Basic swing question

I just started looking at swing yesterday because I want to provide a GUI to replace a command line utility we use. I've basically finished it but have a quick question about form - I will get some literature later but would like to get a feel from the people here. If you have a JFrame with a few JPanels each which contain some other components, what is the best practice for variable declaration? Should I just declare the variables locally or should I make them instance variables? The reason I ask is that I have a button that submits a message but that message is dependant on check boxes, etc. from from the frame. If I declare them at the method level I then have to start passing them around whereas if I declare them as instance variables I can access them very easily BUT this may not be good form.
For example:
my class is SendMessageToo so in the main method I have a line like:
final SendMessageToo smt = new SendMessageToo();
now all the instance variables that I have can be accessed my the methods simply using smt.methodOne(), etc. Does that seem OK or is it just pure crap? :-)

Thanks, that was something that crossed my mind before I just made eveything an instance variable. It was during that process that I thought, do these all need to be instance variables? Then I thought, SHOULD they all be instance variables. At that point my brain imploded so I came here. :)

Similar Messages

  • Problem - reading an abitrary string from the command line in basic swing

    Hi,
    I'm sorry if this problem is a bit basic, but I've only just started swing in Java. Anyway, I'm trying to adapt a basic swing version of the HelloWorld class. When I try to pass an abitrary string from the command line to the label within the class, I get the following error,
    Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
            at week2.HelloWorldSwing_commandline.main(HelloWorldSwing_commandline.java:31)
    Java Result: 1I must be missing something because I can't see where the problem is in the following code.
    import javax.swing.*;
    import java.awt.*;
    public class HelloWorldSwing_commandline {
        String message;
        private static void createAndShowGui(String message){
            JFrame.setDefaultLookAndFeelDecorated(true);
            JFrame frame = new JFrame("HelloWorldSwing");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            JLabel label = new JLabel(message);
            Container content = frame.getContentPane();
            content.add(label);
            frame.pack();
            frame.setVisible(true);
        public static void main(String[ ] args) {
         createAndShowGui(args[1]);
    }Any help would really be appreciated.

    Hi,
    I've tried changing the index value to O in the main method, but I still get the same error.
    I'm running this in NetBeans 4.1, and when I try to run the class I get the error as listed above.
    Any ideas how to correct this error?
    Thanks

  • Basic iPhoto questions:

    I have some Basic iPhoto questions before I start using the program:
    - does iPhoto apply any compression or change images in any way when they
    are imported?
    - after images are imported, can the original source folder of images be deleted off of the mac?
    - can Quicktime files exported from iPhoto be viewed on a Windows computer?
    - can iPhoto handle large resolution images that might be as large as 8-15mb each? does it display them quick? are there any known file size issues?
    Thanks!!!!

    kat.
    Is there a way to use iPhoto on a network so other users can read and possibly write to an iPhoto library on a networked mac?
    iPhoto is a consumer level photo organiser, not a server. It's possible to share photos but libraries are very difficult and fraught with the danger of database corruption. Some have reported success.
    Is it possible to password protect or secure certain images in the library so they can not be seen by anyone?
    No. The best I can suggest there is to create a second library and store it in a secure area like a protected dmg. But remember, you can only have one library open at a time.
    After photos are deleted from iPhoto, are there any remaining traces or cached files anywhere other than the trash
    If you delete photos from iPhoto and empty the iPhoto trash then the pics are removed from the Finder as well. They remain as findable as any other deleted file from that point, which is, very, if the searcher in knowledgeable.
    Regards
    TD

  • Object class deployment - Basic form question

    OK, I subclass calendar object from Oracle provided standard
    object class. What do I need to deploy to use this form now
    apart from calendar.pll and my fmx. What about the object class
    from which I sub-class. Do I need to compile and deploy that
    also? How will form resolve this on run time the parent object
    class as I really did not copy, just sub class and we do not
    deploy original class? Basic form question. Thanks.

    You can set the "help" property on the field (which gives you the little "information" icon link beside the field).
    You could also try adding another field of another class above or below:
    <Display class='InlineAlert'/>
    <Display class='ErrorMessage'/>
    <Display class='HtmlPage'/>
    ..etc
    -Rob

  • Adding Date/Time Field + X Number of Days - Basic Calculation Question

    I am assuming this is a basic calculation question. New to Adobe LiveCycle Forms.
    I have a simple form containing a table. The table appears as such:
    Text
    Formatted as Date/Time Fields
    Header 3
    Monday
    user wil choose the beginning date (Date/Time) this is DateTimeField1
    Tuesday
    this should calculate DateTimeField1 + 1
    Wednesday
    this should calculate DateTimeField1 + 2
    Thursday
    this should calculate DateTimeField1 + 3
    Friday
    this should calculate DateTimeField1 + 4
    Saturday
    this should calculate DateTimeField1 + 5
    Sunday
    this should calculate DateTimeField1 + 6
    Calculations are performed after the date is chosen for Monday. My mind tells me the simple calculation of DateTimeField1 + 1 is not going to work (and in fact doesn't!) as it needs to change Monday to a number first. I saw on another thread the following:
    Num2Date(Date2Num(Date(DateTimeField1), "DD.MM.YYYY")+7, "DD.MM.YYYY")
    Thought this was going to get me close. No cigars though!
    Any quick help is greatly appreciated. And since I am new to this, details about what needs to be changed would be great too!
    Thanks

    Here an addition for you date field.
    This FormCalc script in the exit:Event will check it the selected date is on a monday.
    If not it will go the days back until the last monday.
    var Selection = Date2Num($.formattedValue, DateFmt(2))
    var WeekDay = Num2Date(Selection, "E")
    var NewDate
    if (WeekDay eq 1) then
              NewDate = Selection - 6
    elseif (WeekDay eq 3) then
              NewDate = Selection - 1
    elseif (WeekDay eq 4) then
              NewDate = Selection - 2
    elseif (WeekDay eq 5) then
              NewDate = Selection - 3
    elseif (WeekDay eq 6) then
              NewDate = Selection - 4
    elseif (WeekDay eq 7) then
              NewDate = Selection - 5
    else
              NewDate = Selection
    endif
    $ = Num2Date(NewDate, "EEE DD.MM.YYYY")
    Hope this helps, too.

  • Basic Exporting Question

    My main question is a very basic exporting question, but here is a super-condensed explanation of my big-picture goal for context:
    Large (~450 MB) aiff on CD --> trim w/ Quicktime --> small (~16 MB) MP3 in iTunes
    I would like to take an audio file (aiff) that is approximately 450 MB and export it from Quicktime and in doing so, reduce the file size and convert it to MP3. When I simply try to export it, it doesn't ask me about what size I want, nor does it give the option of MP3 formatting.
    I have figured out how to reach my goal, but it's a mess. After I make my trims in QT, I have to:
    1. select "share" instead of "export".
    2. It asks me what size I want and I select small.
    3. The file is then exported as a Quicktime movie into Mail and the size is reduced from 450 MB to about 20 MB.
    4. I then have to "right-click" on the attachment in the email that is created,
    5. save the attachment,
    6. discard the email,
    7. import the file into iTunes, and
    8. create an MP3 in iTunes to finally arrive at my goal.
    This seems like a ridiculously convoluted process to change a large aiff to a small MP3 and put it in iTunes. Any suggestions?

    Thanks. I guess the basic answer to my question is that it can't be done in one or two fell swoops. The problem is that it starts on a burned disc, and I need to make edits to it before it ends up in iTunes (to be eventually used in iWeb). I was hoping to avoid juggling back and forth between iTunes and QT. I either would have to send it back to QT to do the edits after -->iTunes-->mp3, or import the large file from the CD to QT, make the edits, save changes, import large file to iTunes, convert to mp3.

  • Really basic Java Swing question

    Hi,
    I'm really stuck, cannot seem to compile anything. I'm using the newest SDK, 1.4 or whatever. Can someone please briefly explain how they'd compile and run a swing program using MSDOS Prompt. Thanks.
    Nick

    Here be an empty swing frameimport java.awt.*;
    import javax.swing.*;
    public class MyJFrame extends JFrame {
      public MyJFrame() {
          super("My first JFrame");
          Container c  = getContentPane();
          JPanel panel = new JPanel();     
          c.add(panel);
      public static void main(String[] args) {
        MyJFrame frame = new MyJFrame();
        frame.setSize(200,200);
        frame.setLocation(200, 300);
        frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
        frame.setVisible(true);
    }You compile and run it in the same way as any DOS based command line program.

  • Few basic SRM questions .......

    I recently completed the SRM training from SAP and I have few basic questions and need help. Full points will be rewarded.
    These are my questions and it is based on SRM 5.0 Classic Scenario with R/3 backend
    1. Invoice  & confirmation transferred to R/3 via  ALE ? .  All other documents are transferred to R/3 via RFC?
    2. Based on the configuration, if the material is available in the backend then reservation will be created. Other wise PO will be created.  For text items, PR will be created.
         a. Who (purchaser) will process the PR in R/3 and how it is processed?.
         b. Who (purchaser?) will process the reservation in R/3 and how it is
             processed?. Assume no sourcing is setup in this case and No MRP run.
    3. How the vendor is linked to the Material or product category in SRM?. During the vendor replication from R/3, vendor and material/prod category link is automatically maintained?
    4. How the vendor is linked to a specific purchasing org/group? Is it based on the prod category assigned in the org structure for each purchasing org or purchasing group?
    5. How to do delta prod category replication?
    6. How to do Delta Material Replication?.
    7. Contracts and vendor list:-
        In our SAP training we created these from the browser. But in the actual
        implementation how do we create this?. Is it always from the browser?
    8. Direct Material and Plan driven Procurement.
       Can we use catalog items as direct material?. Just for example - > What
       about ‘Car Batteries’ that  is directly used in production and has the inventory
       also. But we are using electronic catalog for procuring this item. Is it possible to
       order this as direct material?
    9. How to replicate Plant. How to use DNL_PLNT?. Is BBP_LOCATIONS_GET_ALL will replicate all the PLANT's and its locations from the R/3 backend?
    10. In the HR system, which transaction we can view the org structure?

    Hi
    Answers to your questions ->
    1. http://help.sap.com/saphelp_srm50/helpdata/en/e9/d0fc3729b5db48e10000009b38f842/frameset.htm
    http://help.sap.com/saphelp_srm50/helpdata/en/74/ec7b3c91c1eb1ee10000000a114084/frameset.htm
    http://help.sap.com/saphelp_srm50/helpdata/en/55/d77c3c3fd53228e10000000a114084/frameset.htm
    http://help.sap.com/saphelp_srm50/helpdata/en/77/e97b3c91c1eb1ee10000000a114084/frameset.htm
    2.  Provided the necessary role is given to the Purchaser (Buyer) in the System.
    a) Yes
    b) Yes
    3. http://help.sap.com/saphelp_srm50/helpdata/en/e5/f5e938b4ece075e10000000a114084/frameset.htm
    http://help.sap.com/saphelp_srm50/helpdata/en/70/00c73a584611d6b21700508b5d5211/frameset.htm
    4. http://help.sap.com/saphelp_srm50/helpdata/en/2c/867d3ca2156c6ae10000000a114084/frameset.htm
    The vendor ORG has to be seperately created through trasaction PPOCV_BBP before replicating the Vendors from the R/3 System.
    http://help.sap.com/saphelp_srm50/helpdata/en/70/00c73a584611d6b21700508b5d5211/frameset.htm
    5. http://help.sap.com/saphelp_srm50/helpdata/en/42/d3b671ba67136fe10000000a1553f7/frameset.htm
    6.  http://help.sap.com/saphelp_srm50/helpdata/en/29/d586398dcfd74fe10000000a11402f/frameset.htm
    http://help.sap.com/saphelp_srm50/helpdata/en/05/9b8139437eac2ae10000000a11402f/frameset.htm
    http://help.sap.com/saphelp_srm50/helpdata/en/f5/b4bcdac7c40c4dba53e3695d18236c/frameset.htm
    7. Yes, from Browser it's quite easy and is quite user-friendly.
    8.
    http://help.sap.com/saphelp_srm50/helpdata/en/d3/4b9c3b122efc6ee10000000a114084/frameset.htm
    http://help.sap.com/saphelp_srm50/helpdata/en/18/db183d30805c59e10000000a114084/frameset.htm
    9.
    You can use the following three routines to download locations from the backend system and store them as business partners in SAP Enterprise Buyer.
    BBP_LOCATIONS_GET_ALL
    To get all the location numbers from each backend system that is connected
    BBP_LOCATIONS_GET_FROM_SYSTEM
    To get all the location numbers from one particular backend system
    BBP_LOCATIONS_GET_SELECTED
    To get selected locations
    Previously, locations were not given business partner numbers in SAP Enterprise Buyer. If you are configuring an upgrade, you can use routines BBP_LOCATIONS_GET_FROM_SYSTEM and BBP_LOCATIONS_GET_SELECTED to check that the following conversions have been made:
    ·        Conversion of user favorites
    ·        Conversion of user attributes
    ·        Conversion of old documents
    Routine BBP_LOCATIONS_GET_ALL checks these automatically.
    Once you have run the routines, the location data is available in the SAP Enterprise Buyer system. Table BBP_LOCMAP contains the mapping information (in other words, which business partner number corresponds to which location in which backend system).
    For more information, see SAP Note 563180 Locations for EBP 4.0 – plant replication
    http://help.sap.com/saphelp_srm50/helpdata/en/62/fb7d3cb7f58910e10000000a114084/frameset.htm
    http://help.sap.com/saphelp_srm50/helpdata/en/77/e97b3c91c1eb1ee10000000a114084/frameset.htm
    10. PPOCA_BBP(Create) / PPOMA_BBP(Change) / PPOSA_BBP(Display).
    Regards
    - Atul

  • Switching to mac, basic noob questions

    Hi, I'm new to this. I have some xmas and bday money and i need a laptop. I have two desktop PC's (one XP and one Vista) and have had PC's all my life. I feel like switching it up and giving macs a try, it would make my purchase more fun. I've done some research and i think i want the black macbook with 2 gigs of ram. Here are some questions i need answered before going much further.
    1.) I notice that every 6 months new macbook models come out. I also noticed that the last three (at least) have been very similar in hardware. Is it common that the new macbook probably coming out in the summer will be unvieled at macworld? If there is a big difference i might wait, i don't want to get the last model in a product line. Id the difference is another slight processor speed increase i won't bother waiting. As far as i know this isn't available information yet, so i'm just looking for a 'usually they do/don't' type of response.
    2.) Is the apple care support really all it's cracked up to be? I'm not about to let my purchase go to waste on me, but at the same time if the support is rarely needed i might not bother. I'm a student and don't have too much money to blow if it's usually a waste. I generally like getting the warrenty for my things, i'm just looking for a more experienced opinion.
    3.) Are the Apple stores in the Best Buys independent from Best Buy, or are they the same? I would like to put the 900 or so dollars i can down on this and put the rest of my best buy card to pay off over the next few months.
    4.) If they're the same, does anyone know if the apple computers fall under best buy's "no interest for blank months of purchases over black?"
    thanks!

    Hi Thomes08!
    Welcome to Apple Discussions.
    It sounds like you're in the process of making an excellent decision to go with a 2.2GHz "BlackBook" and up your RAM to 2.0GB. I think you'll be extremely pleased with your purchase.
    1.) Unfortunately, these forums are not designed to be used as a means of product speculation. Matter of fact, it's against the Terms of Use (of these discussion pages) to speculate on upcoming product releases. We'll have to wait the 2-weeks for Mac World to see what comes out, there's no way to have any insight into the excitement that Steve's Keynote brings to technology.
    2.) I'm a big fan of AppleCare, mostly because it ensures peace of mind over the reliability of my product for the 3-years that it'll serve as my primary machine. While, I've had multiple Macs last beyond 3-years, I also typically swap it out for the "latest and greatest." Especially with a portable and your student discount. The cost of APP for a MacBook is a relatively "no brainer" especially if you consider the cost (for parts & labor) of even the most basic repairs if the machine falls out of warranty.
    3. I'm not entirely familiar with the logistics of the agreement that Apple has with Best Buy, so I'd rather not speculate. I do know that Apple also offers financing options through BML (Bill Me Later) and Juniper Bank, but I'm unfamiliar with the specifics of a split payment. Buying an Apple product through Best Buy still entitles you to all the same "benefits" of ownership, so there's no advantage (or disadvantage) to shop @ Best Buy.

  • 4 basic java questions..

    ok so I already learned Java last year (in grade 11), but my teacher didn't really teach anything, we learnt everything by ourselves from the API... so theres a lot of things I actually don't understand, but for now I want to ask 4 basic questions:
    1. What does static mean?
    2. Why would u "final" a constant variable? ie. If you have a variable called SIZE which is set to 5, so if u want it to be a constant, just never change its value. But what does the keyword final do to it?
    3. What's super? I see it sometimes, and my teacher showed us in the applet exampls to use super.paint(g) or somethign like that for the paint method, but I never use that because I noticed it works fine without it..
    4. Whats a question mark? I saw a game that was made in java and it had a lot of places where it had a question mark , which was part of the syntax. For example,
    int j1 = i != 0 ? i - 1 : 199;
    OR
    JUMPVEL = (fSuperSlime) ? 65 : 31;
    I really don't understand these lines...
    feel free to answer any of these questions...

    wow cool...thanks.. that question mark thing is nice
    saves a few lines..
    now, about super, so u mean u can access the parent
    class's variables?Variables, methods, constructors, if the access level is such that it's allowed.
    This will be covered in any tutorial or text though.
    Sun's basic Java tutorial
    Sun's New To Java Center. Includes an overview of what Java is, instructions for setting up Java, an intro to programming (that includes links to the above tutorial or to parts of it), quizzes, a list of resources, and info on certification and courses.
    http://javaalmanac.com. A couple dozen code examples that supplement The Java Developers Almanac.
    jGuru. A general Java resource site. Includes FAQs, forums, courses, more.
    JavaRanch. To quote the tagline on their homepage: "a friendly place for Java greenhorns." FAQs, forums (moderated, I believe), sample code, all kinds of goodies for newbies. From what I've heard, they live up to the "friendly" claim.
    Bruce Eckel's Thinking in Java (Available online.)
    Joshua Bloch's Effective Java
    Bert Bates and Kathy Sierra's Head First Java.
    James Gosling's The Java Programming Language. Gosling is
    the creator of Java. It doesn't get much more authoratative than this.

  • Basic interview questions in abap ddic

    can any one pls give me the link for basic ddic interview questions

    Check these threads.
    need real time interview questions on data dictionary
    The specified item was not found.
    data dictionanry

  • Basic database question, and subscribe/unsubscribe code

    Hi there
    Although I've created and manage a website, and about a million years ago I worked with databases, I'm still a bit green and in need of some help ...
    I have the website based on my local machine (laptop).  I want to use a subscribe/unsubscribe for a newsletter via the website.
    Before I go ahead with this, I need to clarify a very basic database issue ... would I have to always leave my laptop running in order for people to be able to subscribe to the newsletter on the website, i.e. will it still connect to the database if the laptop is not running?
    I'm using Dreamweaver 3, so I hope I can use this version to connect with a database?  I did install Dreamweaver 4 on one occasion with the intent of upgrading the website to it, but because I'm still a bit unsure of myself and was unfamiliar with the changes the newer version created, I decided to leave it on Dreamweaver 3 rather than risk stuffing the website up completely!
    I also have Dreamweaver UltraDev but for some reason it won't install.
    I'm hoping to follow instructions given on Dreamweaver Developer Centre for setting up a PHP development environment (http://www.adobe.com/devnet/dreamweaver/articles/setting_up_php.html).
    If anyone would be so kind as to advise whether I'm on the right track with all this, using Dreamweaver 3, that'd be great!
    Also, I'm sure this is unlikely, but is there any way to include a subscribe-unsubscribe without having to actually use a database?
    Many thanks in advance    :-)
    Cheers, Chrissie

    Thanks for your help and advice - much appreciated.  I'm going to go the way
    of hosting, as you suggest, and save myself the heartache  
    Quoting jj12689 <[email protected]>:
    To answer your first question, yes your laptop needs to be powered on
    for users to be able to access the database and subscribe/unsubscribe.
    There is another way of doing it, but it requires more work on your
    part. You could make an online program that would generate SQL
    statements and place them in a text document on the server. Every time a
    user subscribes/unsubscribes it would add them to the end of the text
    document. Then you could make an update button on a back-end admin page
    that you would have to push that would take that text file, open it and
    take the sql statements and submit it to the database on your computer.
    I would advise against this method, since it is time consuming, and not
    very fast for today's world. I would recomend using a server based
    database, if the host you currently have dose not have a database, I
    would recomend finding another host. I use surpasshosting.com for my
    hosting because they are cheap, reliable, and have all the requirements
    I need.
     
    Hope this helps...
    >

  • Premiere Elements 7 Basic Editing Question for DV

    Hello all,
    I have PE7, a Q6600 quad-core, and Windows 7 64bit.
    I have captured about 6 hours of Standard Definition 16:9 DV footage from my church's grand opening ceremony.  Video was captured from an old Pana PV-GS320.
    The church wants a dynamic video to be produced from the captured footage (60 minutes at the most in length).  I plan on doing many different effects including semi-transparent video layering, picture in picture, inserting photographs, and inputing audio clips from the ceremony.  The final product will be a standard definition DVD disc.
    I've done some research regarding how DV is interlaced and output for  DVD should be interlaced (unless I'm wrong in that conclusion, let me  know).  I also know that doing heavy editing with interlaced footage  (slowing/speeding footage, zooming in and out, rotating, multiple  layering, etc) may create flickering and "mice teeth" in the video.  I've also searched through these forums and keep on running into HD  questions/solutions...  I guess I'm asking an old question that was probably  answered long ago when DV tape ruled the world.
    QUESTION 1:
    So, if I may ask, in order to get the best results, should I prepare my raw footage in PE7 before editing it by (1) by deinterlacing it? (2) exporting it as progressive? (3) both? (4) leave it alone and begin editing away? or (5) am I missing another option?
    QUESTION 2:
    Also, what resolution would be best to import the photos into the project?
    I know the best way to work with any video is to make as little changes as possible to it, but this is unavoidable in my case.  No one wants to sit through 6 hours of video...
    Thankyou very much for reading my questions and I really hope you have some time to answer it!  Thanks for any information!  I really appreciate it!
    -141rockwell

    Relax, rockwell. You're making it all unnecessarily complicated.
    If you've captured your video as DV-AVIs over a FireWire connection, you won't get "mice teeth" in your final product. The program is designed to work with interlaced video and create interlaced DVDs. The results should look virtually as good as the original footage! You can't damage video with "excess editing."
    Just trust the program to take care of the technical issues. You can concentrate on the editing.
    As for any photos you want to add, you'll get the best results if they're no larger than 1000x750 pixels in size, per the FAQs to the right of the forum.
    http://forums.adobe.com/thread/431851?tstart=30
    Meantime, if you're looking for some basic help with the program, be sure to check out my free 8-part Basic Training tutorials at Premiere Elements support site Muvipix.com.
    http://forums.adobe.com/thread/537685?tstart=0

  • InDesign CS3 basic setting question

    I just upgraded this weekend and cannot find the preference or setting that allows me to 'show all menu items' without having to click on them. Under every menu and sub-menu item there is an entry for 'show all menu items.' I'd like all the lists to be fully expanded if that is possible.
    Thanks in advance for pointing me in right direction on such a basic question.
    (Mac Pro, Leopard)

    Edit - Menus

  • 2 swing questions: JScrollPane and displaying pictures

    I'm building a GUI for a toy application I have written, I have two questions:
    1-The main window is inherited from JFrame, There is a JTabbedPane attached to it, and a JPanel as the first tab of the tabbed pane. There are so many jcomponents in this JPanel, this makes it too big for small resolution computers (below 1024 * 768), I would like to add this JPanel to a JScrollPane to make it behave like a text area, I've done it but it didn't work, obviously there is something I'm missing.
    2-My application calls another program to create some images at runtime which will be displayed in the other tabs, after calling the program and creating the image, I get the filename of the image. What is the best way to display this image?
    I have tried JLabel's but they don't update their pictures for some reason after it has been changed.
    Thanx in advance.

    Updated and tested code, hopefully this will help.
    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.*;
    import java.awt.image.*;
    public class ImagePanel extends JPanel {
      private String imageFilename = null;
      private Image image = null;
      private Toolkit toolkit = null;
      public ImagePanel() {
        super();
        toolkit = Toolkit.getDefaultToolkit();
      public void setImageFilename(String filename) {
        imageFilename = filename;
        try {
          image = toolkit.createImage(imageFilename);
          setPreferredSize(new Dimension(image.getWidth(this), image.getHeight(this)));
          repaint();
        } catch (Exception e) {
          e.printStackTrace();
          imageFilename = null;
          image = null;
      public Dimension getPreferredSize() {
           if (image == null) return new Dimension(0, 0);
           else return new Dimension(image.getWidth(this), image.getHeight(this));
      protected void paintComponent(Graphics g) {
           Insets insets = getInsets();
           g.setColor(Color.white);
           g.fillRect(0,0, insets.left + getWidth(), insets.top + getHeight());
        if (image != null) {
          g.drawImage(image, insets.top, insets.left, this);
      public void reloadImage() {
           if (imageFilename != null) {
          try {
            image = toolkit.createImage(imageFilename);
            repaint();
          } catch (Exception e) {
            imageFilename = null;
            image = null;
      public static void main(String args[]) {
           JFrame frame = new JFrame();
           frame.addWindowListener(
                new WindowAdapter() {
                     public void windowClosing(WindowEvent we) {
                          System.exit(0);     
           frame.setSize(600, 400);
           JPanel parentPanel = new JPanel();
           parentPanel.setLayout(new GridLayout(1,1));
           JTabbedPane tabPane = new JTabbedPane();
           ImagePanel imagePanel = new ImagePanel();
           JScrollPane scrollPane = new JScrollPane(imagePanel);
           imagePanel.setImageFilename("C:\\dell\\drivers\\R27748\\mrmfiles\\image015.jpg");
           parentPanel.add(scrollPane);
           tabPane.addTab("Tab 1", parentPanel);
           frame.getContentPane().add(tabPane);
           frame.show();
    }

Maybe you are looking for

  • Install Windows 8 on 13" late-2011 macbook pro (incompatible?)

    I'm trying to install Windows 8 on my Macbook Pro 13" i7 (late-2011) using bootcamp. I've got Mountain Lion 10.8.3, which I assume means Boot Camp 5. According to this article (http://support.apple.com/kb/HT5634?viewlocale=en_US), my computer should

  • How can I make my MacBook Pro wake up faster?

    Dear all, I have a MacBook Pro 13" Mid 2012. It is awfully slow when waking up after being in sleep mode for a long time (> 1 h). I read that other people here in the community are having the same trouble, and that it seems to be related to the stand

  • EJB Dependencies in WebLogic

    I have what I hope is a fairly straightforward question, but I can't seem to figure it out from the documentation. I'm using Weblogic 6 and JBuilder. I'm trying to deploy an EJB. In the application folder of my Weblogic Server I put the .jar file for

  • Loading Images CS5 32 & 64 bit

    When I load an image (jpeg etc) into Photoshop it shows up in the layers palet as a background but does not show in the workspace, where I see a chequered background. How do I overcome this? What am I missing? This is the trial version of CS5 Extende

  • File I/O - JVM's responsibility or the O.S's ?

    Hi All, Try this. BufferedWriter lWriter = new BufferedWriter(new FileWriter("sample.txt"));      lWriter.write("Hi !"); lWriter.newLine(); lWriter.flush(); System.out.println("Finished writing to file");      /* wait for some time before writing aga