Java Language

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Sat, 20 Feb 2010 04:30:11 -0500

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hashCode help

Alpdog14 — Fri, 19 Feb 2010 10:53:49 -0500

I am trying to implement a hashCode method to return the last few chars of a word or number inputted using my JUnit test. Here is my current method:

@Override
public int hashCode(String value){
	String test = value;
	int hash = 1;
	int len = test.length();
	System.out.println(len);
	for ( int i=0; i<len; i++ )
	      {
	      hash = 31 * hash + len;
	      }
	   return hash;
}

How to create chart based on ResultSet

reea — Fri, 12 Feb 2010 15:25:19 -0500

Hello,

Can anyone tell me how can I store results from a database (more than 1 column) so that later the data can be passed to a method that creates a chart?

Thanks

thanks

Fri, 12 Feb 2010 03:51:07 -0500

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Hats off!!!

Wed, 10 Feb 2010 08:13:15 -0500

Indeed Java is the T-model for Tech industry.

JW Talkback

Question about using Threads

afs — Thu, 04 Feb 2010 21:33:32 -0500

I am trying to write a script in Java but need some help. I studied threads long time ago and have forgotten about them. So I need some help. I am basically trying to drag an object present on a webpage to a new location on the same page. While I am dragging this object I want to take screenshots of this drag event.

Now I have a method drag() which does the drag and drop. Another method captureScreenShot() that captures screen shots at a time.

Read more ...

Thank you for the summary

Wed, 03 Feb 2010 05:52:40 -0500

It was very informative and concise

JW Talkback

java codes

aarthimanikandan — Fri, 22 Jan 2010 06:24:18 -0500

i need java coding for storing image and retrieving the image from the database(oracle) using the histogram of that image plz give a model coding for this kind

Core Java

Developing RIA apps using Java

stevejones — Thu, 21 Jan 2010 12:06:47 -0500

I'd like to know can we developing RIA Apps (Rich Internet Applications) using Java related web technologies?

Please let me know.

Thanks...

Jsp source not found

jadeite100 — Fri, 15 Jan 2010 01:13:52 -0500

Hi All:

I am using Eclipse 3.5 and the Tomcat 6 and Weblogic 11g.
I download the Oracle Eclipse Plugin "//download.oracle.com/otn_software/oepe/galileo". When I debug the jsp with ecliipse and Tomcat 6, it gives me the error "Source not found". It cannot find the jsp but it gives me the line number it is on in the jsp. Also in debug mode, under Variables tab, it shows the list of variables and their value. I started Tomcat6 within Eclipse.

I have the same problem with Eclipse 3.5 and Weblogic 11g. I started Weblogic 11g within Eclipse.

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Enterprise Java

is it just me or am I missing something

ilupper — Thu, 14 Jan 2010 15:45:30 -0500

Is the method description mistakenly repeated in Javadocs for Node.getTextContent() and Node.setTextContent?

ArrayList question

Kilo — Fri, 08 Jan 2010 00:39:47 -0500

Hi there,

I recently started studying for the SCJA exam using the McGraw-Hill SCJA Study Guide (it's a lot tougher than what we do in college, but that's another story). Anyway there was an exercise to create an ArrayList of floats and then iterate through them.

The problem i'm having however is that when i try to use float i get the following errors:

C:\Documents and Settings\John\My Documents\SCJA\Exercise2_11.java:10: cannot find symbol
symbol : method add(double)
location: class java.util.ArrayList
fishLengthsList.add(10.00);
^

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Ascending Order Swap String

sanjiv_raje — Sun, 27 Dec 2009 21:44:04 -0500

Hi Friends,

Here is the code to swap the strings in an array in the descending order. Can you help me to tweak this code to swap the strings in the ascending order? Thanks for your help in advance!

class swapstr { static String name[]={"Chennai","Mumbai","Delhi","Agra","Andhra","Patna"}; public static void main(String args[]) { int size = name.length; String temp = null; for (int i=0; i Read more ...


Community Discussion



Question about strange NullPointerException
ybjoony — Wed, 23 Dec 2009 08:50:09 -0500
This is my code about roughly counting character counts by adding lengths of the each file names given by command line arguments... Strangely, it generates NullPointerException on line 50(ch += in.readLine().length();) if implemented without the println method above it; but if I implement the println, and then run it, the method commences with no problem. I wonder why this is happening. Can somebody help?
Code is like this...
package chapter2;

import java.io.*;

public class exer13

{

	public static void main(String[] args)

	{

		if(args.length==0) 

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Java Native Access
pavankumar A — Wed, 16 Dec 2009 07:12:40 -0500
Hi,
     I am new to java native access (JNA).

Actually iam working on accessing dlls and calling native methods using java(jna).

I want to know equivalent code in Java for this "Marshal.PtrToStructure"  which is in C#.

Any one can help on this topic.
Thanks in advance.
Regards

Pavan Kumar A.
Tools and Methods



Convert powerpoint to htm and htm to powerpoint
anbillava — Sat, 12 Dec 2009 08:57:09 -0500
Hi,

Using powerpoint we can save the powerpoint file to web page. Doing this will create bundle of xml and htm files along with starting index page. Clicking on index page will start the presentation. Is there any apis by which powerpoint files can be saved as htm(which creates bundle of htm and xml files) also vice versa. I am trying to do this. But there is no luck yet. For me converting the htm files to powerpoint is very important.

Please let me know if anybody has some idea on this.

Anand
Community Discussion



Analyse the error of database connection factory in web report development
freezea — Fri, 04 Dec 2009 00:53:43 -0500
Problem

For the users of web report tool, when developing web report, they need to configure dataset at first. When data source is complicated, they often want do some special handling to dataset. With the dataset factory listener class of RAQ Report, they can realize this idea.
However, users may meet a few problems in the use of dataset factory listener class. Next, we will introduce the common problems to help users to develop web report correctly with RAQ Report.
Error information 

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Access 16 Bit DLLs using java?
niobie — Thu, 03 Dec 2009 09:43:19 -0500
Hi,
I have been given the task to upgrade an existing 16 Bit Desktop application.

The source code is in GFA Basic. I wanted to know if there is a possibility to access the functions inside these 16 Bit Dlls via jna/jni(I am not sure about the difference between the two).

Your help would be highly appreciated.

Thanks.
Tools and Methods



Error message "no report config file! " while deploying RAQ Report
freezea — Sat, 28 Nov 2009 20:27:47 -0500
While using RAQ Report to develop web report and deploy it to web server, we often confront the error message “no report config file” when we preview the report, and make it impossible to preview.  The error message in the console is:

javax.servlet.ServletException: No report config file! at

com.runqian.report4.view.ReportServlet.loadConfig(Unknown Source:75) at

com.runqian.report4.view.ReportServlet.reloadConfig(Unknown Source:823) at com.runqian.report4.tag.HtmlTag.doStartTag(Unknown Source:20) 

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My personal opinion
Wed, 25 Nov 2009 01:46:27 -0500
Thanks for the important article.Wish you bet of luck.JW Talkback



difficult compilation
pochis40 — Sun, 15 Nov 2009 11:41:03 -0500
I need an advice: I have a program made from a person that now it is not available. It is a Java applet; it is perfectly working and I have the sources: 4 Java files of, respectively, 326, 210, 119 and 35 lines (not a big program) and a very simple html file. I need to change some parameters inside Java files and compile all, but I don't know enough Java language. I have read a lot of tutorials and tried with Eclipse, but without success.
Community Discussion



It's Time to Reinvent Java Web Services
mhansen — Thu, 05 Nov 2009 11:51:56 -0500
Adding web services to existing Java applications should not involve programming.  There should simply be a switch that you can turn ON or OFF to determine which parts of a Java application get exposed as web services. 

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static connections and connection pooling - what happens when physical connection is lost?
johach — Tue, 03 Nov 2009 19:58:24 -0500
My EJB has a method which will be running on a transaction started by a previous EJB.
This method has multiple calls to a makeValid method that needs to commit separately from the main transaction:


public class MyEJB{

	private Connnection mainConnection = null;

	private static final Connection staticConnection = (new ConnectionHelper()).getConnection();
	public MyEJB(Connection conn){

		this.mainConnection = conn;

	}
	public void myMethod(List myList){

		//...

	        for (int j = 0; j < myList.size; j++) {

			boolean valid = MyEJB.makeValid(); 

Read more ...
Enterprise Java



thank you nice post...
enkeles — Tue, 03 Nov 2009 18:23:33 -0500
thank you, nice post...

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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