New For JAVA

I am a oracle programmer does't know any thing about JAVA.
Can any body guide me how I can start ? what
type of initial applications I may start to develope etc.

Certainly, primally being a Java coder, ill be happy to point you to the place i started.
http://java.sun.com/docs/books/tutorial/
Its better than any book you can buy. Trust me.. go to the source.

Similar Messages

Great News for Java Game Developers!

Finally, a complete game engine is being developed for Java! Mind2Machine is developing a genre-neutral game engine that goes way beyond a simple 3D Library.
The engine is called: OpenMind Alpha v0.7 and includes many useful game programming libraries. Say goodby to C++ and complicated engine builds/API's.
Mind2Machine is currently working on OpenMind v1.0 and they need experienced Java programmers to help develop new items. There are a lot of libraries on the drawing board, here are just a few:
-Java Physics engine
-All purposes particle system
-Collision detection
-And much more...
OpenMind is open source and is developed under the LGPL license.
I'm trying to get the word out, because I believe we could all benefit from this engine.
If you're interested in the engine and/or you would like to contribute to the development of the next version(s). Please visit their webpage:
http://www.mind2machine.com/gb/openmind/index.php
Check out their developers link, and spread the word!

I got openmind, and started to install it... and then 20 minutes later I realized I hadn't really gotten anywhere and I had to download other software just so that I could install the rest of it, and that software had its own set of bogus instructions... so I got pissed and closed it all :P

What IDE is most popular for Java??

Hi, there,
I'm new for Java, I knew some IDEs for java,
such as JBuilder,VisualAge,SunONE,Cafe, which is
most popular? pls recommend me,thanks!!!
Rgds

I have been privileged to use the following IDE's visualage, JDeveloper,JBuilder and Eclipse, which one is the best, honestly it really depends on what you want to do. For example, if you are thinking in terms fo front-end application Swing,Applet etc, i still JBuilder tops the list , though i have yet to fully use JDeveloper for this purpose. EClipse is cheap, yes, that is where it ends, at the moment we are using Eclipse in my office because it is free, and so comes its nightmares, take my advice avoid cheap.
Visual Age for Java, not the best when you are thinking of front end, but when you talk about server side stuff, wao go for this IDE, it comes with so many benefits it just cant be ignored. It comes with its own server(Websphrere) , which Eclipse does not have. JDeveloper perhaps with the little i have seen so far will compare favourably if not better, the reason being it takes care of two communities atb the same time,Oracle and java, both to which i can identify. Your ability to sit within JDeveloper and do so many stuff , including update your Oracle DB and your application server is simply decadent, it simply spoils you. Why IBM did not do the same with Visual age and DB2 beats me. If you want to pick dont go any further between these two emm maybe JBuilder if all you are doing is building applets

Looking for Java programmers for a new project

I am currently looking to find about 5 people to start a new company to develop some ebusiness related business ideas. Location does not matter, only creativity and a willingness to change the status quo. If you are interested email me at [email protected] I am just a guy with some really unique ideas looking for people that share my vision and that are looking to start a company from the ground up.

Hi,
Are you still looking for Java programmers? Can we participate in your work offline? I am in France now. Tell me what exactly you need? I am 5yers experienced in Java technlogy.
Reply back to [email protected]
Regards,
Murthy

New Features for Java GUI

Hello everyone!
Can anybody tell about new features in SAP GUI for Java. I think It's emasculate now. It doesn't contain New ABAP editor, Network graphic, normal Screen Painter... I really enjoy adding themes and other stuff, but when these functionality will be added?
Thanks.

Hi,
I use Java GUI from version 6.40, so i didn't know new ABAP editor for years. Once somebody shows me its features ...and I found that it is really good editor compared with previous Notepad-like frontend editor. But I have to say that customized version od Gvim used as external editor is in 90% better then new ABAP editor (the only problem is that double click on object doesn't work, but some workarounds are known for double-click on locally defined objects).
Graphical screen painter is generally good tool, but once I cannot find any feature (sorry, I forgot which one, it happens about 6 years ago). I ask a SAP guru sitting near me. He comes, switch graphical screen painter off and click to a box in non-graphical version of screen painter. Then he told me that some features are not accessible in graphical screen painter. It was last time I used graphical version of screen painter.
Themes? Works .... at least for me (Linux 32 bit and now Linux 64 bit too).
So I think that Java GUI is usable (at least on Linux/Mac, I am not sure how in works under Windows) but you cannot stick on all features (and maybe you can find better working variants of it). E. g. I have no problem with new ABAP editor, it would be much better for me, if I can open external editor clicking to "Change" button in SE38 directly instead of click plus selecting external editor from menu.
Regards,
Pavel

New user for java (Data type conversion)

Hi all, I'm the newer from JAVA, just start to learn it few weeks before, there have some problem about me.
I want to konw how to change the data type ??For example, if I have a string call year and store the char "1", how can I change that field to int type ?
Thanks very much

You should have a link to, or download, the API docs. You can see them on line at:
http://java.sun.com/j2se/1.3/docs/api/index.html
Look up the class Integer. It has a static method, parseInt() which takes a String argument and returns an int.. Since it is static, you can do the following:
int value = Integer.parseInt(your_string);
Then, to make it robust, you can put try/catch around it and catch NumberFormatException if you need to do error checking.

New tips for Java developers

Hello to all Java developers!
Im new to the forum and I wanna say all of you hi. Wanna give you a link to one very interesting article on java development (Video Conversion System Implementation)
http://techzone.enterra-inc.com/video/video-conversion-system-implementation/
I want to discuss it with you here.

In what way is that a tip for Java Developers? In what way is it related to Java Programming?

Up for something new in Java - tabs and executables.

Hey again,
Ive grown quite confident in my basics for JAVA and now want to try some new things.
I want to make a piece of java that i could actually open like somekind of program, preferably (like) a .exe file,
Are you aware of any way to acomplish this?
Next to that, I want to use tabs in the new application, but how does the tab structure work?
I am using Java-Editor and am interested in the JTabbedPane part, to be more exact.
Thanks in advance!
-Annihlator.

Annihlator wrote:
Hey again,
Ive grown quite confident in my basics for JAVA and now want to try some new things.
I want to make a piece of java that i could actually open like somekind of program, preferably (like) a .exe file,
Are you aware of any way to acomplish this?
Next to that, I want to use tabs in the new application, but how does the tab structure work?
I am using Java-Editor and am interested in the JTabbedPane part, to be more exact.
Thanks in advance!
-Annihlator.The preferred distribution format for java is the .jar (Java ARchive)file. If they are built correctly and the .jar file type is linked to the java runtime, they can be double-clicked and executed. Sun has some very nice tutorials on building and using them.
As for JTabbedPane, it's really quite simple. Just add the JPanels you want to show for each tab to the JTabbedPane (along with the tab text). Again, the tutorials (linked from the javadocs) explain the basics pretty well.

New in Kodo 3.3.3: Improved support for Java 5 enums and generics?

Hello,
Can anybody tell me if Kodo 3.3.3 can be deployed on WebLogic 8.1 sp4, jdk
1.4.1? The reason I ask this is because one of the features mentioned for
v3.3.3 is the support for Java 5 generics, which is available on WebLogic
9 -- but not in WebLogic 8.1 sp4. The documentation for Kodo 3.3.3 seems
to indicate that it can be deployed on WebLogic 8.1 -- can anyone tell me
if this is accurate?
Thanks for your help!

Correction:
I think that my question may have been misunderstood. What I want to know
is if Kodo 3.3.3 can be deployed on WebLogic 8.1sp4 which is running JDK
1.4 or do I have to deploy on a newer version of WebLogic that is running
Java 5?
Thanks!
Rita wrote:
I think that my question may have been misunderstood. What I want to know
is if Kodo 3.3.3 can be deployed on WebLogic 8.1sp4 which is running JDK
1.4 or do I have to deploy on a newer version of WebLogic that is running
Java 4?
Thanks!
Stephen Kim wrote:
Rita,
While Kodo 3.3.x can work with JDK 5, it cannot make WL work with JDK 5.
However, Kodo 3.4 RC 3 / 4.0 EA 2 both can work with WL 9 (which works
with JDK 5).
Rita wrote:
Hello,
Can anybody tell me if Kodo 3.3.3 can be deployed on WebLogic 8.1 sp4,
jdk
1.4.1? The reason I ask this is because one of the features mentionedfor
v3.3.3 is the support for Java 5 generics, which is available on WebLogic
9 -- but not in WebLogic 8.1 sp4. The documentation for Kodo 3.3.3 seems
to indicate that it can be deployed on WebLogic 8.1 -- can anyone tell me
if this is accurate?
Thanks for your help!
Steve Kim
[email protected]
SolarMetric Inc.
http://www.solarmetric.com

Is new Windows Mobile VM for Java ME in new SDK 3.0 for common users?

Hi,
There are bunch of buggy VMs for WM Platform such as Esmertec JBED, Esmertec JBLEND, IBM J9 etc. They have lot of bugs and they don't support neccessary JSRs. Now I have read about Windows Mobile integration in new SDK 3.0 EA for Java ME - I undestand that there is a new VM for WM from Sun, is that right? But when I installed CAB version, it seams it is just for on-device debugging with connected Wireless Toolkit on PC. I can't launch midlets located in my WM device on it. Is there also VM for common users? So they could install virtual machine and then install their midlets? I think many developers and users would apreciate it. Or is it at least in plan to release such VM?

Jackson_Bill wrote:
What IDE are you using and what platform?Read first.
Moh Bob wrote:
I'm using J2ME platform SDK 3.0
db

Which IDE is better for new to Java?

netbeans?eclipse?JB?

well, I'm new to java too , but no to using IDEs,
and my impressions are the following:
Java creator is a great, great tool, but it lacks the
"easiness" of eclipse, it's more focused on the 'web
side' of the Java technology, not too much for the
standalone app creation[IMHO].
Eclipse is great too, but it needs more work in the
GUI 'design time' subject.
Both offer great features, and both have tons and
tons of tutorials for beginners and i think the best
tool is that which makes you feel more comfortable
with it , in my [really really short] experience, i
have used both and honestly, i feel more comfortable
working with eclipse, but i keep using both.
Walter_Rincon
[real name]If you are new to java you should be using a notepad ( or maybe a simple text-editor ) not an IDE!

Is there any materials for the New to java?

Dear all:
I am new to Java Here, but seems I can't find some useful materials for me to study, can you guys kindly provide here?
Thank you so much~~

JasonChan_GLTc wrote:
I can't find some useful materials for me to studyI find it difficult to believe that Google did not yield a single decent resource.
sigh

New to java: have to develop for palm, symbian and pocket pc

Hello,
I am fairly new to Java. After a long time of searching for a technology which allows it to develop an application for Palm OS, Symbian OS and Pocket PC I am curious if one can do this with Java. I searched the Palm and Symbian homepages and found that those OSes can handle MIDlets. I could not found if they also can handle full Java-applications. For the Pocket PC I could not found a solution to run Java applications or MIDlets.
My questions:
- is it possible to run Java applications on Palm, Symbian an Pocket PC?
- if yes, which tools are the best to use? (SUN One?)
- is it possible to write "real" applications (for instance a spreadsheet) as MIDlet or can one use "real"-Java to develop applications for Palm/Symbian/Pocket PC?
Sorry if this questions sound a little stupid an thanks for every help/suggestion!
Kind regards,
Martijn

Normaly such devices only know MIDlets. This is becaus they do not have the power of a PC. In addition to that they are to different in hardware so an other API is to use.
I think it is notpossible to write a VM to do the same as a PC now.
Hope this will help you.

XModem via TCP for Java

I am sure that many of you experienced developers have read requests in the past concerning implmentation of Ward Christenen's XModem protocol over a TCP socket. If not, well... you are about to...
This is a major hack... but it is starting to come together... thanks to Fred Potter for his source code to start this project...
Objective:
Basically, I want to create a console application which accepts an incoming connection and starts the receive mode for a XModem file transfer. I am using CGTerm (for Commodore retrocomputing) but can test with HyperTerminal as well...
The user who connects to the server selects SEND and the FILE to send for a XModem file transfer... and the transfer begins...
The incoming blocks of 128 bytes are written to a file
After the transfer is over the server disconnects the client terminal.
Here is what I have so far:
import java.net.*;
import java.lang.*;
import java.io.*;
// X-Modem Server implementation via TCP/IP socket
public class XServer {
public static FileWriter fw;
public static void main(String[] args) throws IOException {
// define the file
try {
fw = new FileWriter("filename.txt");
} catch (Exception e) {
System.out.println(e);
System.exit(0);
int port = Integer.parseInt(args[0]);
ServerSocket server = new ServerSocket(port);
System.out.println("X-Server v1.0 - waiting for connection");
Socket client = server.accept();
// Handle a connection and exit.
try {
InputStream inputStream = client.getInputStream();
OutputStream outputStream = client.getOutputStream();
new PrintStream(outputStream).println("Go to send file mode!"); // sent to client
System.out.println("Ready to receive file via X-Modem...");
* BEGIN TRANSFER HERE!
// set the debug flag
XModem.debug = true;
* Here we are instantiating a new InputStream that represents the remote
* file that we are receiving. In this single line we are attempting to
* start the flow.
* Behind The Scenes: We're sending a NAK across the serial line repeatedly
* until we finaly start seeing the data flow. If we don't see the data
* flow, then we throw an exception.
System.out.println("Sending NAK to start receive mode...");
InputStream incomingFile;
try {
incomingFile = new XModemRXStream(inputStream, outputStream);
} catch (IOException e) {
System.out.println("ERROR! Unable to start file transfer!");
e.printStackTrace();
return;
System.out.println("Starting file transfer...");
* Here we are reading from the incoming file, byte by byte, and printing out.
* Behind The Scenes: Internally, the read() method is handling the task of
* asking for the next data block from the remote computer, processing it (i.e.
* parsing, running checksums), and then putting it in an internal buffer. Not
* all calls to read() will request a new data block as each block contains at
* least 128 bytes of data. Sometimes you will only hit the buffer.
try {
for (;;) {
int c = incomingFile.read();
if (c==-1)
break; // End of File
// print character / byte
System.out.print(c+",");
// write to file
try {
//System.out.print(".");
fw.write(c);
} catch (Exception e) {
System.out.println(e);
System.exit(0);
} catch (IOException e) {
System.out.println("error while reading the incoming file.");
e.printStackTrace();
return;
// done
System.out.println("File sent.");
new PrintStream(outputStream).println("");
new PrintStream(outputStream).println("transfer successful!");
} finally {
//client.close();
// save the file
try {
fw.close();
System.out.println("file saved.");
} catch (Exception e) {
System.out.println(e);
System.exit(0);
* XModem keeps track of settings that the Receive and Transmit Stream classes will
* reference.
* <p>Copyright: Copyright (c) 2004</p>
* @author Fred Potter
* @version 0.1
class XModem {
public static boolean debug = false;
* XModemRXStream is an easy to use class for receiving files via the XModem protocol.
* @author Fred Potter
* @version 0.1
class XModemRXStream
extends InputStream {
// CONSTANTS
private static final int SOH = 0x01;
private static final int EOT = 0x04;
private static final int ACK = 0x06;
private static final int NAK = 0x15;
private static final int CAN = 0x18;
private static final int CR = 0x0d;
private static final int LF = 0x0a;
private static final int EOF = 0x1a;
// block size - DON'T CHANGE - I toyed with the idea of adding 1K support but the code is NOT there yet.
private static final int bs = 128;
// PRIVATE STUFF
private int ebn; // expected incoming block #
private byte[] data; // our data buffer
private int dataPos; // our position with the data buffer
private InputStream in;
private OutputStream out;
* Creates a new InputStream allowing you to read the incoming file. All of the XModem
* protocol functions are handled transparently.
* As soon as this class is instantiated, it will attempt to iniatate the transfer
* with the remote computer - if unsuccessful, an IOException will be thrown. If it
* is successful, reading may commense.
* NOTE: It is important not to wait too long in between calls to read() - the remote
* computer will resend a data block if too much time has passed or even just give up
* on the transfer altogether.
* @param in InputStream from Serial Line
* @param out OutputStream from Serial Line
public XModemRXStream(InputStream in, OutputStream out) throws
IOException {
this.in = in;
this.out = out;
// Initiate the receive sequence - basically, we send a NAK until the data
// starts flowing.
init:for (int t = 0; t < 10; t++) {
if (XModem.debug) {
System.out.println("Waiting for response [ try #" + t + " ]");
long mark = System.currentTimeMillis();
out.write(NAK);
// Frequently check to see if the data is flowing, give up after a couple seconds.
for (; ; ) {
if (in.available() > 0) {
break init;
try {
Thread.sleep(10);
catch (Exception e) {}
if (System.currentTimeMillis() - mark > 2000) {
break;
// We have either successfully negotiated the transfer, OR, it was
// a failure and timed out. Check in.available() to see if we have incoming
// bytes and that will be our sign.
if (in.available() == 0) {
throw new IOException();
// Initialize some stuff
ebn = 1; // the first block we see should be #1
data = new byte[bs];
dataPos = bs;
* Reads the next block of data from the remote computer. Most of the real XModem protocol
* is encapsulated within this method.
* @throws IOException
private synchronized void getNextBlock() throws IOException {
if (XModem.debug) {
//System.out.println("Getting block #" + ebn);
// Read block into buffer. There is a 1 sec timeout for each character,
// otherwise we NAK and start over.
byte[] buffer;
recv:for (; ; ) {
buffer = new byte[bs + 4];
for (int t = 0; t < 10; t++) {
System.out.println("\nReceiving block [ #" + ebn + " ]");
// Read in block
buffer = new byte[buffer.length];
for (int i = 0; i < buffer.length; i++) {
int b = readTimed(1);
// if EOT - don't worry about the rest of the block.
if ( (i == 0) && (b == EOT)) {
buffer[0] = (byte) (b & 0xff);
break;
// if CAN - the other side has cancelled the transfer
if (b == CAN) {
throw new IOException("cancelled");
if (b < 0) {
if (XModem.debug) {
System.out.println("Time out... NAK'ing");
out.write(NAK);
continue recv;
else {
buffer[i] = (byte) (b & 0xFF);
break;
int type = buffer[0] & 0xff; // either SOH or EOT
if (type == EOT) {
if (XModem.debug) {
System.out.println("EOT!");
out.write(ACK);
break;
int bn = buffer[1] & 0xff; // block number
int bnc = buffer[2] & 0xff; // one's complement to block #
if (
(bn != ebn) && (bn != (ebn - 1)) ||
(bn + bnc != 255)) {
if (XModem.debug) {
System.out.println("NAK'ing type = " + type + " bn = " + bn +
" ebn = " +
ebn + " bnc = " + bnc);
out.write(NAK);
continue recv;
byte chksum = buffer[ (buffer.length - 1)];
byte echksum = 0;
for (int i = 3; i < (buffer.length - 1); i++) {
echksum = (byte) ( ( (echksum & 0xff) + (buffer[i] & 0xff)) & 0xff);
if (chksum != echksum) {
out.write(NAK);
continue recv;
out.write(ACK);
if (ebn == 255) {
ebn = 0;
else {
ebn++;
break;
// We got our block, now save it in our data buffer.
data = new byte[bs];
for (int i = 3; i < (buffer.length - 1); i++) {
data[(i - 3)] = buffer;
dataPos = 0;
public synchronized int read() throws IOException {
// If at the end of our buffer, refill it.
if (dataPos == bs) {
try {
getNextBlock();
catch (IOException e) {
throw new IOException();
// If we're still at end of buffer, say so.
if ( dataPos == bs) {
return -1;
int d = data[dataPos];
if (d == EOF)
return -1;
dataPos++;
return d;
* A wrapper around the native read() call that provides the ability
* to timeout if no data is available within the specified timeout value.
* @param timeout timeout value in seconds
* @throws IOException
* @return int an integer representing the byte value read.
private int readTimed(int timeout) throws IOException {
long start = System.currentTimeMillis();
for (; ; ) {
if (in.available() > 0) {
return (in.read());
try {
Thread.sleep(10);
catch (InterruptedException ex) {
//if (System.currentTimeMillis() - start > timeout * 1000) {
if (System.currentTimeMillis() - start > timeout * 5000) {
return -1;
Here was the output...
Original file:
(Commodore CBM SEQ file exported to PC using DirMaster)
��
� �
� ��
� ��
� ��
��
� ��
� � ��
��
� � ��OWERED BY �OLOR 64 �� V8
�UNNING �ETWORK64 V1.26A
�
�UPPORTING 38400 �AUD �ATES
��/��/��
�
�ESTING �CHO-�ET V1 BETA
�
�EATURING �ESSAGES, �ILES,
�ET�AIL, AND �NLINE �AMES!
�YS�P: � � � � � � � � �
�
�RESS ANY KEY TO LOGIN\C�
The result when the file was uploaded and received by my XServer:
? ? ??OWERED BY ?OLOR 64 ??? V8
?UNNING ?ETWORK64 V1.26A
?UPPORTING 38400 ?AUD ?ATES
?ESTING ?CHO-?ET V1 BETA
?EATURING ?ESSAGES, ?ILES,
?ET?AIL, AND ?NLINE ?AMES!
?YS?P: ? ? ? ? ? ? ? ? ?
?RESS ANY KEY TO LOGIN\C?
The result is different!
Can someone help me along here... I have been trying to figure out how to do this for approx. a year or so... it has been a very slow process.
I could use a guru to help me out so I can write the upload and download routines for my Commodore BBS PETSCII Emulation Server.
Visit http://www.retrogradebbs.com for details.
Thanks.
Please help out a dedicated developer who is in over his head...
-Dave

Ok. Fair enough. What about general information about Xmodem. This is a hard project because of how obscure the legacy technology is that I am having to implement using Java and MySQL.
I have two major issues which I have to figure out how to troubleshoot and debug, if possible.
1. The 23+ blocks exception when a file is being received
2. The exception which is thrown immediately if I try to receive a binary file instead of an ASCII file.
I read that telnet is a 7-bit technology and that is why Xmodem, which is an 8-bit technology is not that popular as a viable protocol via telnet, whereas Kermit is, since it was developed for 7-bit systems, i.e. mainframes and minicomputers.
Is this correct?
If that is the case, why does www.serio.com have a viable X-Y-ZModem library available (for several hundred $$$ of course) which can be used with both RS-232 serial ports and TCP socket ports? Obviously, it can be done. They are the ONLY company with this library for sale for Java to do this. I cannot justify that $$$ amount for a mere hobby (writing the BBS emulation server for supporting Commodore PETSCII (CG) callers via CGTerm or a native C-64 terminal program using Jim Brain's TCPSER middleware, which emulates a Hayes modem via telnet for telBBSing/retrocomputing.
I really want to learn how to implement a file transfer protocol, since back in the 80s, I used Xmodem, Punter, Y/Z Modem, etc., a lot to upload and download files via modem at baud rates of 2400, 14.4, 19.2, and 38.4, respectively.
It's fun to learn how the old skool gurus of telecommunications technology did it. It is one thing to run a BBS which supports these technologies and features, and it is an entirely other thing to learn how to design and develop them yourself for implementation into a project such as I taken on.
It CAN be done. It WILL be done. However, I have just started my exhaustive research on how it needs to be done. I have read up as much as I could on XModem by Ward C., the father of the protocol.
But, I have no information to help me figure out why the communications are acting as they do so far.
Can someone please download the xserver.zip file on my website at:
www.retrogradebbs.com/projects/xserver.zip
Compile it. Run it. Connect using HyperTerminal, Netrunner, or another telnet terminal emulation program which supports Xmodem file transfers using WinSock.
See what happens. With finals due in the next two days, this project will have to be put on hold until after I submit my two final projects.
If anyone knows what needs to be done to support both ASCII and BINARY file transfers via Xmodem via a socket instead of a modem with RTS/CTS hardware flow control, please respond.
I know for a fact that this can be done.
- Dave

How to create a report with data using the Crystal Reports for Java SDK

Hi,
How do I create a report with data that can be displayed via the Crystal Report for Java SDK and the Viewers API?
I am writing my own report designer, and would like to use the Crystal Runtime Engine to display my report in DHTML, PDF, and Excel formats. I can create my own report through the following code snippet:
ReportClientDocument boReportClientDocument = new ReportClientDocument();
boReportClientDocument.newDocument();
However, I cannot find a way to add data elements to the report without specifying an RPT file. Is this possible? I seems like it is since the Eclipse Plug In allows you to specify your database parameters when creating an RPT file.
is there a way to do this through these packages?
com.crystaldecisions.sdk.occa.report.data
com.crystaldecisions.sdk.occa.report.definition
Am I forced to create a RPT file for the different table and column structures I have?
Thank you in advance for any insights.
Ted Jenney

Hi Rameez,
After working through the example code some more, and doing some more research, I remain unable to populate a report with my own data and view the report in a browser. I realize this is a long post, but there are multiple errors I am receiving, and these are the seemingly essential ones that I am hitting.
Modeling the Sample code from Create_Report_From_Scratch.zip to add a database table, using the following code:
<%@ page import="com.crystaldecisions.sdk.occa.report.application.*"%>
<%@ page import="com.crystaldecisions.sdk.occa.report.data.*"%>
<%@ page import="com.crystaldecisions.sdk.occa.report.document.*"%>
<%@ page import="com.crystaldecisions.sdk.occa.report.definition.*"%>
<%@ page import="com.crystaldecisions.sdk.occa.report.lib.*" %>
<%@ page import = "com.crystaldecisions.report.web.viewer.*"%>
<%
try {
            ReportClientDocument rcd = new ReportClientDocument();
            rcd.newDocument();
// Setup the DB connection
            String database_dll = "Sqlsrv32.dll";
            String db = "qa_start_2012";
            String dsn = "SQL Server";
            String userName = "sa";
            String pwd = "sa";
            // Create the DB connection
            ConnectionInfo oConnectionInfo = new ConnectionInfo();
            PropertyBag oPropertyBag1 = oConnectionInfo.getAttributes();
            // Set new table logon properties
            PropertyBag oPropertyBag2 = new PropertyBag();
            oPropertyBag2.put("DSN", dsn);
            oPropertyBag2.put("Data Source", db);
            // Set the connection info objects members
            // 1. Pass the Logon Properties to the main PropertyBag
            // 2. Set the Server Description to the new **System DSN**
            oPropertyBag1.put(PropertyBagHelper.CONNINFO_CRQE_LOGONPROPERTIES, oPropertyBag2);
            oPropertyBag1.put(PropertyBagHelper.CONNINFO_CRQE_SERVERDESCRIPTION, dsn);
            oPropertyBag1.put("Database DLL", database_dll);
            oConnectionInfo.setAttributes(oPropertyBag1);
            oConnectionInfo.setUserName(userName);
            oConnectionInfo.setPassword(pwd);
            // The Kind of connectionInfos is CRQE (Crystal Reports Query Engine).
            oConnectionInfo.setKind(ConnectionInfoKind.CRQE);
// Add a Database table
          String tableName = "Building";
            Table oTable = new Table();
            oTable.setName(tableName);
            oTable.setConnectionInfo(oConnectionInfo);
            rcd.getDatabaseController().addTable(oTable, null);
    catch(ReportSDKException RsdkEx) {
            out.println(RsdkEx);
    catch (Exception ex) {
          out.println(ex);
%>
Throws the exception
com.crystaldecisions.sdk.occa.report.lib.ReportSDKException: java.lang.NullPointerException---- Error code:-2147467259 Error code name:failed
There was other sample code on SDN which suggested the following - adding the table after calling table.setDataFields() as in:
          String tableName = "Building";
            String fieldname = "Building_Name";
            Table oTable = new Table();
            oTable.setName(tableName);
            oTable.setAlias(tableName);
            oTable.setQualifiedName(tableName);
            oTable.setDescription(tableName) ;
            Fields fields = new Fields();
            DBField field = new DBField();
            field.setDescription(fieldname);
            field.setHeadingText(fieldname);
            field.setName(fieldname);
            field.setType(FieldValueType.stringField);
            field.setLength(40);
            fields.add(field);
            oTable.setDataFields(fields);
            oTable.setConnectionInfo(oConnectionInfo);
            rcd.getDatabaseController().addTable(oTable, null);
This code succeeds, but it is not clear how to add that database field to a section. If I attempt to call the following:
FieldObject oFieldObject = new FieldObject();
            oFieldObject.setDataSourceName(field.getFormulaForm());
            oFieldObject.setFieldValueType(field.getType());
            // Now add it to the section
            oFieldObject.setLeft(3120);
            oFieldObject.setTop(120);
            oFieldObject.setWidth(1911);
            oFieldObject.setHeight(226);
            rcd.getReportDefController().getReportObjectController().add(oFieldObject, rcd.getReportDefController().getReportDefinition().getDetailArea().getSections().getSection(0), -1);
Then I get an error (which is not unexpected)
com.crystaldecisions.sdk.occa.report.lib.ReportDefControllerException: The field was not found.---- Error code:-2147213283 Error code name:invalidFieldObject
How do I add one of the table.SetDataFields() to my report to be displayed?
Are there any other pointers or suggestions you may have?
Thank you

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