Java Programming Concepts

jdbc

reshma raghu — Sat, 21 Nov 2009 02:54:30 -0500

i am having problems connecting DB2 database to my Java application using NetBeans.
Here is the Code:

package app;
import java.sql.*;
import java.lang.*;
import java.io.*;
import COM.ibm.db2.jdbc.app.*;
public class Main {

public static void main(String args[]) throws IOException
{
try
{
//Loads Type 2 Driver
Class.forName("COM.ibm.db2.jdbc.app.DB2Driver");

}
catch (ClassNotFoundException e)
{
System.err.println("Could not load DB2 driver! \n");
System.err.println(e.getMessage());
System.exit(1);
}

Read more ...

Tools and Methods

RE:Rss--Search Engine For Rss Feeds.

Mallepula Narayana — Wed, 18 Nov 2009 13:50:34 -0500

Hi All, I have news RssFeed URL,by using Rss Reader I am able to displaying all news articles of that News RssFeed URL.But my problems is I dont want display all news articles, I want to display selected news articles based on keywords,I mean if news RssFeed consists of sports,education,entertainment,technology etc from that keywords as sports,education, articles I want to display. Thanks in advance. Regards, Mallepula

Enterprise Java

How to learn Designing in Java

sreedhar37 — Mon, 02 Nov 2009 04:39:18 -0500

Hi

I have been a java programmer for few years now. I have learnt java progamming concepts and apis and few design patterns. Now i would like to learn how to be very good at designing java applications on my own. Even thoough i know few design patterns, i am unable to start designing applications. For example, what are the things that i should learn to decide when should the class should be abstract or by looking at a code i should be able to tell that this class should actually be an interface and should have sub classes etc.

Could you please guide me to learn things like these.

Exceptional handling

nagworks12 — Sun, 25 Oct 2009 22:16:03 -0400

Hi
if we get any exceptioon in java code full stack trace will come
which explain what is the root cause of exception.

I want to know how it was implemented,how we get all statements
can someone explaing briefly.

Core Java

I agree

Sat, 24 Oct 2009 11:06:06 -0400
As a developper I must agree that I hate having to relearn syntax and tool/method names for everything I already know. Usually the new language will not bring any advantages unless it is a domain specific language that addresses the problems of the project (concurrency, portability, ...).
JW Talkback

a little help for html parser

fighterJJ — Sun, 11 Oct 2009 16:47:18 -0400

Hi dear,

So, i need help to how can i open this website http://hyle.appspot.com/palinsesto/rai1 and extract on my JVM the text about time 21:00 and text followed ?? (so, i have to extract text from html tags.)

I know the existing extending class public class HTMLParserCallback extends HTMLEditorKit.ParserCallback but i cant' understand how implents it for this my excercise.

is possible my method will be it ?

import javax.swing.text.MutableAttributeSet;
import javax.swing.text.html.HTML;
import javax.swing.text.html.HTMLEditorKit;

Read more ...

joshnguyen

Tue, 06 Oct 2009 21:29:06 -0400
Lần 1: [url=http://www.aaa-ch.net/]風俗[/url] [url=http://www.aaa-ch.net/]デリヘル[/url] [url=http://www.aaa-ch.net/m/]風俗[/url] [url=http://www.aaa-ch.net/area.php?category=2000]デリヘル風俗[/url] [url=http://www.akibain.com/]エロゲー[/url] [url=http://www.pure-soapland.com/i/]ソープランド[/url] [url=http://www.pure-soapland.com/i/]吉原ソープランド[/url] [url=http://chuh.jp/]出会い[/url] [url=http://pc.chuh.jp/]出会い[/url] [url=http://www.erogle.net/m/]デリヘル[/url] [url=http://www.pure-soapland.com/chiiki/susukino/]すすきのソープラ

Read more ...
JW Talkback

java.lang.IllegalStateException: strict servlet API : cannot call getWriter after getOutputStream()

puneet21 — Mon, 28 Sep 2009 02:44:07 -0400

Hi,
My servlet is as follows. It just opens a dialog on the basis of the filetype. The filetype can be html, xml, csv or pdf.

<%@ page contentType="text/xml; charset=UTF-8"
<%
JspHelper jspHelper = new JspHelper();

FlexibleReportJobJspBean jspBean = new FlexibleReportJobJspBean();
FlexibleReportJob reportBean = jspBean.getFlexReportConvBean();
try
{
String reportCode = request.getParameter("reportCd");

Read more ...

Enterprise Java

How to judge the commond called by Runtime executed successfully or not

apachemaven — Mon, 28 Sep 2009 00:19:17 -0400

I use java.lang.Runtime to call some standalone executeable commond (which will open another application do some operation use a comond line manner) in my application,however I can not judge whether the commond is executed or whether it is executed successfully. And someone tell me I should define the standard for judge the success and failture. But I have no idea.

Read more ...

Core Java

SCJP details with free SCJP dumps

kumarfair30 — Fri, 18 Sep 2009 10:07:27 -0400

>SCJP details---just click here

Core Java

Any Link B/n ArrayList and HashMap

Rajendra007 — Fri, 18 Sep 2009 03:09:13 -0400

Hi Friends, Can u give few interview questions which relates ArrayList and Hashmap. I mean how to link ArrayList and HashMap.

Core Java

Multi-thread programming in Solaris platform

vincere — Thu, 17 Sep 2009 09:52:06 -0400

Well, I just read a point of view from the Java book:

For the runtime on a Solaris Operating Environment platform, Java technology does not preempt threads of the same priority.

I don't really believe this point so I install a Solaris 10 X86 version under my VMWare virtual machine.

By running these code, I found some different result:

class Test { public static void main(String[] args) { Thread t1 = new Thread(new T1()); Thread t2 = new Thread(new T2()); t1.setPriority(Thread.NORM_PRIORITY); t2.setPriority(Thread.NORM_PRIORITY); Read more ...
About XML Rajendra007 — Thu, 17 Sep 2009 02:24:01 -0400 What are possible ways XML used in j2ee WebApplication.Like storing data in to database and for data transfer .Apart from this any uses. Core Java About XML Rajendra007 — Thu, 17 Sep 2009 02:17:44 -0400 What are possible ways XML used in j2ee WebApplication.Like storing data in to database and for data transfer .Apart from this any uses. Core Java javax.servlet.ServletException: Exception creating bean of class ghazaal — Fri, 11 Sep 2009 16:33:44 -0400 Hi, I got the following error while running sample struts application. I would appreciate any help. struts version= 1.1 Read more ... Community Discussion Display JComboBox in a JTable ttelloow — Thu, 10 Sep 2009 11:16:33 -0400 Help!! I've managed to get a JComboBox into a single cell in a JTable but it is not visible as a JComboBox unless the user actually clicks on it. I'm assuming it is possible to make this component visible.. Thanks in advance Ben Tools and Methods java program kalyanbv1000 — Thu, 10 Sep 2009 10:30:34 -0400 define a class name student.In clude the following members(at least these,possibly others): Data members(all must be in PRIVATE) name(string) GPA(double) rank(char)-possible values are 'f' (freshman), 's' (sophomore),'j' (junior),'r'(senior) NOTE: Values for the 1st 3 data members for each student object are read in from the command line. Method Members a get and set methods (each one public) for each data member eg:public void setName(String sName) eg: public String getName() Read more ... Core Java What is the Main Use of Class.forName() Methods kk1687 — Tue, 08 Sep 2009 11:10:23 -0400 Hi All, Can someone put lights in to the topics 1. Advantages of Class.forName() methods 2. The Best Practices that we can do to make use of the Advantages Thanks in Advance. Core Java Multithreading in Java manjulx — Sun, 06 Sep 2009 09:00:50 -0400 Multithreading Usually a program has logic to execute and some objects or data to modify. In a single threaded system program executes in a sequence line by line. Multithreaded system can allow multiple threads to execute a program parallel in multiple instances. If there is any part of code dealing with the object data modification, there is no guarantee that it will not be attempted any more than one thread at a time. Read more ... Community Discussion Make reflection as fast as direct calls iirekm — Sat, 05 Sep 2009 07:12:29 -0400 Probably most programmers know reflection: it’s a quite easy way for adding dynamic (scripting-like) possibilities in static languages like Java or C#. Unfortunately, reflection is blamed for being as slow as scripting languages – even few hundred times, however this can be easily optimized. In this article I’ll show you how to make reflection as fast as direct usage of methods or fields in class. Read more ... Core Java SWING nitinise — Sat, 29 Aug 2009 03:03:21 -0400 HERE IS CODE BELOW I USED import javax.swing.JFrame; import java.awt.Container; import javax.swing.JList; import javax.swing.ListSelectionModel; import javax.swing.JScrollPane; import java.awt.Dimension; public class ScrollList extends JFrame { final int defaultValue = 20; private javax.swing.JLabel jLabel1; private javax.swing.JLabel jLabel10; private javax.swing.JLabel jLabel11; private javax.swing.JLabel jLabel12; private javax.swing.JLabel jLabel13; private javax.swing.JLabel jLabel14; private javax.swing.JLabel jLabel15; Read more ... Community Discussion How to create checkboxes at runtime? stevev — Tue, 28 Jul 2009 20:29:26 -0400 Hi, I have a need to create a checkbox list based on the contents read from a file at runtime. Once established, the user selects/deselects the approriate item checkboxes and then clicks a button to process those selected checkboxes. I have seen plenty of examples where the checkboxes are known prior to runtime, but for my application, this is not possible. Thanks for any assistance object oriented anshu77777 — Sat, 25 Jul 2009 01:10:00 -0400 is java a Fully Object oriented language or not give me the reasons for each of ur answer. Core Java object oriented anshu77777 — Sat, 25 Jul 2009 01:07:32 -0400 is java a Fully Object oriented language or not give me the reasons for each of ur answer. java anshu77777 — Sat, 25 Jul 2009 00:32:19 -0400 what is means of creating an object in java.what happen internally when we create object and how it accessed. how compiler treated object.