Hi, I am new to EJB. I have a requirement of calling a method of remote stateless bean and setting a value, before calling any method on the same bean. The value set from first method call should be available to second method. I know that a stateless bean can't hold instance variables values for next calls. Is there any alternative to m...
So I have what I think is pretty good code for a sudoku solver in java but I need some help with this method. It gives me a stack overflow when I embed it in a main method. The problem is that my method doesn't know how to turn around and fix its mistakes. I need a boolean flag (one that, unlike the one used in the code below, actually w...
Please help me For the form validation using the java by interacting with the oracle database(i mean user and password validation). Thannks In advance Ram ...
Okay so I'm trying to learn Java client/server stuff, and am going through the tutorial code as follows. When I change "localhost" to my ip it stops working though. Please help. Edit: "127.0.0.1" seems to work too, but not my real IP. /* * Copyright (c) 1995 - 2008 Sun Microsystems, Inc. All rights reserved. * * Redistribution and ...
Not sure how to title this... So I've got three child classes of Event: WeightEvent, TimedEvent, RepEvent. Through whatever means, I get an object of one of the children. Now I want to send that child event to a method in another object so it can pull the data from it with the getSavedEvents() method. The method only exists in the child...
Hi, I have this method in my database class.and I want to get a part of data from a column which is "dateOfBirth" in MySQL table ,but I don't know why the list.size() is "0" but when i use System.out.println() in my code it will show just the first line of sql table ,although I have two rows!!! my method: public static int getBirthP...
Hi, I'm compiling an open source project with "mvn install" but ended up with java.lang.OutOfMemoryError: Java heap space. I tried to execute java -Xmx256m but the output was java synopsis which indicated it's an invalid command. I'm using jdk1.5.0_08, any ideas why this is happening? Thanks, ...
When I create a multi-threaded program and I use methods such as Wait or Signal to control threads among other things, does JVM control all the thread state changes or does the underlying OS have anything to do with it. ...
I'm writing a RESTful Java server with CXF framework. How do I can write a @Path Regular Expression in order to obtain any URI finished in "/action" value? ...
I use GWT for UI and Hibernate/Spring for buisness-layer.Following GWT widget is used to display the records.(http://collectionofdemos.appspot.com/demo/com.google.gwt.gen2.demo.scrolltable.PagingScrollTableDemo/PagingScrollTableDemo.html).I assume the sorting is done in client side. I do not retrieve the entire result set since its huge...
We have: class A{} class B extends A{} class C extends B{} class D extends C{} we can define Lists like: List<? super B> lsb1 = new ArrayList<Object>(); //List<? super B> lsb2 = new ArrayList<Integer>();//Integer, we expect this List<? super B> lsb3 = new ArrayList<A>(); List<? super B> lsb4 = new ArrayList<B>(); //List<? super B...
We are developing an application for obtaining the information of a running java application using JDWP and JVMTI. Sun Java comes with a reference implementation of JDWP so using agentlib -jdwp: will use the reference implementation. Our aim is to study JVMTI and write JVMTI agents to get specific detail. Also creating a Front end using ...
My server keeps getting this error when I run the client: Exception in thread "main" java.io.EOFException at java.io.DataInputStream.readInt(Unknown Source) at java.io.ObjectInputStream$BlockDataInputStream.readInt(Unknown Source) at java.io.ObjectInputStream.readInt(Unknown Source) at MyServer.main(MyServer.java:10) H...
I have a java web application sitting on Tomcat/Apache. I have a form which has to send email. What is the best way to get this working. ...
Hi, Imagine, I want to write a useless method called: isInstanceof that returns a boolean. I was thinking about it. But I do not get out. An instanceof has to be used like: [object] instanceof [a classname] // I was thinking about something like this public static boolean isInstanceof(Object obj, /*magic for the second param*/) { r...
Hi, We know Java supports only "pass by value" .If I pass a collection for eg., a hash table to a function then the modifications to this collection inside the function should not be updated outside this function.But this is not the case in Java?.How do we conclude this? Please anyone conclude this discussion with a proof... ...
Is there a widget for Swing that behaves like a JLabel, that automatically reflows the text if its dimensions have changed? For example: Large horizontal space available: +--------------+ | Foo bar baz | +--------------+ Small horizontal space available: +---------+ | Foo bar | | baz | +---------+ I am currently using JEditorPa...
Hi all, I was wondering if there is a (java?) API parsing a WSDL and returning a structure of the WSDL as well as a description of the schema. I know a tool like wsimport can generate the stubs for a java client but I would also like to create the graphical interfaces (java swing, html...) for sending and receiving some simple requests...
We have next code. Sometimes we should wait 10-20-40 seconds on the last line. What can be the problem? Java 1.4 URL url = ...; HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setDoInput(true); conn.setDoOutput(true); conn.setUseCaches(false); conn.connect(); OutputStream out = conn.getOutputStream(); ObjectOu...
I'm building a web service in Java from an existing WSDL. The wsimport tool has generated all the Java classes bound to the elements in the service's schema. In particular, the fault declaration yields the following class: @javax.xml.ws.WebFault(name = "Fault", targetNamespace = "http://my.company.com/service-1") public class ServiceFau...