Hi,I'm currently using the jakarta taglib input in my JSP.With input:select you have to specify the options as a Map.But I want the list to display the values in the same order I added them to the Map!Any solutions? Can I use TreeMap? But then how to configure the Comparator?Thanks for any ...

Hi all,I want to create a class not an instance on runtime. Is there any way to create a class on runtime and then get its intance?Rana.

What is JMS and how does it work. Is it like MSMQThan what server does it use ? JAtin

Given:new String("32323232"), where 32 is the ascii decimal value for blank; How to I get a string of blanks from this?Thanks!

Enumerating the threads in my process was the easy part. But is there a way to programmatically get the stack trace, too?

Ok...I've had enough witht his error and whatever i've tried to fix, i just can't seem to get it to work... Please i need someone to really help me out with this...I am running my java application on MetroWorks, Code Warrior 6.0 My programs run perfect when i run it from the compiler.. I ...

Hi there,My RMI server and client comunicate well when I run both in my local machine. But when I run in diferent machines I get the following error in the client:java.security.AccessControlException: access denied <java.net.SocketPermission computer07 resolve>I've heard something about ...

I'm getting a ClassCastException from a remote invocation whose argument is 'this', an instance of the same class I am calling.The following code illustrates what I'm doing:> class Foo extends UnicastRemoteObject implements FooI {>public void ok() throws RemoteException { ... ...

Hi,My problem is simply stated but does not seem to have a simple solution.I am creating a log file which will contain any number of LogEntry objects (just little serializable objects). This log file writes each object into a file using an ObjectOutputStream. Then, when the log needs to be ...

I have a serious problem using an old-school C library on HP-UX. Everything works fine when I use it by itself, and on Windows everything works fine no matter what. But on HP-UX, when I try to call functions from that library from Java using JNI (java native interface), things get messed up. ...

How can can I realize following code? Compiler wants super to be first statement in constructor. For example in Delphi this requiriment is not mandatory.if (proxyHost != null) {super(proxyHost, proxyPort);} else {super(host, port);}

This isn't so much a problem that needs a solution, as just a request for comment (I already solved the problem):I converted an applet to a stand-alone app by renaming init() as a constructor, and took an hour to figure out why the constructor didn't run. Of course, I didn't delete the void ...

hi , I am trying to prompt a message box which recieves the input userid and password and I need to validate the input .Can any one let me know how to do it.Thanks.

Hi,Ive got an applet that I need to be able to launch a .exe that exists on a client's computer...the applet is going to be signed etc.Ive read that it can do this if the client running it explicitly allows the applet access to the required resources...My problem is I need the applet to run ...

Could anyone tell me how much memory is allocated to each thread spawned by a program using default JVM Options. Are there any JVM runtime options that could change the same. This would be highly benificial for any programmer to allocate a desired amount of memory to every thread spawned during ...

I always wondered if the Java Virtual Machine(JVM) gets interpreted into code that uses say Win32 dll, or if not then what... Every Java call must map to a layer, dll, that has access to the hardware, which I doubt the JVM does. If the JVM does, like Microsoft's JVM, how can Sun write a fast ...

package test;public interface Ya {public void doit(); }this is stored in cd\jdk1.3\test as Ya.java and compiled it in the same directory.NExt i makepackage test;public class make implements Ya{ public void doit() { System.out.println("Hi"); }}when I compile it in cd\jdk1.3\test it sayscannot ...

I ve make a JTree in applet. this applet runs fine with applet viewer but gives "Applet Class not found " message when run in browser ie or netscape.

How can we check if the resultset returns no rows at all.Check it for null does not help even though if it is empty.Thanks,Hamid Mukhtar

Hi,I'm trying to make this window frame scroll graphics, it shows the scroll bar but when I try and scroll it, the graphics disappear. What am I doing wrong?I've tried the other forums but with no success.can anyone help import java.awt.*;import java.awt.Graphics2D.*;import ...

package test;public interface Ya {public void doit(); }I store and compile thisd file from c:\jdk1.3\test as Ya.java.Now packaeg test;public class make implements Ya {Public vod doit() { System.out... } }I store this in again c:\jdk1.3\test and compile from this directory javac make.java I get ...

Hello,Can you please state the differences between a web server and an application server? I'm confused.Can a web server be used as an application server orvice versa?Thanks in advance!With Love,Jai

My understanding of the SoftReference (package java.lang.ref) was that the garbage collector collects SoftReferenced object "only when it determines that where is not enough memory( and objects don't have hard references, of course)). However, this does not seems to be true. I have tried to ...

Correct me if I'm wrong (and give an explanation of why), but it seems to me the the SecureRandom class that can be used for cryptography is, by it's design, insecure. The problem lies is the seed. Now being able to seed your random number generator is great, and very useful. However, it only ...

$ cat Child.javapublic class Child{ public Child(){}//how to Know which owner the object,ParentA or ParentB?public void testParent(){}}$ cat ParentA.javapublic class ParentA{Child a;}$ cat ParnetB.javapublic class ParentB{Child b;}$ ...

hi,I wonder how good RMI works over INTERNET, I got stucked in Chat application:In the code i'm binding the server object using the command:Naming.rebind("rmi://192.9.200.66:5555/server",sobj);and in the client applet i'm looking up the server object using the command:sobj=(serverint) ...

i am using datagram sockets to send and recieve packets with online servers. when i do a certain command the server sends me a packet containing 4 bytes as a form of authentification. I need to then turn these 4 bytes into an unsigned integer, then convert the int back into a byte array so that ...

i want to be able topersist an obj without using serialization.in a jsp you can specify a obj to have a applicationscope. i'm wondering how that can be done withoutusing jsp. can the application server the component is running on hold a reference to it or can the object hold a reference to ...

Hi All,I have implemented a simple RMI server with a simple method. Then, simulated clients using 15 threads calling getting the remore objet reference and calling a method in the server. I tested in my system without any network(localhost).It worked fine for 15 threads, when i started ...

i created a class file , if i execute this class file it has to be always on top if i open any other programms or applications then also this class file application has to show me on the screen top , i meas ti has to show me first and behind all applications which i opend other applications How ...

hi, Here i am having one strange problem.i am running a simple java program on NT that has the following code.public static void main(String[] arg) { while (true) { }}Surprisingly, it is consuming 90 to 99% of the cpu time compared to other processes.Infact, i have to have this loop in my ...

i created a class file , if i execute this class file it has to be always on top if i open any other programms or applications then also this class file application has to show me on the screen top , i meas ti has to show me first and behind all applications which i opend other applications How ...

Well to get back to asking about the RMI ports, I asked before and got a nice reply then. But I still need some more info. RMI uses 2 ports for connections. I need to know how to set these ports on BOTH the server and client side. I know it is possible to set them on the server side with the ...

Does Java IDL supports Corba Event Services? i am supposed to simulate a stock exchange environment. If not, is there any free IDL that support event services?Thanks in advance.Boon Ping

hi!! alli am trying to voice enable my chat application (web-based)....can anybody suggest me right direction..i am going in for java speech API's ...if any body has any idea reagrding this pls help..thanks in advance

In the case of a instance, finallize() method can do it. But when it is a class?Does anyone know the way?

How to i create DLL without using visual c++? This is for creating the shared library to be used for JNI.

I just wanted to know how can i interact with a web browser using Java. Theproblem goes like this.....If i have a Web-Page running in a browser and that web page contains framesthen in such a case how can my java program come to know what is there insidethe frames and what activity is taking ...

The garbage collection in Java can free the object no longer in use for me. But before that, does the garbage collection erase the data first (i.e. set the actual value to zero or some other value)?I asked this question becasue I would like to find out:I define some sensitive data in the ...

Problem:I want to connect to a database on a server inside a firewall. How can this be done? We usually connect to development servers inside the wall by connecting to the firewall, and then telnetting and using a terminal emulator. This is a new problem though, and it's urgent. Can anyone ...

I test the rmi progamminghere are all the files\\\\\\\\\\\\\\\\\\\\\\\\\\\\\myrmi.javaimport java.rmi.Remote; import java.rmi.RemoteException; public interface myrmi extends Remote{public String getStr(String s) throws RemoteException;}\\\\\\\\\\\\\\\\\\\\\\\\\\\\\myrmiimpl.javaimport ...

How can we save x rays to database?

I am using jdk 1.4 beta. I am tryin to invoke a call froma java client using rmi-iiop. But whenever it tries to make a method call, it just hangs. After quite some time, i found out that the stub generated calls ObjectImpl.invoke(object, true) which in turn delegates the call to ...

Is there a way to monitor which objects is really serialized to my ObjectOutputStream. I want to make sure that I do not send a lot of unnecessery objects on the network since references to objects is also serialized.

Hi,I am writing a java application and need to persistently store the data i am creating. My problem is that during development, the objects I am storing may change and could cause serialization errors.Does anyone have any opinions on the best way to persistently store data. I have looked at ...

Help, Java does not allow super to be second statement in constructor. I have tricked the compiler using following construction:Socket.super(System.getProperty("http.proxyHost", host), Integer.parseInt(System.getProperty("http.proxyPort", String.valueOf(port))));So actually super is third ...

hello ppli'm using 2 thread in order to manipulate the input and output streams of a specific socket...the problem is that i want after a command is sendthe result to be shownin my case i can see the commands that i send(using system.out.println) but the results are shown after...this is what ...

Hi all,Why is it possible to receive a java.lang.OutOfMemoryError? I thought that when you ran out of memory, the garbage collector ran. This takes a long time and locks up the processor, so it may be disruptive to clients communicating with the JVM (rmi, servlet clients, etc) but when it ...

Hi to all of you,I'm trying to convert in Java language a Ms Access database into a .TXT (Notepad).If you have any advice, that will be fine.Thank you & best regards.Eddie

Hi all,I read that you could use dynamic proxies (from the JDK 1.3) to build remote proxies that masks the fact that an application is trying to access a remote object. I just can't find anything more than a few lines in that articles ...