New to java needs advice

Hi,
I'm completely new to java and after a few days search found Studio Creator and decided to use it. Happily developing for a week in JSC, I reached the deployment to Tomcat stage.
Mybe I'm missing something but I find this stage ruining the ease-of-use feeling which I got when I started using JSC.
Am I right that JSC doesn't have a built-in functionality to deploy to Tomcat whithout my intervention, considering my total unfamiliarity with xml, jsp, mysql, etc.?
If so do you guys know of another easy-to-use IDE like JSC?
Any pointers are greatly appreciated.
Thanks, Abraham

Hi,
Try this FAQ on
How do I deploy web applications developed with Java Studio Creator to the Tomcat Servlet/JSP Container?
at http://developers.sun.com/prodtech/javatools/jscreator/reference/faqs/technical.jsp
MJ

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Very New to Jave, need to do totals/subtotals

Hi, (I hope this is the right place)
I'm VERY new to Java (I mainly do wourk with php interfaces for MyAQL databases).
Up until now, there hasn't been anything I couldn't do with PHP that I needed to...
My boss recently requested subtotals/totals at various points on an input sheet. The sheet inputs numbers of people, so I'm not worried about rounding (The php already takes care of people trying to input parts of people....) or tax.
It's a rather large form (~144 lines) and the math is already in place to do the subtotaling (among other things) before entering the information into the database.
How would I go about writing script that would display sub totals, and recalculate them every time one of the boxes value's is modified?
Is this something javascript is designed to do? Is there a better language out there for this task?
I've found sites out there that have canned subtotal/total scripts, but I don't want something pre-made unless it comes with a detailed explaination of what everything does; if I'm going to maintain it, I have to understand it.
Thanks

Is this a web form? e.g. a html form with input fields?
You can add onchange or onblur events to your input fields to detect changes. Then you can use javascript to retrieve the values from the form and do the calculation.
-S

Hi, i'm new to java. need help setting the path in win XP

hi all,
i'm new to java technology. i've just downloaded the JDK and ran my first java program (hello world). i love it. java's gr8. i need help. i run win XP and how can i setup the path sothat i can execute my programs from the root dir??? any help in this direction will be greatly appreciated. please email me @ [email protected]
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Go to Start menu and select Control Panel. In the Control Panel, double click on System. In the System dialogue, choose the Advanced tab. Then click on Environmental Variables. Select Path and Edit. Put ;c:\j2sdk1.4.0\bin at the end of the Path (or c:\j2sdk1.4.0\bin;) at the start of the Path. That's it.

Syncing iPod to new user account-need advice

Hey All! I set up a new user account for my friend on my imac, so he will want to sync his iPod Touch to iTunes, iPhoto, iCal, etc. in his new user account. I know there are plenty of freeware and shareware apps to get his music from the iPod into iTunes, but need advice concerning everything else oh his iPod.
I know I'll first get that pop up window that says his iPod is synced to another computer, and that I use "cancel" rather than "sync and erase". After doing that, I guess I use one of the shareware apps to get the music transferred over.
Now, after that, if I do a regular sync, will iTunes transfer his apps that are on the iPod?
Do I need to open iPhoto and download the photos on his iPod into iPhotot before doing a sync?
What about text messages? Will they remain in tact?
I don't think he uses the calendar on his iPod so no worries there....
What about Playlists that he has on the iPod? Will just the music transfer with the shareware apps or playlists also?
Will Notes be saved?
Thanks for your help. Don't wanna screw up his iPod by setting up this user account for him.

Apps are tied to the ID I assume the new account is just on the iMac and not a new iTunes account?
Yes, you can import photos into iPhoto the same as you would off any camera.
You would need to transfer purchased content (like apps). You can't do that via sync as it's a new computer and all content will be erased as you are aware.
http://support.apple.com/kb/ht1848
What happened to your friends computer? Was there no backup?

New to java(need help on access specifier)

hi! i am new to java.plzzzzz help me i have to make a project on access specifier's i know all theroy.but
i am unable to understand how i can define all specifiers practicly.i mean in a program.
thanks.plzzzzzzzz help me

the most common project i can think of is a payroll system..
you can have real implementation of all the access specifiers
good luck

New to Java need to parse a page on HTTPS server

Greetings:
I am writing a "widget" on Macintosh that goes out and gets a simple piece of information from a page within a secure sever (HTTPS).
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I would need a good example of code to do this as I am VERY new. If anyone can help please let me know.

http://onesearch.sun.com/search/developers/index.jsp?charset=UTF-8&qt=%2Bparse+%2Bhttps&col=javadoc&col=devforums&col=javatecharticles&col=javatutorials&col=devarchive&col=javasc&col=devall

New to java, need a applet loop

Hello, I am trying to create a simple double buffering tile drawing applet based on a two dimensional map array. I have it working fine, however I would like to create a main loop which will keep calling pain() until the escape key is pressed. Can someone please show me how I can do this? Would I need to call repaint() in paint() until escape is pressed? Here is my code.
import java.awt.Graphics;
import java.awt.Image;
import javax.swing.ImageIcon;
import javax.swing.JApplet;
public class Tile_engine extends JApplet {
private final int TILE_MAX = 4;
private final int TILE_SIZE = 32;
private final int APPLET_WIDTH = 640;
private final int APPLET_HEIGHT = 480;
private final int SKY = 0;
private final int CLOUD_1 = 1;
private final int CLOUD_2 = 2;
private final int RED_BRICKS = 3;
private final int MAP_ROWS = 15;
private final int MAP_COLS = 20;
private Image buffer = null;
private Graphics bufferg;
private Image[] tile = new Image[TILE_MAX];
private final int map[][] =
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     {0,0,1,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
     {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
     {0,0,0,0,0,0,0,1,2,0,0,0,0,0,0,0,0,0,0,0},
     {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
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     {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
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public void paint(Graphics g) {
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Isn't %d an integer? You are passing a double. You need to use the correct formatting type for a double.
When posting code, please use code tags (see button above posting box). It makes the code much easier to read.

New to Java, need assistance

First, I'd like to apologize in case this post is in the wrong place.
Now I'm new to Jcreator and I missed about a month from my computer programming class in school, and am far behind. My assignment right now is this problem p5.12 from Computing Concepts with Java Essentials it says:
"A year with 366 days is called a leap year. A year is a leap year if it is divisible by 4 (for ex.,1980). However, since the introduction of the Gregorian calender on October 15, 1582, a year is not a leap year if it is divisible by 100 (for ex., 1900); however, it is a leap year if it is divisible by 400 (for ex., 2000). Write a program that asks the user for a year and computes whether that year is a leap year., Implement a class *Year* with the method *boolean isLeapYear*
This is the code that I came up with:
import javax.swing.JOptionPane;
public class LeapYear {
     public static void main(String[] args) {
          String input = JOptionPane.showInputDialog("Enter Year");
          double year = Double.parseDouble(input);
          LeapYear newYear = new LeapYear(year);
          System.out.println(newYear.boolean isLeapYear()); //line 11
public class LeapYear {
     private double year;
     public LeapYear(double year)
               a = year;
          public boolean isLeapYear(){
               if(a % 4 == 0)
                         if(a % 100 != 0) System.out.println("Leap Year");
               else if (a % 400 == 0) System.out.println("Leap Year");
               else System.out.println("Not Leap Year");
The error I am receiving is on the 11th line of the test class. I know if there is something wrong besides that. I'm not asking for someone to fix this for me but I would like if somebody could give me advice on what to do, hints, explain where I went wrong, or know of any good tutorials I could read that could help me with this it would be much appreciated.

Year           Is Leab Year?
1           no
4            yes
1580            yes
1582           no
1584            yes
1600            yes
1700            no
1800            no
1900            no
1996            yes
1997           no
1999            no
2000            yes
2100            no
2200            no
2300            no
2400            yes
2800            yes
2900            no
3200            yes
3300            no
3600            yes
3800            no
4000            yes
4200            no
4400            yes
4700            no
4800            yes
5100            no
5200            yes
6400            yes
6500            no
6800            yes
6900            no
7200            yes
7400            no
7600            yes
7800            no

Looking to buy a new system! Need advice!

Looking to buy a brand new mac and somewhat confused by the choices.
Firstly, speed. The default is "Two 2.66GHz Dual-Core Intel Xeon" and I'm wondering what I will get if I go higher. Is it worth going to 3?
The other question I have is about the graphics cards.
I work in the ad business and deal with graphics and some FCP, but not sure which is best.
Will definitely get a cinema display.
Any advice would be appreciated.
Thanks!

If you work professionally and do a lot of FCP, Motion or other highly processor intense work it is probably worth it to spend the extra money since a little speed here and there will make you money...but in that case, go 8 core. Most folks won't see a huge difference between the 2.66 and 3GHz models. Maxing RAM is more important than processor speed for almost everyone. By max I don't mean 32gb . IMHO not much point in getting a Mac Pro without the ATI card. Some things won't need or use it but enough opportunities will arise to make it worth while for anyone doing video and graphics to say nothing of the occasional game. If I were you, in the ad business, I'd look at professional monitors like Eizo. That's what I settled on after extensive comparisons and I'm very glad I did. Get at least 8 gb of RAM. 4x2gb is probably the best configuration to start with so as to allow even more RAM later. I got 4x1gb and am moving to 8gb soon. Adequate. Get the smallest 160gb drive that is offered then put it on a shelf. If you are going to do HD then you'll want to look at RAID arrays. If you are going to do simple DV then populate your machine with 4 x 1TB drives and you're good to go till they fill up heh.

Add RAM or buy a new machine? Need advice please.

Hello,
I am asking this question for a friend who owns a 5 year old iMac. It only has a 500GB hard drive, and it is almost full (475 GB are in use, and we recently had to dump some items because it had reached it's limit). It has the factory-installed 8GB of RAM, but there are two empty slots which can hold 4GB each (or a grand total of 8GB of additional RAM, for a total of 16GB of RAM).
He also is a HUGE user of iTunes, and he has a 1.5 TB external drive that contains all of his iTunes files (we have iTunes set to automatically place all iTunes files onto the external hard drive so that it does not take up hard drive space on the iMac).
He is running OS 10.8, Lion (and wants to upgrade to Mountain Lion).
So, here is my question.....Will adding 8 GB of RAM make this machine "faster"? This machine has gotten very, very slow over the last year. When you launch any application, you get the spinning beach ball for a few minutes and then eventually, sooner or later, the app will come up. But everything moves very slowly----everything.
I was thinking that if we added the 8GB of RAM, that would fix a lot of our slow problems. Am I correct here, or would this not do anything? I was wondering if a 5 year old iMac with 8GB of RAM even has sufficient power to be running Lion in the first place.
Any thoughts on this? Thanks much!

smitty195 wrote:
Will a full hard drive slow down a computer? I was under the impression that it was RAM. This might be very important, because his hard drive is extremely full. Last week, he was getting messages that his hard drive was full, so we took lots of "stuff" out and put it into the trash can and deleted it.
Yes for a couple of reasons. OS X needs plenty of room to move around and work in, plus read and write becomes slower on that part of the hard drives platter.
At this point your friend really needs to backup if he is not already doing so and
1. Farm out his photo's, movies and/or music to an External HD, as per the following article's:
iPhoto '11: Move your iPhoto library to a new location
iMovie '11: Copy or move a project to an external hard disk
iTunes for Mac: Moving your iTunes Media folder
or
2. Have an Apple Authorized Service Provider replace the 500GB Hard Drive with a 1T or larger Hard Drive.

New to java-need help for debugging

hey there
i just wanted my first program in java and here it is below with the error when i'm compiling it, i cant understand whats wrong:
public class SquareArea {
public static void main(String[] args); {
float length;
float width;
float SquareArea;
System.out.println ("Please enter length"+ length);
System.out.println ("Please enter width"+ width);
SquareArea= length*width;
System.out.println ("The area of the square is" + SquareArea);
The error is:C:\Documents and Settings\User\Desktop\SquareArea.java:5: missing method body, or declare abstract
public static void main(String[] args); {
^
1 error
Tool completed with exit code 1

Reading inputs from the command line is a bit complicated in java, here is how it is done:
first add the line:
import java.io.*;to the beginning of your program.
          float length;
          float width;
          float SquareArea;
          BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
          try
               System.out.println ("Please enter length:");
               String lengthStr = reader.readLine();
               length = Float.parseFloat(lengthStr);
               System.out.println ("Please enter width");
               String widthStr = reader.readLine();
               width = Float.parseFloat(widthStr);
               SquareArea= length*width;
               System.out.println ("The area of the square is" + SquareArea);
          catch (IOException ioe)
               System.out.println("Error reading values.");
               ioe.printStackTrace();
          }

Best way to manage new library with new hdd. Need Advice.

I am new to this whole aperture thing. i've been reading about aperture for a few months now. there's just so much to soak in at this moment. i'm about to put in a 320gb hdd in my 1st gen mbp and i would like the best or really just the most efficient way to managing my images. what i am trying to do is import all my images (20gbs right now just family/friend stuff) into my mbp on the new hdd. i am also in the process of getting a 30d or 40d for my photo work.
should i partition out the new hdd for aperture or just keeping it one partition. one of my partitions will be for bootcamp. i just dont want to partition it and run out of space in the partition. i also have 2 externals (300gb and 400gb) that i will use one of them for vault?, external backup. im also trying to scan all my film stuff and put it in there and manage that too. i also want to use iphoto too so is there a way to use one library for both without one or the other making doubles?
i read about the manage and referenced masters methods, but i'm still a little confused on it. i would like to know how you guys manage your libraries and how u organized your folders. i read about people setting up raids on their mac pros but i would like to know more about people who doing the managing on their mbps. i running on leopard but are not using time machine. i currently have my folders setup in this way, i.e. 20080224-vacation pics day 1. there's prolly more to ask but i cant think of any right now. any help is appreciated.

On a laptop generally you do want to manage by Referencing image Masters. Hard drives slow as they fill, so at some point - perhaps immediately - you will want your Masters on one or more external Firewire 800 hard drives. OWC <http://www.owcomputing.com/> "Mercury to go" FW800/USB2 drives are a good external solution if you need portable.
A good rule of thumb is not to fill any drive more than 70%, and for best speed keep important drives no more than 50% full.
With Referenced Masters, simply Finder-copy each batch of images to the external hard drive and eject the camera card. Then (after backup of images) from within Aperture Import the images by Reference (when you go to import, on the right hand side of the import window select "Store files in their current location").
Existing images on your hard drive can similarly be imported selecting "Store files in their current location" however personally I would move the originals to an external drive prior to importing into Aperture because trying to keep originals on a laptop drive will sooner or later overfill the drive.
During the import process is a good time to assign all manner of keywords, so take some time in advance thinking about keywording.
Also, I recommend the US$35 tutorial CD Apple Pro Training Series: Aperture 2 (Apple Pro Training Series) by Ben Long, Richard Harrington, and Orlando Luna (Paperback - May 8, 2008), Amazon.com. Note that the value is in the tutorial, not in using the book as a manual.
Good luck!
-Allen Wicks

About to purchase new Mac Pro - Need Advice

I am about to purchase a new mac pro and have some questions
I am planning to use final cut pro as well as Edius on Boot Camp.
I intend to edit footage in HDV from a sony Z1 and also from the new sony - pmw -ex3 which i will be planning to edit in HD and 24p.
1) the default config for the mac pro is dual 2.8.ghz processors, what advantage gain will i get i upgrade to 3.0 or 3.2, is the extra power worth the money? will this give me more real-time editing
How many layers of HD 1920 x 1080 from the sony pmw-ex3, will i be able to edit in FCP 6.0 without any problems? would you advise more ram
2) i prefer to work from RAID 5 drives and keep system drive separate, this is how i have worked on in PC/Windows environment. Can anyone confirm if i can have one JBOD drive for the system and 3 drives configured as a RAID 5 drive?
Will i be able to use a boot to run windows and also be able to use the RAID 5 drive on windows side?
3) Is anyone using the 3ware RAID 5 side car? what is experienece is this compatible on the windows partition from boot camp
4) How will i be able to preview HD footage?
5) Do i need to invest in a better Graphics
Thanks in advance

Hi,
Here are a few answers.
1. The Mac Pro 2.8 GHz model performs so well that it is difficult to justify paying 28% more for 7% of additional processor power in the case of the Mac Pro 3.0 GHz or 56% more for 14% additional processor power with the Mac Pro 3.2 GHz model. You might see a small 5-10% increase in performance when compressing video with the 3.2GHz model but it certainly would not be worth paying 50% more to me. In addition, Amazon has the 2.8 on sale for $2599 after an easy rebate:
http://www.amazon.com/exec/obidos/ASIN/B000VR4F2Q/arizomacinusergr
That is a $200 savings off the retail price.
2. If you want to use boot camp I would NOT recommend the Apple RAID card. Boot camp does not work with this card which leaves you wondering why you bought the card and how to get around this HUGE limitation. Instead, I would recommend the Areca ARC-1221x, HighPoint RR 3522 or the ARC-1680x if you want a SAS card. All of these cards have new firmware available that provide awesome performance and boot capability with the Mac Pro 2008. I would also get a SeriTek/2eEN4 4-bay and 1TB Samsung HDs. This gives a solid, quiet 4-bay enclosure that can support RAID 5 with any of the cards and you can add a second enclosure later if you want to use all eight external ports with RAID 6 (for added redundancy and increased volume size). This leaves the internal bays available for Boot Camp, Mac OS X, backups or mirrors and provides RAID 5/6 capability that can be configured to perform almost twice as fast as the Apple RAID card and provide double the redundancy with RAID 6. Links with more information are found here:
http://firmtek.stores.yahoo.net/sata2een4.html
http://www.newegg.com/Product/Product.aspx?Item=N82E16822152102
http://www.amug.org/amug-web/html/amug/reviews/articles/highpoint/3522/
http://www.amug.org/amug-web/html/amug/reviews/articles/areca/1221x/
http://www.amug.org/amug-web/html/amug/reviews/articles/areca/1680x/
3. The 3Ware RAID 5 card is not a top pick in the Macintosh market. The options outlined above will provide much better performance and RAID 6 capabilities.
4. You can view the the HD footage on the monitor.
5. You may want a better graphics card but I would try the stock card first. I was surprised how well the ATI radeon HD 2600 XT card performs with Apple applications.
Have fun!

Econometrics/Statistical computaion with Java - Need advice

Dear All,
I need to perform econometrics/statistical computaion for the bank. We were using Matlab from MathWorks.com. Recently, we are planning to perform computation with java instead of Matlab.
e.g. below is the sample equation that I want to evaluate in java -
∆Φ_^(-1) (SDP_t )_ =B_1 〖∆SDF〗_(t-1 )+ B_2 〖∆XXX〗_(t-2 ) + B_3 〖∆linear〗_(t-1)+B_4 〖∆Linear〗_(t-2)
+Z_m
My question is, I have not found API in java though which I can perform calculation. Also, we are performing this type of computation first time in java, does java supports all statistics calculation like standard deviation, mean distribution et cetera.
I came across Apache commons-maths library which provides class related to maths/statistics. (http://commons.apache.org/math/api-1.2/index.html)
Has anyone performed statistics/equation evaluation in java or with Apache commons-maths? Please share your thought?
I appreciate your time reading my post.
Edited by: rasmeh on Jan 28, 2010 12:06 PM
Edited by: rasmeh on Jan 28, 2010 12:07 PM
Edited by: rasmeh on Jan 28, 2010 12:11 PM

the concept of mean distribution must be sth in econometrics that hasn't caught on.
Java math does not define standard deviation or any other stat methods. it's quite easy to program though. to do linear algebra and optimization you will need to call C or Fortran libraries from java. no need to reinvent the wheel.
cheers
s.

New to Java -- Need to know if something is possible

We have an application in which some complex calculations are being done in MatLab. In order to speed things up, we are converting it to C/C++. But there is also a GUI in the MatLab code. This is all to run on Windows.
We will eventually (2 - 4 months from now, after it has been successfully converted and running) need to also port it to Linux. I am thinking that I would like to write the GUI portion in Java, so that it can be easily transferred from Windows to Linux.
There is also an "embedded" portion running in C/C++. This must remain in C++ in because it is a real-time application where literally each microsecond will matter, Java will be too slow. In addition, some of the calculations will run on a parallel processing board, and the COTS libaries that support running on the card are C/C++ libraries.
So, what I want is, to make a Java GUI that I can move from Windows to Linux, and in this GUI, each of the callbacks will then do nothing but call a C++ routine. I need the C++ routine to run completely independent of the Java Virtual Machine, to preserve the speed of the C++ library.
My questions:
If I write the GUI in Java, and have separate libraries/fucntions in C/C++ that are compiled for both Windows and Linux, can the Java GUI call these, and will they run as fast as they would in a normal C++ app? Or will it be slowed down by the JVM, and run at "interpreter speed"?
How do you call the C++ code from inside a Java interpreter? Do we compile it all in a dll, and the dll is called from Java? Do we make a C++ library, and that can be called from the Java GUI? Or is there something else. This must have been done many times, does anybody have any suggestions or experience to get me going. I think I can glom together a simple Java GUI ( I produced some Java programs several years ago), and I can get the C++ libraries going, it is connecting them that I could use some guidance.
Thanks.
- Martin

georgemc wrote:
DrLaszloJamf wrote:
georgemc wrote:
DrLaszloJamf wrote:
georgemc wrote:
Ignore the myth that Java executes slowly because it's "interpreted". It's notHear, hear. Brian Goetz is a good source of Java myth debunking. Check out his columns:
http://www.ibm.com/developerworks/views/java/libraryview.jsp?search_by=practice:
Indeedie. Here's his article I like to trot out on occasions such as this
http://java.sun.com/developer/technicalArticles/Interviews/goetz_qa.html
I love to point out on some benchmarks, Java can be faster that C. "Faster than C? That's impossible!", people sputter, as if C were a physical constant, like the speed of light -- that's "c", folks!That's borne out of the misconception that any operation in Java is simply translated by the runtime into a similar operation in native code, and, were that the case, they'd probably have a point. It completely ignores runtime optimizationsAnd other things like Java's object allocation/GC being superior to malloc(), ...

New to java needs advice

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