Community Discussion

rewriting your product?

giladmanor — Sun, 27 Dec 2009 01:50:20 -0500

* ... Fantastic idea, since we already know how to solve most of the problems we can do it much faster this time...
* ... As long as we don’t touch the spec, just migrate to a better technology...
* ... Only with a spec that includes new user stories ...
* ... Never rewrite your product ...

Community Discussion

Why float type cast

parveen.gupta.23091987 — Tue, 31 Jan 2012 07:10:53 -0500

in java why float we has to be type cast i.e. float a = (float)2.3; and and if 2.3 is consider as double then why there is a need for that ???

Community Discussion

Java AVL tree

mgau0047 — Tue, 03 Jan 2012 07:42:12 -0500

Hi i am making an AVL tree and i am having some problems in the search method, because a null exception error is given when the program is ran. Here is my code. Can you pls implement for me the search method so the program will run. Thanks in advance

package testavltree;

import java.io.IOException;
import javax.swing.JOptionPane;

/**
*
* @author Rapapc
*/
public class TestAVLTree {

public static void main(String[] args) throws IOException, Exception {
System.out.println("your inorder traversal is:");
AVLarray process = new AVLarray();

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Core Java

Ballistic Line help

mi_para — Fri, 16 Dec 2011 07:59:29 -0500

Okay so, here is what I have so far, I am constructing a program that will eventually take a user input angle and velocity and display the ballistic path of a notional projectile, sans friction and whatnot.

I have yet to build the user defined variables, I am just trying to get the polyline to display in the frame with a pre-defined angle and velocity. Somewhere down the road I would like to animate this, but for right now I am just trying to make it display on a Canvas.

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Core Java

Gotfocus event

sjohnfernandas — Thu, 15 Dec 2011 07:56:52 -0500

when we use shift+tab the controls goes back and select the value in the field
how can we do the same programmically through java swing

Community Discussion

Database data doesn't fill into JTable

neocorp — Tue, 13 Dec 2011 02:09:07 -0500

I've been working on this code for couple of days. My procedure on the database works fine but it doesn't fill into the table. I'm going through the code again and again but I can't find what's wrong... The error I get is: JavaNullPointerException and the line involving is the piece of code that returns notes.length. Here's a piece of my code:
private Object[][] notes = null; setUpStatusColumn(noteTable, noteTable.getColumnModel().getColumn(2));


protected JTable createTable(GradesModel gradesModel) {

        return new JTable(gradesModel);

    } 

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Core Java



Text to speech without using TTS
sridharkosna — Thu, 08 Dec 2011 05:48:10 -0500
Hi All,

      My requirement is to convert a string value to speech without using TTS (freeTTs). how can i achieve this? can anybody give me some idea. it could be helpful.
Enterprise Java



Hibernate query for joining two tables.
lofa in — Mon, 14 Nov 2011 05:40:09 -0500
I need to join two tables User and Employee. And the query will be like,
List list = hibernateTemplate.find("from User u left join fetch u.employee e");
So what I have to do in the User,Employee POJO.

SQL requirement is SELECT userName,firstName from Employee as e LEFT JOIN User as u ON u.userId = e. userId.
Tools and Methods



regarding row reading from Mysql ..
krishna523 — Mon, 14 Nov 2011 01:33:50 -0500
i am trying to read rows from mysql database.like 
............

.........

while(rs.next){
x=rs.getstring("columnname");
}
my question is when a row is readed some action is to be perfromed.but in this case control goes to next row before completion of task.
how to handle it ,please help me if anyone aware of it.
Thanks ,

krishna umareddy.
Enterprise Java



How to manage a dbms with multimedia content in java - jdbc(client /server)
arunrajp — Mon, 07 Nov 2011 09:54:46 -0500
I am an old timer from the 90s so java7 is a bit of a shock to me as ima an SCJP for java 2 platform from 2000.
Please suggest the best way to manage a multimedia databse containg (*.jpg and *.au) files in a DBMS or RDBMS using JDBC for both client(Standalone java application) and server side(Servlets).
Enterprise Java



How to remove prefix from target namespace
hemant89 — Thu, 03 Nov 2011 03:28:29 -0400
Hi All, 
I am new to this forum.

I am working on java web services. I am using "wsdl2java" tool to create a java stub file.

In my wsdl file value of targetnamespace is "urn:HPD_IncidentInterface_Create_WS" but i want to remove this urn prefix from java stub file.

I can't change wsdl file as it is application generated so is there any way to do this. 
Thanks
Tools and Methods



Deploying Jackrabbit to JBoss AS 7
srikanth.s.nair — Thu, 20 Oct 2011 05:09:17 -0400
Here are step by step directions on how to configure Jackrabbit  to JBoss AS 7.
1. Create directory for the jcr deployment

$ cd $JBOSS_HOME/modules
$ mkdir -p javax/jcr/main
$ vi module.xml


Add the following snippet to the newly created module.xml file

<module xmlns="urn:jboss:module:1.0" name="javax.jcr">
  <dependencies>
  <module name="javax.transaction.api" export="true"/>
  </dependencies>
  <resources>
    <resource-root path="jcr-2.0.jar"/>
    <!-- Insert resources here -->
  </resources>
</module>


Copy the jcr-2.0.jar to 

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Tools and Methods



Setting Oracle Datasource in JBoss AS 7
srikanth.s.nair — Thu, 20 Oct 2011 04:06:54 -0400
Here are step by step directions on how to configure JBoss AS 7 to communicate with Oracle XE.
1. Create directory for the oracle driver deployment
$ cd $JBOSS_HOME/modules
$ mkdir -p com/oracle/ojdbc6/main
$ vi module.xml


Add the following snippet to the newly created module.xml file

<module xmlns="urn:jboss:module:1.0" name="com.oracle.ojdbc6">
  <resources>
    <resource-root path="ojdbc6.jar"/>
  </resources>
  <dependencies>
    <module name="javax.api"/>
  </dependencies>
</module>
 

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Tools and Methods



License Terms for Java Code @JavaWorld
sacgaw — Mon, 17 Oct 2011 13:06:12 -0400
Hi,

What are the License Terms for usage of code published on JavaWorld as an application ?

Thanks

-sacgaw
Core Java



Unable to create soft-link in ubuntu
r4jiv007 — Sat, 15 Oct 2011 02:31:03 -0400
hello,
i m writing an app in which i want to create soft-link of files. I m using java for that and my code is :-
public static void crtsftlnk(String trgt, String sftlnk)

{

try {

Process proc;

Runtime rt = Runtime.getRuntime();

proc = rt.exec("ln -s "+trgt+" "+sftlnk);

BufferedReader br = new BufferedReader(new InputStreamReader(proc.getInputStream()));
String line;

while ((line = br.readLine()) != null)

{

System.out.println(line);

}

} catch (Exception e)

{

//e.printStackTrace();

}

} 

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Tools and Methods



String Tokenizer...Confused on what to do next
andimiami — Wed, 05 Oct 2011 21:41:43 -0400
Hello! I am a student (obviously, haha), and I am confused about how I need to do something in my driver class. I have a text file that I am reading in, then I decided to use a string tokenizer to parse the data. Now, I need to store the data to something, and then I have two other classes that I had to create in accordance with lab specs, and use them to get a specific output. I know the classes don't interact, but once I parse this string, how should I store the data and then call the other classes to use this data to get my output? I can't find an example of what I am trying to do. 

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Community Discussion



Between Google and Oracle
frank0182 — Sun, 18 Sep 2011 22:44:44 -0400
This was the first I read about the lawsuit between Google and Oracle over the way Google's Android uses Java. Very interesting. I am a heavy Java and Android user of both, and hope a resolution is made that keeps Java running on Android smoothly.
Mobile Java



Copy text from EXCEL in to Java
redrasp12 — Tue, 13 Sep 2011 15:31:05 -0400
Daily grind at work requires me to copy and paste text in to a Java based company intranet web page. This is a labor intensive task due to the volume of data needing to be input. Using my mouse all day for this task is insane.
How is it possible to copy text from EXCEL and paste it in to a java based web page using VBA from Excel? Please describe as many characteristics of this process as possible and sources of potential VBA code.
Tools and Methods



Access remote linux file using web application deployed in another linux server using SMB
narvava — Tue, 28 Jun 2011 01:29:07 -0400
Hi,
Is it possible to access remote linux file using an application deployed in another linux box using smb protocol. If it is, could anybody please explain how to or post some sample code.
Regards,

Naresh
Core Java



Java Application
pedrito287 — Wed, 22 Jun 2011 09:11:34 -0400
Hi all,
I'm in the process of creating a java application for users to create electronic timesheets.  After I'm finished with coding, how can i make my program a file that users can run on their machines as an actual application?  
Users are all using Microsoft XP if it matters.
Community Discussion



Visuam Vm
saranya1211 — Thu, 02 Jun 2011 01:59:37 -0400
How to check the field values in Visual VM.It shows the heap memory details. In Class tab it contains many classes and each class contains many fields.

I thing this is machine understandable. Ex:Class Name is java.lang.Object and its have many fields.

Suppose i used only one variable in the program(x) and i set the values to that variable, where i can find the value in visualVM.

Thanks in advance......
Tools and Methods



Differece between overloading and overriding
raju2011 — Mon, 30 May 2011 12:07:53 -0400
Hi,
Can any one differentiate method overloading and overriding.
please reach me ASAP.
Core Java



continuation
samcheri — Mon, 23 May 2011 08:26:41 -0400
The system seems to have cut off the last part of my post; here is the rest:

          }while(i 

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Community Discussion



PDF Renderer / multipage pdf
samcheri — Mon, 23 May 2011 08:11:36 -0400
just starting to learn java; am tryng to use PDFRenderer to show pdf files (mainly multipage music scores); Use Netbeans 7 IDE; the program structure is like this: File selector to select the pdf file

           Text field to enter the no. of seconds (user-defined) between the

           pages of the pdf
           Code to render the pdf and show it page by page with the

           user-defined delay between pages
           The core code to render the pdf and the delay between pages:

           "filename" and "timepassed" are passed after getting these from the 

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Tools and Methods



Oracle Database Installation Windows
togotutor — Wed, 18 May 2011 23:52:18 -0400
In this tutorial, we are going to learn on how to install Oracle database on windows operating system.

http://www.togotutor.com/oracle-database/install-oracle-database-windows...
Tools and Methods