Another java newbie question: "Link errors"

In the environments I've attempted compiling in, it seems that there is a just-in-time default, which means that any missing classes are not found until run time.
Is there any way to to run javac so that what we used to call "link errors" will be displayed at compile time?

Java has no .h files, so it shouldn't compile at all if a class is missing, unless:
Someone compiles class Library, they have class Extension available
They give you Library
You compile, javac sees theat "Library" exists and checks no further
At run time, you get errors about Library needs missing class "Extension"
What class is missing anyhow?

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Java language unsatisfied link error how to fix

i get a "java language unsatisfied link error" when trying to get my Weatherlink application to run on my new iMac. It ran OK on my old one. Whats up with this?

Java for OS X 2014-001

C++ newbie gets linking error

Hi,
I am writing my first C++ programs (been a SQL/DB programmer for last 10 years) on Sun Solaris. Here is my source code:
#include <list>
#include <string>
#include <iostream.h>
using namespace std; // You must use this to include STL!
int main()
// Create list instances
list<int> list1; // Empty list
size_t n = 10;
double val = 3.14;
list<double> list2(n, val); // Create n copies of val
list<double> list3(list2); // Create a copy of list2
cout << "Size of list1 " << list1.size() << endl;
cout << "Size of list2 " << list2.size() << endl;
cout << "Size of list3 " << list3.size() << endl;
// We iterate over the elements of list 3 and print its elements
// Create list iterator
list<double>::const_iterator i;
// Print every character in the list
for (i = list2.begin(); i != list2.end(); ++i)
cout << *i << ",";
and getting the following linker error:
/SUNWspro/9.0/exec/SUNWspro/bin/CC -o test test.cpp
Undefined first referenced
symbol in file
std::bad_alloc::bad_alloc() test.o
void*operator new(unsigned,void*) test.o
ld: fatal: Symbol referencing errors. No output written to test
I have heard of Solaris C++ compilers having problem with the use of templates..... is this the problem here or am I just missing some arguments/libraries?
Thx in advance!

In the interest of keeping code examples short and simple, textbook authors do things in their code examples that are not suitable for real-world applications. Apart from "using namespace std", you find global variables and functions with short names, and no attention paid to error detection or recovery. (They also use more explanatory comments in the code than a real-world program should have.)
That's OK when you are illustrating particular language points. You want to highlight the point, and not have a lot of distractions. But in my view, not enough authors go on to explain good programming practice, and show realistic examples.
For the case in point, the Standard Library declares thousands of names. They are in namespace std to help avoid collisions with user-defined names. Once you put "using namespace std" into your code, you import all of those names into the global namespace, creating opportunities not only for compiler complaints due to name collisions, but for subtle errors involving binding symbols to the standard library that you expected to refer to your own definitions.
I never write "using namespace std" in real code. I sometimes use it when creating tiny test cases for bug reports. But as you saw in my earlier comments, the difference in the sample program between a dangerous programming practice and a much better programming practice was one line of code!

Another Programming Newbie Question:

I have read many of the posts from programming newbies like myself looking for advice as to which language to start their programming journey. While helpful, my situation is slightly different and I would appreciate thoughts from those of you who have been doing this for a while.
On one level, like the others, I am interested in beginning programming for my own personal interest and hobby. I want to be able to poke around building stuff for my Mac as I see the need. The second driver however, is a professional one; I work as a management consultant within an IT company.
Much of my work relates to Business strategy and IT alignment. At that level I am expected to bring a business perspective to IT issues and to provide assessments that confirm proposed technology/software solutions are in fact going to add value for the company overall. Basically big picture stuff.
In this role I am not usually asked to bring the same "technical" perspective that a true business analyst would. However, I would like to better understand the methods, terms and concepts that my colleagues use in developing their software. On occasion I am asked to provide a high level requirements analysis, which draws largely upon my business knowledge, but given that that this information is then presented to my developer colleagues I would like to understand things at a more technical level.
So my question is whether I am free to choose any language to begin my learning quest or if there is a language that will better lead me to understanding and communicate the technical side of software development.
Also I know that a lot of the work done in my company is in Java - but there are obviously a wide range include various applications that sit atop various data bases.
I hope my various questions have been communicated clearly enough. I welcome any thoughts or advice that any of you may be able to share with me.
Thanks!
Power Book 12 Mac OS X (10.4.1)

The case of the employee wishing to merge his own admirable desire to learn programming with the requirements of his position is an interesting case that shows, perversely (or so it seems at first--it's actually perfectly logical) that corporations do not necessarily benefit from the talents, drive and ambition of individual employees--and this is not a cynical or sinister notion. Etresoft's analysis and advice is spot-on and I only wish to add a footnote to it: Along with the "getting the job done quickly and simply as possible" fallacy, and the at first glance counter-intuitive proposition that the complex, fragile, and massive solutions actually benefits the corporation qua corporation, one must remember that corporations are not and never pretended to be pure meritocracies nor are they conceived of as sets of individual employees in competition with each other for rewards. That is to say, trying to make one's personal interests into job requirements is far too questing and individual a project to succeed in any corporate (in the neutral sense of "aggregate," not in the sense of conformist) environment The corporate nature of the incorporated business is, after all, its defining characteristic. This means solutions by consensus aimed as much at institutional self-perpetuation as at the maximization of profit will be favored over mavericks following instincts, absolutists assimilating all power to themselves, or the efficient yet eccentric (again, in the neurtral sense of the word) initiatives of earnest employees trying to unite where possible the requisites of their given post with their own private interests. The upshot to all this is this: the attempt to use pre-existing corporate structures and processes for the fulfillment of individual growth and personal satisfaction (which may as a by-product, or accident in the Aristotelian sense, generate corporate wealth) is to look past stated categories and definitions and to ignore historically-observed outcomes. Corporations will not appreciate or benefit from individualistic impulses not because individual satisfaction is suspect but because its ways are inimical to corporate ways--the friction of the indivduals trying to redefine mutually-agreed upon positions and outcomes for selfish purposes costs too much to be indulged. From the corporate point of view, it is a threat to be contained, not an asset to be exploited. Robinson Crusoe had to spend 28 years on an island alone in order to adequately enact his individualism as it relates to capitalism.* The adaptable, nimble, individual-identified employee with his productivity tied to his own appetites, cannot, at least in the abstract, help but work against the aggregate needs of the corporation.
*Excursus: Defoe's 1719 novel is the foundational narrative of capitalist self-production and its major offspring is Max Weber's Protestant Ethic and the Spirit of Capitalism (1920).This is where 18th-century economic theory including Adam Smith, leads us astray today--it was formulated not before the Industrial Revolution--the transition to capitalism took place in the 17th century--but before the aqdvent of the modern corporate structure.

Newbie question: Links to web pages

I'm brand new to Captivate 4, so I apologize for this question. I have several hyperlinks on slides that jump to pages on my company's Intranet. When I publish and preview this project in our LMS (SumTotal), the links work however-- they do not open up a separate window for the Intranet page. When a user closes the page, it closes the activity in the LMS and they get an "Incomplete".
Please advise?
Thanks,
Liz

Hi again
Odd, when I click the link I supplied I get this:
13. I'm linking to a PDF, URL or a Word Document and when I click the Button or Click Box, the movie continues. How do I keep it paused?
Look to the immediate right of where you type the URL or File Name. You should see a button with a down arrow on it. Click this button and you should be able to choose "New". You have probably already found this option.
What you likely missed (and it's super easy to miss) is another option that isn't available until you choose New. The opton is "Continue Playing Project". You need to click the button with the down arrow a second time, then click this option to turn it off.
You said the links weren't opening in a new window. The information I linked to was intended to be twofold:
Coax you into learning how you tweak links to open in new windows.
Coax you into learning how to deal with your Captivate project remaining paused when you open links in new windows.
I guess that's not the case here?
Cheers... Rick
Helpful and Handy Links
Captivate Wish Form/Bug Reporting Form
Adobe Certified Captivate Training
SorcerStone Blog
Captivate eBooks

RFCLIB access from Perl / Java - newbie question

Hi folks,
I am newbie with SAP. I am triying to access the SAP from my web application, wrote in PErl or JAva.
I am trying to access the librfc, bit I would like to know:
1) What software I need to install in my client side (the web server that host my web application)??
2) Which software contains the RFC SDK? or the RFC LIB?
3) Should I runt the script to access the rfclib in the SAP server side???
Please help me with this cruel doubt !!!

Hi,
download the SAP JAVA Connector (SAP JCO) from
service.sap.com
There are enough examples for java.
Best Regards
Frank

Another Java Update Question.

Hello-
I am seeing posts here where people want to disable the current Java for Mac OS X 10.6.update 8. One post said Safari crashes everytime he opens it now that he installed this update.
I am using Safari, "Enable Java" has been checked since I prchased this MBP 3 years ago.
My knowledge is not the best in this area, so I come here to get some help-
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Any suggestions? I have been having so much trouble with my MBP the last 6 months, all I need is something else to conflict and cause more troubles. A trip to the Genius Bar is needed.
TXS!

You should install the update that appeared in Software Update today (April 12). The previous one was released on April 3.
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Java Newbie Question - the import statement

Hi Geeks,
I have a problem for importing a java .class in my project. This latter is named "Tedetis_New". Inside it, I created a "src" folder containing all the source code of the application. I import a jar file inside the parent directory of "src" (i.e. at the root of the project). Inside this jar archive, two classes (.class files) are not placed inside a package (default package according to eclipse), let's name one toto.class. So when I want to import toto.class from a file inside the src directory I simply do "import toto.class" but this statement doesn't work ! I don't manage to import my toto.class so ... what do you propose for this ?
Thanks.

Don't use the "default" class for anything serious;
you can't import such a class.Er, package maybe?Yes, I was editing my reply while you replied to my reply so I couldn't
edit my little blooper in my reply anymore; thank you very much Sir ;-)
kind regards,
JosI entered that response as quickly as I could, for just that reason. I
thought you might notice and try to correct it, and I wanted to preserve
your fuckupus maximus for all eternity.
Everyone gather round and taunt Jos! Wave your private parts at his
auntie! Fart in his general direction!
Now, aren't you glad you didn't say "Jehovah"?I already knew that you were the one who invented amiability ;-)
kind regards,
Jehov^H^H^H^Hos

Java newbie questions...Setting the classpath in Unix

When you set the classpath, how do you include anything already in the classpath? For instance, if your profile sets your classpath to
"/home/weblogic/:home/weblogic/weblogic.jar, and you want to add MyJar.jar to it, can you enter:
export classpath=~:MyJar.jar
My question really boils down to how do you prefix the existing CLASSPATH environment variable to any new classes or jars you want to add to it. I think it's the tilde, but I'm not sure.

In csh, the CLASSPATH environment variable is modified with the setenv command. The format is:
setenv CLASSPATH path1:path2
In sh, the CLASSPATH environment variable can be modified with these commands:
CLASSPATH = path1:path2:...
export CLASSPATH
====
(From the Sun documentation)
or, in sh,
export CLASSPATH=path1:path2
should work

Visio like object drawing in Java - newbie question

Hi all,
Although a reasonably experienced java programmer I am new to the world of 2D graphics.
I am contemplating writing a tool which includes a diagramming capability for displaying computer systems and interactions between them.
I guess this would not be a million miles from what a UML diagramming tool does, but it would definitely have some differences.
So, for example, in this tool a user would be able to:
Define a computer system and allocate an icon for it.
Drag that system icon onto a diagram.
Draw lines between systems and to represent interactions and define what those interactions were.
Does anyone know if there are any Java API's or tools out there which could get me started?
Thanks in advance, Robin.

wpafbuser1 wrote:
Go fly a kite, Troll. OP said he was new and wanted to know which Java API's to use for 2D graphics. Moreover, there are no Java-related API's with diagramming capability. He can Google for that anyway.He's not new to java as he has stated that he is a "reasonably experienced java programmer". He also knows that he will probably need Java2D else he wouldn't be in this forum. If he is reasonably experienced, there's no doubt that he knows about Swing and how it can be used to create GUIs.
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^1^ http://www.jgraph.com/

Threads in Java: Newbie question

Hi
I had a doubt regarding Threads. I have implemented a Security Manager which does not allow a thread to write into a file. Now, the problem is when the thread tries to write into a file, the Security Manager calls my function in which I want to immediately terminate the thread. How do i do this? How do I terminate a thread without using the deprecated Stop() function ?
Thanks in advance
RG

The trick is to make the thread die a natural death... One method is have a boolean somewhere which is initially set to true (maybe call it keepRunning?), and the thread that should die have a while loop which periodically checks to see that this boolean is still true.
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There are more examples, more methods, and probably a better explanation at:
http://java.sun.com/docs/books/tutorial/essential/threads/lifecycle.html
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Another LV newbie question

I am receiving some binary data from my device. The device send a block of
data based on a structure which has 16bit ints, bytes and character strings
etc all mixed.
What is the best way to decode it. In C, I can just include the structure
def and point to the starting memory location.
vishi

Hi,
you must use "Functions->File I/O->Read file.vi".
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You have to create cluster of your 16bit ints, bytes and character strings in proper order and wire it to the VI's input node. Hope this will help.
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Oleg Chutko.

Java newbie question

Hi,
I have the following code:
public class Dice {
public static void main(String []arg){
Scanner scan = new Scanner(System.in);
Random ran = new Random();
public void RollDice(){
     ran.nextInt();
public int returnDice(){
     return ran.nextInt();
}And the compiler yells at me that it can't find the symbol variable ran.
If you create an instance of Dice how would you call it in the methods?

Gimli wrote:
Hi,
I have the following code:
And the compiler yells at me that it can't find the symbol variable ran.
If you create an instance of Dice how would you call it in the methods?
public class Dice {
private Scanner scan;
private Random ran;
public Dice() {
    scan = new Scanner(System.in);
    ran = new Random();
public static void main(String []arg) {
    Dice dice = new Dice();
    dice.RollDice();
    dice.returnDice();
public void RollDice() {
    ran.nextInt();
public int returnDice() {
    return ran.nextInt();
}OR
public class Dice {
public static void main(String []arg) {
    RollDice(new Random());
    System.out.println(returnDice(new Random()));
public static void RollDice(Random ran) {
    ran.nextInt();
public int returnDice(Random ran) {
    return ran.nextInt();
}Just a few ideas to think about.

How do I fix a "Unsatisfied link error"?

ProQuest provides a Java application for auto parts. It did function on my system [10.3.9 with all updates]. After logging in on a web site, a "jnlp" file is loaded to the desktop. Double clicking this file causes another download to load the auto parts database.
But now a, JAVA error Exception reads:
java.lang.Unsatisfied Link Error: no hpwin32 in java.library.path
However a similar file "hpwin32.dll" is in: user/Library/caches/JavaWeb Start/cache/http/Depe.startekinfo.com /... /RN client-native.jar/hpwin32.dll
I deleted the "Depe.startekinfo.com " folder, but it reappeared after logging into their site.
Security is set to accept all cookies and using Safari and Firefox produces same result.
Suggestions are appreciated.
Bob
Quicksilver G4 w 2 HDs, LaCie 22 Mac OS X (10.3.9)

The default VISA timeout is 2 seconds, so your program is missing a byte and timing out. You might want to log your serial port traffic to see the actual data coming through. Portmon is a fantastic tool for debugging serial applications: http://technet.microsoft.com/en-us/sysinternals/bb896644.aspx
Regards,
Jeremy_B
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National Instruments

On one PC but not another I am getting an error message: Exception: java.la

There is an applet on my site which is not loading for some users and not others.
On one PC but not another I am getting an error message: Exception: java.lang.ClassNotFound.Exception:CheckboxApp.class
The name of the applet is CheckboxApp
some other user of my site are also getting similar messages
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It's probably because of the way the html that's calling the applet is coded, in conjunction with the vendor (Sun or MS) and version of the Plugin/JRE. This will help you ger started with diagnosis:
http://java.sun.com/products/plugin/

Another java newbie question: "Link errors"

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