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- 3
- what's wrong? my first simplest java program failed..I created a test.java file in D:\j2sdk1.4.2_04\bin>
and the content:
class
{
public static void main(String[] args)
{
System.out.println("Hello World!");
}
}
then I compile it:
D:\j2sdk1.4.2_04\bin>javac test.java
test.java:1: <identifier> expected
class
^
test.java:8: '{' expected
^
2 errors
D:\j2sdk1.4.2_04\bin>
my book tell me it would work well, what's wrong?
--
Your fault as a Government is My failure as a Citizen.
- 3
- JApplet Structure ProblemHi,
I can't run this Japplet in a web browser. But the eclipse applet
viewer works...
I guess it's beacause we havn't implemented the methods init, start,
stop and resize.
Can you post some standard example methods?
Should we move the code from the main method in the init method?
Any help will be appreciated...
Thanks alot
Dennis
package mn;
import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.JTextField;
public class NewJApplet extends javax.swing.JApplet {
private JPanel jPanel2;
private JPanel jPanel1;
private JPanel jPanel3;
private JPanel jPanel7;
private JLabel jLabel1;
private JLabel jLabel4;
private JPanel jPanel5;
private JLabel jLabel5;
private JTextField jTextField2;
private JSlider jSlider2;
private JPanel jPanel10;
private JLabel jLabel3;
private JPanel jPanel9;
private JCheckBox jCheckBox1;
private JPanel jPanel6;
private JPanel jPanel4;
private JSlider jSlider1;
private JLabel jLabel2;
private JButton OK;
private JTextField jTextField1;
private JButton jb1;
private JButton jb2;
{
//Set Look & Feel
try
{
javax.swing.UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
} catch(Exception e) {
e.printStackTrace();
}
}
/**
* Auto-generated main method to display this
* JApplet inside a new JFrame.
*/
public static void main(String[] args) {
JFrame frame = new JFrame();
NewJApplet inst = new NewJApplet();
// inst.setSize(500,500);
frame.getContentPane().add(inst);
//((JComponent)frame.getContentPane()).setPreferredSize(new
java.awt.Dimension(
// 500,
// 500));
// frame.setSize(500,500);
frame.pack();
// ((JComponent)frame.getContentPane()).setPreferredSize(new
java.awt.Dimension(
// 500,
// 500));
// frame.setSize(500,500);
// inst.setSize(500,500);
frame.setVisible(true);
}
public NewJApplet() {
super();
initGUI();
}
private void initGUI() {
try {
BorderLayout thisLayout = new BorderLayout();
getContentPane().setLayout(thisLayout);
//this.setSize(576, 300);
{
jPanel2 = new JPanel();
getContentPane().add(jPanel2, BorderLayout.NORTH);
//jPanel2.setPreferredSize(new java.awt.Dimension(576, 78));
}
{
jPanel1 = new JPanel();
getContentPane().add(jPanel1, BorderLayout.SOUTH);
BorderLayout jPanel1Layout = new BorderLayout();
jPanel1.setLayout(jPanel1Layout);
//jPanel1.setPreferredSize(new java.awt.Dimension(576, 103));
{
jPanel3 = new JPanel();
BorderLayout jPanel3Layout = new BorderLayout();
jPanel3.setLayout(jPanel3Layout);
//jPanel3.setPreferredSize(new java.awt.Dimension(361, 113));
{
jPanel7 = new JPanel();
jPanel7.setPreferredSize(new java.awt.Dimension(600, 35));
{
jLabel2 = new JLabel();
jPanel7.add(jLabel2);
jLabel2.setText("Signal");
jLabel2.setPreferredSize(new java.awt.Dimension(
58,
17));
}
{
jSlider1 = new JSlider();
jPanel7.add(jSlider1);
}
{
jTextField1 = new JTextField();
jPanel7.add(jTextField1);
jTextField1.setText("1000");
}
{
jLabel1 = new JLabel();
jPanel7.add(jLabel1);
jLabel1.setText("Hz");
}
{
jb1 = new JButton();
jPanel7.add(jb1);
jb1.setText("OK");
}
jPanel3.add(jPanel7, BorderLayout.NORTH);
}
{
jPanel10 = new JPanel();
//jPanel10.setPreferredSize(new java.awt.Dimension(
// 339,
// 35));
{
jLabel4 = new JLabel();
jPanel10.add(jLabel4);
jLabel4.setText("Abtastung");
jLabel4.setPreferredSize(new java.awt.Dimension(
58,
17));
}
{
jSlider2 = new JSlider();
jPanel10.add(jSlider2);
}
{
jTextField2 = new JTextField();
jPanel10.add(jTextField2);
jTextField2.setText("1000");
}
{
jLabel5 = new JLabel();
jPanel10.add(jLabel5);
jLabel5.setText("Hz");
}
{
jb1 = new JButton();
jPanel10.add(jb1);
jb1.setText("OK");
}
jPanel3.add(jPanel10, BorderLayout.SOUTH);
}
jPanel1.add(jPanel3, BorderLayout.WEST);
}
{
jPanel4 = new JPanel();
BorderLayout jPanel4Layout = new BorderLayout();
jPanel4.setLayout(jPanel4Layout);
//jPanel4.setPreferredSize(new java.awt.Dimension(186, 68));
{
jPanel6 = new JPanel();
jPanel4.add(jPanel6, BorderLayout.NORTH);
{
jCheckBox1 = new JCheckBox();
jPanel6.add(jCheckBox1);
jCheckBox1.setText("Abtastungspunkte");
}
}
{
jPanel9 = new JPanel();
jPanel4.add(jPanel9, BorderLayout.CENTER);
//jPanel9
// .setPreferredSize(new java.awt.Dimension(202, 53));
{
jLabel3 = new JLabel();
jPanel9.add(jLabel3);
jLabel3.setText("Abtasttheorem ist erfé»®lt");
}
{
OK = new JButton();
jPanel9.add(OK);
OK.setText("Reset");
}
}
{
jPanel5 = new JPanel();
jPanel4.add(jPanel5, BorderLayout.WEST);
}
jPanel1.add(jPanel4, BorderLayout.EAST);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
- 4
- Eclipse - problem with external tool path name.I am running Eclipse 3.2 with on Windows with WebSphere WSAdmin set up
as an external tool. WSAdmin is basically a bat file that executes a
Java program. It takes a number of parameters one of which can be a
file containing properties.
External tool: C:\IBM\WAS51\DeploymentManager\bin\wsadmin.bat
Working directory ${workspace_loc:/WSAdmin}
Arguments:
-lang jacl
-host localhost -port 8879
-f ${resource_loc} ${resource_loc:/WSAdmin/WAS5.1/propertyFiles/Aquila/
aquila.properties}
The property file name "${resource_loc:/WSAdmin/WAS5.1/propertyFiles/
Aquila/aquila.properties}" gets converted to
"C:homepatrickeclipseWSAdminCVSWSAdminWAS5.1propertyFilesAquilaquila.properties
"
Obviously the back slashes are being escaped. Is there any way I can
prevent this?
I have already tried "${resource_loc:\\WSAdmin\\WAS5.1\\propertyFiles\
\Aquila\\aquila.properties}" without success.
ERROR: file
C:homepatrickeclipseWSAdminCVSWSAdminWAS5.1propertyFilesAquilaquila.properties
does not exist.
- 5
- Shootout (startup)
>On Wed, 30 Apr 2008 08:00:38 -0700 (PDT), Isaac Gouy
<email***@***.com> wrote:
>Why don't you go through all...
startup benchmark...
http://shootout.alioth.debian.org/gp4/benchmark.php?test=hello&lang=all
Damn! C & C++ are killing java in this benchmark. Though I discovered
a trick that improves the speed somewhat and saves some face...
With n = 200 (i.e 200 startups in continuous order).
java hello
time: 23.433s
However, just adding the flag -XX:+AggressiveHeap
java -XX:+AggressiveHeap hello
time: 9.914s
that's a huge improvement.
- 5
- SocketServer accept() fails to work (Linux)Hello,
I have the following problem with my server appllication:
This is typical server implemented in Java, using ServerSocket object,
waiting for client to connenct on ServerSocket.accept()
method. When the client connects (socket is received from accept() method)
it is handled by the server in separate thread.
The server writes the received data to the file and then closes the socket.
The problem:
the server handles about 20 connections daily, receiving about 100kB - 1MB
of data in each connection.
However after a few days the server fails to work,
the server waits on ServerSocket.accept() (as usually), however the clients
fail to connect to the server, but the server does not see
that any client tried to connect to it, it just waits on
ServerSocket.accept().
I'm using jre1.4.2_04 on Linux - Red Hat 9
Is there some bug in java-Linux-socket implementation or in my code ?
Thanks in advance.
This is the result of system netstat (after a few clients failed to connect
to the server):
tcp 78 0 localhost:32323 localhost:2560 CLOSE_WAIT
tcp 78 0 localhost:32323 localhost:2568 CLOSE_WAIT
tcp 78 0 localhost:32323 localhost:2576 CLOSE_WAIT
tcp 78 0 localhost:32323 localhost:2584 CLOSE_WAIT
tcp 78 0 localhost:32323 localhost:2340 CLOSE_WAIT
tcp 78 0 localhost:32323 localhost:2592 CLOSE_WAIT
tcp 78 0 localhost:32323 localhost:2348 CLOSE_WAIT
tcp 78 0 localhost:32323 localhost:2344 CLOSE_WAIT
tcp 78 0 localhost:32323 localhost:2356 CLOSE_WAIT
tcp 78 0 localhost:32323 localhost:2352 CLOSE_WAIT
tcp 78 0 localhost:32323 localhost:2608 CLOSE_WAIT
A snippet of the server source:
private class Server
{
private ServerSocket _serverSckt = null;
private boolean _break = false;
ServerRunnable()
{
_serverSckt= new ServerSocket(32323);
_serverSckt.setSoTimeout(2000);
}
public void exeServer()
{
try {
Socket clientSckt = null;
while (!_break)
{
try {
clientSckt = _serverSckt.accept();
} catch (SocketTimeoutException ex) {
// ok, timeout occured, while loops again
} catch (InterruptedIOException ex) {
final String sMsg = "_serverSckt Interrupred!!!
managed to transfer " + ex.bytesTransferred + " [bytes]";
_LOGGER.error(sMsg, ex);
}
if (clientSckt != null) {
getClientHandler().handleClient(clientSckt); //
handles client in separate thread
// note: clientSckt is closed by client handler
clientSckt = null;
}
}
} catch (IOException e) {
_LOGGER.error(e);
} catch (Throwable thr) {
_LOGGER.fatal(thr);
} finally {
_serverRunning = false;
try {
_serverSckt.close();
} catch (IOException e) {
Assert.catchReport(e);
}
}
}
}
- 5
- help with java assignmentWas just hoping someone could shed a bit of light on how to approach
this assignment. It would seem we have to determine the value of a in
order to determine how many times the method m() is called, but there
doesn't seem to be enough information to determine a's value. Any tips
would be greatly appreciated...
Many Thanks
For each of the following snippets of code, give the number of times
method m() is called, with a brief explanation. Assume that a and b are
nonnegative integers.
Snippet A
for (int i = a; i < a*a; ++i) {
m();
}
int i = 0; int j = a;
while (i <= j) {
++i;
m();
--j;
}
Snippet B
For this one, first we define a method m1:
public static void m1(int a) {
for (int i = 0; i <= a*a; ++i) {
m();
}
}
Now the snippet:
m1(a*a);
Snippet C
for (int i = a; i != a + b; i += 2) {
for (int j = a/2; j > 0; --j) {
for (int k = 1; k < a; ++k) {
m();
}
}
}
Snippet D
for (int i = 0; i < a; ++i) {
for (int j = 148; j < i; ++j) {
m();
}
}
- 6
- java assembler pjb[[[ Google probably will join this post to the 2003-01-03 thread of
the same name, your newsreader may be less helpful. ]]]
Kindly offline I was asked to confirm ...
Yes, instructions appear at:
http://groups.google.com/groups?threadm=2695edf1.0301031438.6fb5cd8%40posting.google.com
Yes I can fetch 48,910 bytes from:
http://members.aol.com/plforth/pjb.zip
Yes that .zip contains the compressed folder pjb/.
pjb/README.txt tells us nothing new except that I am
mailto:email***@***.com and we can click thru to pjb/cshlog.txt. In
turn, pjb/cshlog.txt suggests ..
Three steps:
--- 1) a procedure to produce the disassembly
HelloWorldAppJavaAssembler.java:
cd pjb
javac HelloWorldApp.java pjb/JavaAssembler.java
cp -ip HelloWorldApp.class HelloWorldApp.bin
java pjb.JavaAssembler HelloWorldApp
--- 2) A procedure to reassemble the disassembly:
javac HelloWorldAppJavaAssembler.java
rm HelloWorldApp.class
java HelloWorldAppJavaAssembler
--- 3) A comparison to show we have reassembled precisely the same
.class file:
diff HelloWorldApp.bin HelloWorldApp.class
Pat LaVarre
P.S. I ran this example in Mac OS X, with ships with javac installed,
even if you do not install the Developer's Disk. Linux with Java
should work identically. Windows with Java syntax for these is as
shown except `copy /-y` and `del` and `fc /b` for what here appears as
`cp -ip` and `rm` and `diff`.
- 7
- Automatically install java plug-inHello,
How can I automatically install (Internet explorer install dialogbox) the
java plugin from my HTML page.
Need sample code, please.
Thanks :)
- 9
- javap: fully qualified names for "new" statementsHello,
I'm using javap for my project.
Basically, what I'm interested in are the "new", "newarray" and
"anewarray" statements.
However, javap only outputs things like:
new #10; //class StringBuffer
but does not give me the fully qualified name.
Is there any way I could get to know this information?
Cheers,
Sebastien Marion
- 9
- From JAVA to EXE without the JRE
"Emil" <email***@***.com> wrote in message
news:email***@***.com...
> I would like to find a software or a way to have all my classes in my
> application as well as the .dll that I have (from C++) installed into
> one executable.
>
> Any suggestions will be appreciated.
>
> Or, can I have the JRE encapsulated somehow, and later unzip in the
> same directory so that the program would run ?
>
> Emil
>
I think a lot of IDE's have the jre with the install package. Try doing a
search of various installers. I think a popular one is InstallAnywhere
(www.zerog.com).
- 9
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- 14
- HELP got 'the code of method is exceeding 65535 limit in jaxbi have 50 elements like this:
<xsd:element name="Refer" substitutionGroup="ResultBaseSub" >
<xsd:complexType >
<xsd:complexContent>
<xsd:extension base="ResultBase">
<xsd:attribute name="Text" type="DbRef" />
</xsd:extension>
</xsd:complexContent>
</xsd:complexType>
</xsd:element>
i can divide them to smaller substituion groups, but will it help?
- 14
- RMI between Java 1.4 and Java 1.5 problemWhen attempting to RMI between a 1.4 client and a 1.5 server ( with a
1.5 interface, remote object, stubs and skeletons using the -vcompat
rmic flag ), I get the following error:
java.lang.ClassNotFoundException:
java.rmi.server.RemoteObjectInvocation
Handler (no security manager: RMI class loader disabled)
The plot thickens. The 1.4 client will connect to the 1.5 server if I
run the 1.4 client classes in a 1.5 jvm. However, when I run the 1.4
compiled classes in a 1.4 jvm I get no joy.
Any ideas anyone?
The context is this: getting a Java strored procedure in an Oracle
database running a 1.4 jvm to send "trigger" information to a java
1.5 server on a different machine.
BTW, the rmi interface is very simple. One method, no return type and
the only passed parameter is a string.
- 14
- Java Parallel Port Programming with the Java Communications APII've read some messages on here regarding the Java Communications API
and the problems some have had with writing to parallel ports. I also
was puzzled by why I couldn't get this to work and then finally
figured out something that worked for me so am sharing this.
First of all, I am using Linux, downloaded the RXTX software,
downloaded the Sun x86/Solaris drivers for the Comm API (yes you need
this even for Windows/Linux), and installed per the instructions.
There were a few snags but the instructions contain much of what you
need to get past these.
The main problem I had was with properly wiring the cable from the
parallel port to drive my external circuits. You definately need some
sort of buffer chips to provide the interface from/to the parallel
port and your external devices (i.e. motors, LEDs, etc) and of course
power that circuit with an external 5V supply. That wasn't the problem
for me though. I had my data lines from the parallel port connected to
drive the external device...but it wasn't working with the Java
Communications API.
After some more tinkering, the trick was to tie the parallel port
status lines 10 & 11 (Ack and Busy) to low/ground and lines 12, 13, &
15 (paper out, select, & error) to high/5V. This should be done
through the output of a buffer chip though. I also tied lines 18-25 to
low/ground.
With that, the Java Communications API worked like a charm. The OS and
driver software must cleary require that the status input lines be
broadcasting signals that indicate the external device is OK...and by
tying the status lines mentioned to the proper signal levels...it
looks as if the external device is OK (i.e. no errors, not busy, has
paper, etc).
Previously, I had the status lines all tied to ground or had them
floating. After looking at a parallel port spec, I figured out what
the status lines are signalling to the system.
I hope this helps some of you trying to do something similar.
Regards,
Paul
/******************************************************************/
Paul J. Perrone
Assured Technologies, Inc.
Web: www.assuredtech.com
Author of various books on J2EE, Java, XML, and Web
Services: http://www.assuredtech.com/books_page.htm
Recently completed project includes the
"J2EE Developer's Handbook" geared for J2EE v1.4.
/******************************************************************/
- 14
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EARLY RETIREMENT IS CALLING
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The NTSB's update outlined factual information about the crash, but did not conclude what the probable cause of the crash was. The full board will likely vote on a ruling at a later date.
Funeral services were also scheduled over the next several days for firefighters Jess McLean, 27, of Beaumont; Daniel Hoover-Najera, 20, of San Jacinto; Mark Loutzenhiser, 43, of Idyllwild; and Pablo Cerda, 23, of Fountain Valley. A public memorial service for all five men was planned for Sunday.
Oyler was charged with five counts of murder, 11 counts of arson and 10 counts of use of an incendiary device. The charges include seven fires in June, one in July, one in September and two in October.
The National Transportation Safety Board said the wind, coupled with the pilot's inability to turn sharply, forced the aircraft away from its intended path over the East River and into the building.
|
| Author |
Message |
mmcmahone

|
Posted: 2004-2-4 23:59:00 |
Top |
java-programmer, Where is the Information Systems industry headed?
Our university is doing some survey work to consider where the world
of IS is headed. Since most of those here work in that world, I'm
interested in your thoughts, especially if you think you have a good
feel for job skills needed now and job skills needed in the future.
The question is sort of two pronged.
First, where are IS jobs headed? Will there continue to be a
significant demand for programming skills? What type of analysis
skills (especially in terms of those that can be developed
academically) are important? Are the requirements changing -- will
things look different in the next five to ten years?
Second, what are the specific things you would think IS majors should
understand when leaving the university? Do you think any of those
things are going to change in the next 5-10 years?
Those are broad questions since I want to leave a lot of room for your
thoughts. I'd like to have some idea of what your role is in your
business and what type of business you are in if you answer (I know
some people don't like to give specifics on here and that's fine --
just "we are a manufacturing company, or I'm a private consultant" is
enough).
Lastly, I'd point out that I'm not interested in specific language
skills, etc. I'm not interested in starting another Sun/Microsoft war
or anything like that. Our philosophy is that even if we use Java/Sun
products for everything we do, you ought to be able to go into a shop
using Smalltalk or .Net or whatever and get up to speed quickly -- so
it's the broader concepts that I'm referring to.
I don't know whether I'll reply to all responses unless I'm looking
for clarification, but I promise I'll give all serious consideration.
Thanks for any ideas,
Marty McMahone
University of Mary Hardin-Baylor
Texas
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|
| |
 |
darren_uk

|
Posted: 2004-2-8 8:34:00 |
Top |
java-programmer >> Where is the Information Systems industry headed?
Marty McMahone wrote:
> Our university is doing some survey work to consider where the world
> of IS is headed. Since most of those here work in that world, I'm
> interested in your thoughts, especially if you think you have a good
> feel for job skills needed now and job skills needed in the future.
>
> The question is sort of two pronged.
>
> First, where are IS jobs headed? Will there continue to be a
> significant demand for programming skills? What type of analysis
> skills (especially in terms of those that can be developed
> academically) are important? Are the requirements changing -- will
> things look different in the next five to ten years?
>
> Second, what are the specific things you would think IS majors should
> understand when leaving the university? Do you think any of those
> things are going to change in the next 5-10 years?
>
> Those are broad questions since I want to leave a lot of room for your
> thoughts. I'd like to have some idea of what your role is in your
> business and what type of business you are in if you answer (I know
> some people don't like to give specifics on here and that's fine --
> just "we are a manufacturing company, or I'm a private consultant" is
> enough).
>
> Lastly, I'd point out that I'm not interested in specific language
> skills, etc. I'm not interested in starting another Sun/Microsoft war
> or anything like that. Our philosophy is that even if we use Java/Sun
> products for everything we do, you ought to be able to go into a shop
> using Smalltalk or .Net or whatever and get up to speed quickly -- so
> it's the broader concepts that I'm referring to.
>
> I don't know whether I'll reply to all responses unless I'm looking
> for clarification, but I promise I'll give all serious consideration.
>
>
> Thanks for any ideas,
>
> Marty McMahone
> University of Mary Hardin-Baylor
> Texas
Tricky one - and I, too, wish I had a crystal ball.
I'm in my mid-30's. I wish to remain such that my skills are not only
profitable, but also marketable (it's pointless being on GBP600/day if,
after the contract finishes, your skills were only useful in that one
contract - give me a stable GBP400/day skillset anyday that would, in the
long run, bring in more money).
But, from my experiences, I got into Unix back in 1988, and I've stuck with
it.
I got into Sybase 6 years ago, and it still, apparently, continues to be the
database of choice of the investment banking industry.
*BUT*, I know that Linux is now being considered as an alternative to
Windows or Solaris or both. I worked a Credit Suisse | First Boston a
couple of years ago and attended a lecture where Linux was about to undergo
feasability tests.
> Second, what are the specific things you would think IS majors should
> understand when leaving the university? Do you think any of those
> things are going to change in the next 5-10 years?
What should they understand? That the only thing that will always be around
is change. Everything else won't always be around.
In my experience, soft skills are more important. An IT (we say IT in the
UK - Information Technology) manager told me once, "If I approached 10
agencies for a good C++ programmer, I'd get 100s of CVs. If I approached
30 agencies or more for a good Support person, I'd get far less responses".
Attitude cannot be learned from a book, only experience and wisdom will
give you that. (Minor gripe: sadly a lot of HR departments don't
understand this and choose to wordcount buzzwords on a CV)
Also, I recently went for some psychometric tests. The Ops Manager said,
"You can't study for these, it's just the way your head is wired up - you
either have it or you haven't". He went onto explain that the reason
psychometric tests were so important to them is because if you fail them,
you probably don't have the natural ability to do the job. An example: one
of the tests was "clerical checking" - if you don't have a natural ability
to accurately and quickly compare two lists, one handwritten say and one
computer printout, then you're unlikely to be able to do a job that
requires this ability as well as the guy who has it.
I met a guy recently who joined this particular company as a chef. Out of
curiosity he did the tests, and sat in a room with two others who were also
sitting the tests: one had a Masters Degree in Computer Science, and other
guy had a lot of experience. Both of them failed, he passed. He's now
team leader in the QA department. He just had a natural ability that the
others didn't have.
I don't have a degree. Yet I have gone into an investment bank and taken
over a failing project from a PhD holder, and done a better job than him.
But he has a PhD, and I don't have any degree.
And I can think of many others I've worked with over the years. Eg, one guy
was described to me by one of his co-workers as, "Technically brilliant,
but a complete cretin when it comes to dealing with people." This person
would spend a lot of time on the phone to traders explaining why their
system wasn't working. Even though he was technically brilliant, he didn't
have the ability to realise that the trader was not interested in this -
only in passing the technical problem onto a technical person so he could
get back to making money on the markets. In my opinion, these are the
types of skills that will always be required.
The moral of all this blabbing? Skills can be quickly learned. Aptitutes,
abilities and attitudes are not so easily learned, if at all.
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brintoul

|
Posted: 2004-2-10 1:54:00 |
Top |
java-programmer >> Where is the Information Systems industry headed?
darren_uk <email***@***.com> wrote in message news:<ZtfVb.1306$email***@***.com>...
> Marty McMahone wrote:
>
>
> The moral of all this blabbing? Skills can be quickly learned. Aptitutes,
> abilities and attitudes are not so easily learned, if at all.
Skills cannot be quickly learned by all at the same pace. Some pick
up certain skills easier than others.
I've run into people who are "technically gifted but just can't deal
with people", too. I've often wondered just how much of the problem
stems from being oblivious to the fact that other 'regular' folk don't
wanna hear technobabble and how much is from loving to hear themselves
talk about what they think they know...
|
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Index ‹ java-programmer |
- Next
- 1
- Java XML Parsing ErrorsHello,
I am new to Java. I need to find two values in XML file, compare them
with other two values and, if match, add to new XML string. Please,
help me with 2 errors:
String new XML = null;
NodeList nodes = document.getElementsByTagName("Car");
for(int i=0; i<nodes.getLength(); i++){
Element e1 = (Element) nodes.item(i);
Element e2 = (Element) nodes.item(i);
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I am learning java and for my beginning, I just used a simple editor to
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I've made a java application and i use a CallableStatement to call a
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retrieve the value of the definded output param but it retuns "" (no
value). The code of the stored procedure is
CREATE procedure pruebaICM
@pANI varchar(20),
@pTABLA varchar(20),
@pInsert varchar(500),
@pUpdate varchar(1000),
@pFLAG varchar(1),
@pResultado VARCHAR(1) OUTPUT
as
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DECLARE @ani varchar(20)
declare @cliente int
DECLARE @sentencia nvarchar(1000)
DECLARE @tabla nvarchar(20)
DECLARE @sentencia_where nvarchar(50)
DECLARE @sql nvarchar(1050)
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set @ani = @pANI
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SELECT @sql
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if (@pFLAG = 'A') or (@pFLAG = 'Actualizar') or (@pFLAG = 'I')
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select @sentencia
EXEC sp_executesql @sentencia
set @pResultado = 1
SELECT @pResultado
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if (@cliente = 1)
begin
set @sentencia = N'update ' + @pTABLA +
N' set ' + @pUpdate
set @sentencia_where = N' where ANI =
' + @pANI
set @sql = @sentencia +
@sentencia_where
select @sql
EXEC sp_executesql @sql
set @pResultado = 2
SELECT @pResultado
end
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if (@cliente = 0)
begin
set @pResultado = 0
SELECT @pResultado
end
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set @sentencia = N'delete from '+
@pTABLA + N' where ANI = ' + @pANI
EXEC sp_executesql @sentencia
set @pResultado = 3
SELECT @pResultado
end
end
end
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windows it works well, the statements
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Thans very much for helping me!!!!!!!!!!!!!
P.D: i'm using jsk1.3.1_04 and sql server 7
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I have a few questions I'm hoping the group could answer for me. I'm
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1) How can I tell what version of the JAVA runtime library I'm running?
2) I'd like to upgrade to the latest version of the RT (J2 V1.4.2). Will my
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3) Do I have to uninstall the previous version before upgrading? If so how
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--
TIA,
Vic
My return email address is S P A M proof
please send replies to: vxp AT sympatico DOT ca
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- How to map the table classes have more than one columns for its primary key in Hibernate?I have two existed tables, I am NOT allow to altering those tables
The 1st table (tableA) has one column for its primary key, the 2nd
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Please see ????? in tow places.
Question 1
1st ???? is <many-to-many> tag in class TableA, but <many-to-many> tag
only allows one column. How do I map it for two columns?
Question 2
2nd ????? is the <key> tag in class TableB, similar that <key> tag only
allows one column. How do I map it for two columns?
Thank Q very much in advance!
<hibernate-mapping auto-import="false"
default-lazy="true" default-access="field">
<class name="tableA" table="TABLEA" entity-name="TableA.class">
<id name="tableAId" type="string" column="TABLEAID"
access="field">
<generator class="native">
<param name="key">TABLEAID</param>
</generator>
</id>
<property name="column1" type="string" column="COLUMN1" />
<property name="column2" type="string" column="COLUMN2" />
.....
<set name="idsa" table="IDS" inverse="true">
<key column="TABLEAID" />
<many-to-many column="????" class="tableB" />
</set>
</class>
<class name="tablesB" table="TABLEB" entity-name="TableB.class">
<composite-id>
<!-- this table's primary key has two columns -->
<key-property name="tableBId1" type="string"
column="TABLEBID1" />
<key-property name="tableBId2" type="integer"
column="TABLEBID2" />
</composite-id>
<property name="column1" type="string" column="COLUMN1" />
<property name="column2" type="string" column="COLUMN2" />
....
<set name="idsb" table="IDS">
<key column="?????" />
<many-to-many column="TABLEAID" class="tableA" />
</set>
</class>
</hibernate-mapping>
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[thufir@localhost java]$
[thufir@localhost java]$ ll lib/
total 184
-rw-rw-r-- 1 thufir thufir 177868 Aug 1 2001 Tidy.jar
[thufir@localhost java]$
[thufir@localhost java]$ ant
Buildfile: build.xml
clean:
[delete] Deleting directory /home/thufir/java/bin
prepare:
[mkdir] Created dir: /home/thufir/java/bin
compile:
[javac] Compiling 1 source file to /home/thufir/java/bin
[javac] /home/thufir/java/src/atreides/tidyXhtml/Test16.java:9:
package
org.w3c.tidy does not exist
[javac] import org.w3c.tidy.Tidy;
[javac] ^
[javac] /home/thufir/java/src/atreides/tidyXhtml/Test16.java:38:
cannot find
symbol
[javac] symbol : class Tidy
[javac] location: class atreides.tidyXhtml.Test16
[javac] Tidy tidy = new Tidy();
[javac] ^
[javac] /home/thufir/java/src/atreides/tidyXhtml/Test16.java:38:
cannot find
symbol
[javac] symbol : class Tidy
[javac] location: class atreides.tidyXhtml.Test16
[javac] Tidy tidy = new Tidy();
[javac] ^
[javac] 3 errors
BUILD FAILED
/home/thufir/java/build.xml:18: Compile failed; see the compiler error
output for
details.
Total time: 4 seconds
[thufir@localhost java]$ cat build.xml
<project name="XHTML" default="package">
<import file="properties.tidy.xml" />
<target name="clean">
<delete dir="${outputDir}" />
</target>
<target name="prepare" depends="clean">
<mkdir dir="${outputDir}" />
</target>
<target name="compile" depends="prepare">
<javac
srcdir = "${sourceDir}"
destdir = "${outputDir}"
classpath = "${tidy.classpath}"
/>
</target>
<target name="package" depends="compile">
<jar jarfile="${outputDir}/${mainClass}.jar"
basedir="${outputDir}"
>
<manifest>
<attribute name="Main-Class"
value="${pkgPath}${mainClass}"/>
</manifest>
</jar>
</target>
</project>
[thufir@localhost java]$ cat properties.tidy.xml
<project name="properties">
<property name="outputDir" value="bin/" />
<property name="sourceDir" value="src/atreides/tidyXhtml/"
/>
<property name="mainClass" value="Test16" />
<property name="pkgPath" value="atreides.tidyXhtml." />
<property name="user.name" value="thufir" />
<path id="tidy.classpath">
<pathelement path="lib/Tidy.jar" />
</path>
</project>
[thufir@localhost java]$
thanks,
Thufir
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- JToggleButton dimension on ToolBar?I have added (besides normal buttons with icons (for example "open
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2. to make that when one is selected, it stays pressed too.
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- Managing files using JavaHi! I'm new to Java and I would like to know how to manage files (e.g. rm,
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pras
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- ** new open source requirements management tool **Hi,
OSRMT v1.1 has been released free under GPL for design
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- custom forms to enter product features, requirements, use cases, test
cases, design etc.
- arrange all of these 'artifacts' within a hierarchal tree
- create dependencies between artifact e.g. feature a --> requirement b
--> source code c,d,e
- traceability matrix, identify artifacts not traced
- generate a dependency graph showing the impact of changing an
artifact (upward/downward)
- attach binary files or insert links to files or URLs with each
artifact
- customize the reference with artifact type specific priorities,
status, version etc.
- enter low level details to artifacts e.g. use case steps, data
fields, test steps etc.
- track entire history of change to artifact
- environment specific username and hashed password
- database independence - Oracle, MySQL, SQL Server, MS Access scripts
supplied
- configure client to connect to database direct or full blown J2EE
(client connects to JBoss)
- Rich Swing client runs anywhere (web client or run client over HTTP
in the future)
- Import/export artifacts from/to XML
- Technologies used include JGoodies (forms), JGraph (dependency tree),
Jakarta (db connection pooling), Rhino (custom scripting
forms/reports), Jasper (reports)
We welcome your review, comments, questions and requests for new
features.
You can download the latest release at http://www.osrmt.com
thanks!
Aron Smith
Fast, free requirements customized your way!
- 15
- Please help for a LinkBinaryTreeInJavaI am new in this group,I don't know how far it would help me.
I tried to make a linked based binary tree following the book "data
structures and algorithms in java" By goodRich and tamassia.I did all
but I wanted to implement a function to determine whether a particular
node exists or not.All I want to implement a function boolean
exists(node n).Can anyone help??My program is as follows:-
import java.io.*;
interface Node {
Object getData();
int getID();
}
class TreeEmptyException extends Exception {
TreeEmptyException(String message) {
super(message);
}
}
class LinkBinTree {
BinNode root;
int size;
LinkBinTree(Object O) {
root = new BinNode(0);
}
class BinNode implements Node {
int id;
BinNode left;
BinNode right;
Object data;
BinNode(int iden) {
id = iden;
left = null;
right = null;
data = null;
}
BinNode(Object O) {
id = 0;
left = null;
right = null;
data = null;
}
public Object getData() {return data;}
public int getID() { return id;}
void addLeft(Object obj) {
BinNode b = new BinNode(obj);
left = b;
}
void addRight(Object obj) {
BinNode r = new BinNode(obj);
right = r;
}
BinNode addLeft(Node n,Object O) throws TreeEmptyException
{
if(!exists(n)) throw new TreeEmptyException("Tree doesn't
exists");
return n.addLeft(O);
}
BinNode addRight(Node n,Object O) throws TreeEmptyException{
if(!exists(n)) throw new TreeEmptyException("Tree doesn't
exists");
return n.addRight(O);
}
void preOrder(Node n) {
LinkQueueApp<Integer> q =new LinkQueueApp<Integer>();
int p=n.getID();
q.enqueue(p);
while(!q.isEmpty()) {
p =q.dequeue();
System.out.println("The pre-order is : "
+n.getData());
for(int i=p;(i==p+1) || (i==p+2)&&i<=size;i++)
q.enqueue(i);
}
}
void boolean exists(Node n) {
if(Node == root) return;
else {
if(Node
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