server.To simplify the example i only serialize String (But i plan to serailze more complez object, so i want to use Object serialisation)here is what i've ...

I created a program for chat using rmi..I extends UnicastRemoteObject in both server and client sides...And after compliling the server is running smoothly but client is holding the following errors...error:java.rmi.ServerException: RemoteException occurred in server thread; nested exception ...

Hello,I use Java NIO, non blocking for my client-server program.Everything works ok, until there are many clients that sending messages at the same time to the server.The server can identify all the clients, and begin reading, but the reading of those multiple clients are always the same ...

I had connected to the AD // Create the initial directory contextDirContext ctx = new InitialDirContext(env);Attributes attrs = ctx.getAttribute("DC=DomainDnsZones,DC=testing,DC=local");but I had no idea wat to get from the attrs.get method.as in, I don't know what kind of attributes ID are ...

Hi,i have to redesign a class, say X, in such a way that i manage multiple threads accessing a single instance of the class, we cannot create multiple instances of X. The class looks like this:Class X{boolean isACalled=false;boolean isInitCalled=false;boolean ...

i have a datagram client which checks how many servers are alive on the network now i get these two excpetions "help "datagramsocket is the name of main() class>at java.net.PlainDatagramSocketImpl.receive(PlainDatagramSocketImpl.java:136)>at ...

Hi,There's an application that is pushing some data to my local computer on some port, say 6666. I am using netcat to read from this port and I'm pushing this data into a file.like:-$ nc -l -p 6666 > output.txtNow I want to do what netcat is doing in Java, that is read from port 6666 and ...

Hi All,I've to write code which communicates between java code and C code through Socket programming. I've to read some information given by C program and to show that information through a Java GUI application. So I need to use Socket programming for that.Can anyone suggest how is it ...

Hello,I plan to develop a multithreading tcp/ip server. But it is necessary to use the SocketServer and Socket class? Does anybody know a nice framework that support developing a network server?regards,Rookee

Serialize and Deserialize with Oracle 9 and Oracle 10We have developed a client/server application. Client is a Java application and Server is written in C-Language; link between Java and C is RPC/JRPC.We have to serialize and then deserialize a stream in a clob field in Oracle DB. When we ...

Hi friends,I wrote a small HelloWorld application using RMI. I listed all the files below.Hello.javaimport java.rmi.*;public interface Hello extends Remote {public abstract String sayHello() throws RemoteException;}HelloImpl.javaimport java.rmi.RemoteException;public class HelloImpl implements ...

Emp e=new Emp();Class.forName("Emp").newInstance();can anyone explain the diff b/w two statements?