Help Needed - Swing Interview

I m preparing for Interview. I have very less time to prepare. Guru's Could you please provide interview question and tutorial's in swing.
and what to concentrate more.
Regards
Selva

To quote the Java tutorial:
"The single-thread rule is as follows:
Rule: Once a Swing component has been realized, all code that might affect or depend on the state of that component should be executed in the event-dispatching thread.
This rule might sound scary, but for many simple programs, you don't have to worry about threads. Before we go into detail about how to write Swing code, let's define the term realized.
Realized means that the component has been painted on-screen, or that it is ready to be painted. A Swing component that's a top-level window is realized by having one of these methods invoked on it: setVisible(true), show, or pack. Once a window is realized, all the components that it contains are realized. Another way to realize a component is to add it to a container that's already realized. You'll see examples of realizing components later."

Similar Messages

Help Needed for interview....

Hi Experts....
I am attending interviews.... where i am frequently asked by a question....
What is the tuffest scenario you faced and how do you solved that????....
could anyone share their situation faced with the solution.....
Hope some expert is going to Help.
Point will be rewarded****

Hi Harsha,
Just for points no expert has time to respond with a detailed scenario. There are plenty of blogs related to IDocs and involving BPM. Choose the one that is toughest for you. Follow it. Practice it. FInd out all the difficulties you faced. Note down what did you do to solve them. And there you go.. you must have the answer by then.
All the best.
VJ

JCmboBox setSelectedIndex help needed !!!!!!!!!!!!

hi,
I hope it's a trivial question but I am not able to solve it so need your help plz. I have a demo program if you run it you will see what I mean. Actually I am adding items to my JComboBox dynamically. My problem is that if I add the items with the same name and then explicitly set them selected my first item with same name is always highlighted and selected even though I say to select the last item which I add. But when I pull down the comboBox my first item with the same name is selected and highlighted not the last one. Please run the program and see. How can I solve this problem help needed.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ComboBoxDemo extends JPanel {
JButton picture;
public ComboBoxDemo() {
String[] petStrings = { "Bird", "Cat", "Dog", "Rabbit", "Pig" };
// Create the combo box, select the pig
final JComboBox petList = new JComboBox(petStrings);
picture = new JButton("ADD");
picture.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
petList.addItem("TEST ");
int nodeTotal = petList.getItemCount();
petList.setSelectedIndex(nodeTotal-1);
setLayout(new BorderLayout());
add(petList, BorderLayout.NORTH);
add(picture, BorderLayout.SOUTH);
setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
public static void main(String s[]) {
JFrame frame = new JFrame("ComboBoxDemo");
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);}
frame.setContentPane(new ComboBoxDemo());
frame.pack();
frame.setVisible(true);
I want to select the last item I add even if there exists an item with same name.
Any help is greatly appreciated.
Thanks.

never mind I got the answer.
Tnaks

T400 - Accidentaly formatted the disk 1 (IMD-0) partition in disk management - Help Needed

Hello,
Initially when I re-formatted my computer to get rid of the factory image, I found that there was a hidden partition of 1.37GB which I could not touch, meaning i could not delete. I ignored it at that time and formatted my computer and reinstalled vista business on it using the license i got from lenovo. Now after some days, I was kind of getting concerned as to what exactly was the 1.37Gb partition on my computer. I guess I was getting worried as to why I was not able to reclaim that space for normal use. Today, I tried to reclaim it, by deleting the volume, thinking it should merge into the unallocated space, that I have on my primary hard drive. But it did not. However, what happened was that this space of 1.37GB did start showing up on My Computer, once I formatted it using NTFS. I then checked its properties in My Computer and it had an option of readyboost. I selected the option which says use this disk for readyboost, and immediately in no time, the disk was full with on 68MB remaining as free space. It also has an icon of readyboost in the drive, when I double-click it. This is when I figured that this space could be on a separate physical disk. I did some research and found out that this drive or device or chip, is listed as Disk-1 in disk management and as IMD-0 under Disk Drives in Device Manager. I googled about it, and found that it was related to the turbo memory. Now, I believe that turbo memory would be a separate flash chip, which would be hardwired to function in a particular way (enabling boosting speeds), and that it would be non-accessible to users from within windows for formatting or doing anything else. Hence, I also believe that the space which I reclaimed, is existing on my primary 320GB hard drive and is used in addition to the turbo memory, as a cache, to boost speeds. However, since I do not understand the turbo memory concept very well, I would really appreciate if someone could explain how the turbo memory works, i.e. including IMD-0 and all that. And the main help I need is on how to hide the 1.37GB partition again, and put it in a format that it was earlier in, and usable for turbo memory. At present I do not know if it is being used by turbo memory or not, but below is the current status of the turbo memory:
1. In Device manager, under disk drives, IMD-0 shows up, and in properties it just says device type -- disk drive. Now I read somewhere that it should say NVCACHE, but it does not say that on my pc, under any tabs of the properties of IMD-0. Can someone help me putting it back there.
2. Under Disk Management, it says Local Disk H:, 1.37GB NTFS, Healthy (Active, Primary Partition). I don't exactly remember, but I guess prior to me formatting it, it said unallocated. Help needed here too.
3. In the Turbo memory controller, it says Windows readyboot enabled, Windows Readydrive enabled, 2GB
and below that I have checkboxes for enabling windows readyboost and readydrive checked.
So guys, can please anyone help me in re-hiding the 1.37GB partition and making it in the state it was before.
Thanks a lot for your help.

Hi Eric,
Please refer the following HP article to expand your array , refer the TechNet article to expand your drive:
HP Proliant Servers - How to Expand an Array and Extend the Logical Drive
http://h20566.www2.hp.com/portal/site/hpsc/template.PAGE/public/psi/mostViewedDisplay/?javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.endCacheTok=com.vignette.cachetoken&javax.portlet.prp_efb5c0793523e51970c8fa22b053ce01=wsrp-navigationalState%3DdocId%253Demr_na-c03510253-1%257CdocLocale%253Den_US&javax.portlet.tpst=efb5c0793523e51970c8fa22b053ce01&sp4ts.oid=4231377&ac.admitted=1411638027623.876444892.199480143
TechNet article:
Extend System/Boot Volume on Windows Server 2008/ Windows Vista/Win7 Beta
http://blogs.technet.com/b/mghazai/archive/2009/02/24/extend-system-boot-volume-on-windows-server-2008-windows-vista-win7-beta.aspx
Extend a simple or spanned volume
http://technet.microsoft.com/en-us/library/cc776741.aspx
I’m glad to be of help to you!
*** This response contains a reference to a third party World Wide Web site. Microsoft is providing this information as a convenience to you. Microsoft does not control
these sites and has not tested any software or information found on these sites; therefore, Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. There are inherent dangers in the
use of any software found on the Internet, and Microsoft cautions you to make sure that you completely understand the risk before retrieving any software from the Internet. ***
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

Troubleshoting help needed: My iMac keeps crashing and restarting with a report detail: "spinlock application timed out" What can I do to fix this?timed out"

Troubleshooting help needed: My iMac keeps crashing and restarting with a notice: "Spinlock application timed out" What can I do?

Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the page that opens.
Select the most recent panic log under System Diagnostic Reports. Post the contents — the text, please, not a screenshot. In the interest of privacy, I suggest you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header and body of the report, if it’s present (it may not be.) Please don't post shutdownStall, spin, or hang reports.

Help needed for writing query

help needed for writing query
i have the following tables(with data) as mentioned below
FK*-foregin key (SUBJECTS)
FK**-foregin key (COMBINATION)
1)SUBJECTS(table name)
SUB_ID(NUMBER) SUB_CODE(VARCHAR2) SUB_NAME (VARCHAR2)
2           02           Computer Science
3           03           Physics
4           04           Chemistry
5           05           Mathematics
7           07           Commerce
8           08           Computer Applications
9           09           Biology
2)COMBINATION
COMB_ID(NUMBER) COMB_NAME(VARCHAR2) SUB_ID1(NUMBER(FK*)) SUB_ID2(NUMBER(FK*)) SUB_ID3(NUMBER(FK*)) SUBJ_ID4(NUMBER(FK*))
383           S1      9           4           2           3
384           S2      4           2           5           3
---------I actually designed the ABOVE table also like this
3) a)COMBINATION
COMB_ID(NUMBER) COMB_NAME(VARCHAR2)
383           S1
384           S2
b)COMBINATION_DET
COMBDET_ID(NUMBER) COMB_ID(FK**) SUB_ID(FK*)
1               383          9
2               383          4
3               383          2
4               383          3
5               384          4
6               384          2
7               384          5
8               384          3
Business rule: a combination consists of a maximum of 4 subjects (must contain)
and the user is less relevant to a COMB_NAME(name of combinations) but user need
the subjects contained in combinations
i need the following output
COMB_ID COMB_NAME SUBJECT1 SUBJECT2      SUBJECT3      SUBJECT4
383     S1     Biology Chemistry      Computer Science Physics
384     S2     Chemistry Computer Science Mathematics Physics
or even this is enough(what i actually needed)
COMB_ID     subjects
383           Biology,Chemistry,Computer Science,Physics
384           Chemistry,Computer Science,Mathematics,Physics
you can use any of the COMBINATION table(either (2) or (3))
and i want to know
1)which design is good in this case
(i think SUB_ID1,SUB_ID2,SUB_ID3,SUB_ID4 is not a
good method to link with same table but if 4 subjects only(and must) comes
detail table is not neccessary )
now i am achieving the result by program-coding in C# after getting the rows from oracle
i am using oracle 9i (also ODP.NET)
i want to know how can i get the result in the stored procedure itsef.
2)how it could be designed in any other way.
any help/suggestion is welcome
thanks for your time --Pradeesh

Well I forgot the table-alias, here now with:
SELECT C.COMB_ID
, C.COMB_NAME
, (SELECT SUB_NAME
FROM SUBJECTS
WHERE SUB_ID = C.SUB_ID1) AS SUBJECT_NAME1
, (SELECT SUB_NAME
FROM SUBJECTS
WHERE SUB_ID = C.SUB_ID2) AS SUBJECT_NAME2
, (SELECT SUB_NAME
FROM SUBJECTS
WHERE SUB_ID = C.SUB_ID3) AS SUBJECT_NAME3
, (SELECT SUB_NAME
FROM SUBJECTS
WHERE SUB_ID = C.SUB_ID4) AS SUBJECT_NAME4
FROM COMBINATION C;
As you need exactly 4 subjects, the columns-solution is just fine I would say.

Help needed I have a canon 40D. I am thinking of buying a canon 6D.But not sure that my len

Hi all help needed I have a canon 40D. I am thinking of buying a canon 6D.
But not sure that my lenses will work.
I have a 170mm/ 500mm APO Sigma.
A 10/20 ex Sigma HSM IF.
And a 180 APO Sigma Macro or do I have to scrap them and buy others.
ALL Help will be greatly received. Yours BRODIE

In short, I love it. I was going to buy the 5DMark III. After playing with it for a while at my local Fry's store where they put 5DMII, 5DMIII and 6D next to each other, using the same 24-105L lens, I decided to get the 6D and pocket the different for lens later.
I'm upgrading from the 30D. So I think you'll love it. It's a great camera. I have used 5DMII extensively before (borrowing from a close friend).
Funny thing is at first I don't really care about the GPS and Wifi much. I thought they're just marketing-gimmick. But once you have it, it is actually really fun and helpful. For example, I can place the 6D on a long "monopod", then use the app on the phone to control the camera to get some unique perspective on some scenes. It's fun and great. GPS is also nice for travel guy like me.
Weekend Travelers Blog | Eastern Sierra Fall Color Guide

Help needed! Raid degraded again!

Hi!
Help needed! I hava made bootable RAID with two S-ATAII 250Gb HDD and its not working! Every now and then at bootup I get a message RAID -> DEGRADED... Must be seventh time! Rebuild takes its own time!
What am I doing wrong!
T: Ekku
K8N Neo4 Ultra
AMD 64 4200+
2 Gb RAM
2 x 250 Gb HDD (Maxtor)
nVidia RAID (in mb)
P.S. I wery SORRY with my poor language!

I'm going to blame the nVRAID because I've seen issues with it in the past. If your motherboard has another non-nVidia RAID solution, use that instead. Using the nVidia SATA ports as BASE or JBOD is fine and dandy but RAIDing always had issues. It's not even a driver issue I think it's just instability. Latest drivers and even boxed drivers never helped. Granted, some will report success with their rig. But on a professional level I've seen nForce issues on different motherboards and different hard drives that had RAID disaster stories.
Good luck and if you don't have another RAID solution, my suggestion would be to buy a dedicated RAID controller card.
LPB

HELP NEEDED WITH ADDAPTER-DVI TO VGA.

PLEASE ...HELP NEEDED WITH WIRING CROSS OVER....CAN YOU HELP WITH BACK OF PLUG CONNECTIONS...I SORTA UNDERSTAND THE PINOUTS BUT CANT MAKE AN EXACT MACH...WOULD LIKE TO BE 100% SURE...
......THIS ENSURES NO SMOKE!!!
THE CARD IS AN ATI RADEON RX9250-DUAL HEAD-.........ADDAPTER IS DVI(ANALOG)MALE TO VGA(ANALOG)FEMALE.
ANY HELP VERY MUCH APPRECIATED........ SEEMS YOU NEED TO BE ROCKET SCI TO ATTACH A BLOODY PICTURE...SO THIS HAS BEEN BIG WASTE OF FING TIME!

Quote from: BOBHIGH on 17-December-05, 09:21:31
Get over it mate !
I find it easy t read CAPS...and if you dont like it ...DONT READ IT!
And why bother to reply...some people have nothing better to do.
Yes there chep and easy to come by...Ive already got a new one.
All I wanted was to make a diagram of whats inside the bloody thing...it was a simple question and required a simple answer.
NO NEED TO A WANKA !!
I feel a bann comming up.
Have you tryed Google ? really.. your question is inrelevant. No need to reply indeed.
Why do you come here asking this question anyway ? is it becouse you have a MSI gfx card ? and the adapter has nothing to do with this ?
You think you can come in here yelling.. thinking we have to put up with it and accept your style of posting. This is not a MSI tech center.. it's a user to user center.. Your question has nothing to do with MSI relavant things anyway's.
Google = your friend.
Quote from: BOBHIGH on 17-December-05, 09:21:31
it was a simple question and required a simple answer
Simple for who ? you (buying a new one) ? me ? we ? .really...........
Quote from: Dynamike on 16-December-05, 04:11:48
1: There are allot of diffrent types of those adapters.
If any of the mods have a problem about my reply.. please pm me.

Help needed for grouping.

Hi,
    Help needed .
I have an internal table having 6 .
Ex :
f1     f2    f3     f4    f5    f6
a     aa    11    p1 10    10
a     aa    12    p1 20    20
b     aa    11    p2 30    30
b     aa    12    p2 40    30
Now i want to sum the fields f5 and f6 individually and need to display based upon the fields f1 and f4.
To Display :
f1     f2    f3     f4    f5    f6
a     aa    11    p1 30    30.
b     aa    11    p2 70    60.
can anyone help me.How to do this..?
Thanks

Here you go
DATA:
BEGIN OF cur_tab OCCURS 0,
    f1        TYPE c,
    f2(2)     TYPE c,
    f3(2)     TYPE c,
    f4(2)     TYPE c,
    f5(2)     TYPE c,
    f6(2)     TYPE n,
END OF cur_tab.
DATA:
BEGIN OF sum_tab OCCURS 0,
    f1        TYPE c,
    f4(2)     TYPE c,
    f5        TYPE p,
    f6        TYPE p,
END OF sum_tab.
DATA:
BEGIN OF final_tab OCCURS 0,
    f1        TYPE c,
    f2(2)     TYPE c,
    f3(2)     TYPE c,
    f4(2)     TYPE c,
    f5(5)     TYPE c,
    f6(5)     TYPE c,
END OF final_tab.
START-OF-SELECTION.
cur_tab-f1 = 'a'.
cur_tab-f2 = 'aa'.
cur_tab-f3 = '11'.
cur_tab-f4 = 'p1'.
cur_tab-f5 = '10'.
cur_tab-f6 = '10'.
APPEND cur_tab.
cur_tab-f1 = 'a'.
cur_tab-f2 = 'aa'.
cur_tab-f3 = '11'.
cur_tab-f4 = 'p1'.
cur_tab-f5 = '20'.
cur_tab-f6 = '20'.
APPEND cur_tab.
cur_tab-f1 = 'b'.
cur_tab-f2 = 'aa'.
cur_tab-f3 = '11'.
cur_tab-f4 = 'p2'.
cur_tab-f5 = '30'.
cur_tab-f6 = '30'.
APPEND cur_tab.
cur_tab-f1 = 'b'.
cur_tab-f2 = 'aa'.
cur_tab-f3 = '11'.
cur_tab-f4 = 'p2'.
cur_tab-f5 = '40'.
cur_tab-f6 = '30'.
APPEND cur_tab.
LOOP AT cur_tab.
    MOVE-CORRESPONDING cur_tab TO sum_tab.
    COLLECT sum_tab.
ENDLOOP.
LOOP AT sum_tab.
    READ TABLE cur_tab WITH KEY f1 = sum_tab-f1
                                f4 = sum_tab-f4.
    IF sy-subrc NE 0.
      WRITE:/ 'Something went very wrong'.
      CONTINUE.
    ENDIF.
    MOVE-CORRESPONDING cur_tab TO final_tab.
    MOVE-CORRESPONDING sum_tab TO final_tab.
    APPEND final_tab.
ENDLOOP.
LOOP AT final_tab.
    WRITE:/1 final_tab-f1,
          AT 5 final_tab-f2,
          AT 10 final_tab-f3,
          AT 15 final_tab-f4,
          AT 20 final_tab-f5,
          AT 25 final_tab-f6.
ENDLOOP.
and the output
a   aa   11   p1     30   30
b   aa   11   p2     70   60

Help needed on installation of Oracle 9i on Sun Solaris 8

Hey,
Help needed on installation of Oracle 9i EE on Sun Solaris 8. The problem I met was: we followed the installation guide from the documentation. And we selected the choice "install software only". After it was done successfully, we run Database Configuration Assistant utility to create a database instance. But finally it always tried to create the instance at the root directory ( / ) which doesn't have enough space and then failed. The case was that we have set the enviroment parameters: $ORACLE_BASE = /export/mydata, $ORACLE_HOME = /export/apps/oracle9i. That means it should be installed at /export/mydata, but it didn't. Any help or advice are welcome. Thanks.
Simon

I have downloaded Oracle 11G R2 version from Windows and extracted it in Windows and copied it into DVD after extraction in two folders. Now I am mounting that DVD in Solaris 10 installed in my VMware . I made a new directory named as 'installation ' under /export/home/oracle and copied the folders from DVD to 'installation' folder. Now I am entering installation folder and try to do ./runInstaller as 'oracle ' user and getting the error mentioned before.
Edited by: 916438 on Mar 31, 2012 5:55 PM

Help needed on installation of Oracle 9i EE on Sun Solaris 8

Hey,
Help needed on installation of Oracle 9i EE on Sun Solaris 8. The problem I met was: we followed the installation guide from the documentation. And we selected the choice "install software only". After it was done successfully, we run Database Configuration Assistant utility to create a database instance. But finally it always tried to create the instance at the root directory ( / ) which doesn't have enough space and then failed. The case was that we have set the enviroment parameters: $ORACLE_BASE = /export/mydata, $ORACLE_HOME = /export/apps/oracle9i. That means it should be installed at /export/mydata, but it didn't. Any help or advice are welcome. Thanks.
Simon

I have downloaded Oracle 11G R2 version from Windows and extracted it in Windows and copied it into DVD after extraction in two folders. Now I am mounting that DVD in Solaris 10 installed in my VMware . I made a new directory named as 'installation ' under /export/home/oracle and copied the folders from DVD to 'installation' folder. Now I am entering installation folder and try to do ./runInstaller as 'oracle ' user and getting the error mentioned before.
Edited by: 916438 on Mar 31, 2012 5:55 PM

Help needed in Finding Download location for Sun One Portal 7

Hi,
help needed for finding download location for Sun ONE Portal 7. I tried to find in Oracle Download page ,
http://www.oracle.com/us/sun/sun-products-map-075562.html, But unable to find.
Please share the link for download location.
I am totally new in Sun ONE Portal.
Thanks,
Edited by: 945439 on Oct 5, 2012 3:41 AM

try edelivery.oracle.com under sun products.

Help needed in constructing a tree

Help needed in constructing a tree. I was wondering if some one can suggest me how to add messages in the second column for both the parent node and child elements.
I was able to create a tree succefully, but want to add some description in the second column for the first column elements, for both parent and child elements.
Please suggest me how to add the arrays to second column for parent and child nodes.
Solved!
Go to Solution.
Attachments:
Tree_fix.vi ‏15 KB

The Child Text parameter is the one you are searching for. It accepts a 1D string array for the following columns.
hope this helps,
Norbert
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it.

Help needed on CD740 ???

Help needed on CD740 ? My CD740 is GREAT , well , it was great !!? The sound and general performance are wonderful , but , it now has a fault !!? Shock Horror !!
What can it be ?!!? Well , the display illumination has failed , as in , there isn't any !!? Have to use a torch to read it !!? Not good. Now , here's the thing , I want a phone number (UK zone) ?to talk to an actual human and I cannot find one !!? That is soooooo annoying !!? The unit is out of warranty so I want to repair this myself , no worries , I once worked for Philips in their pro studio equipment repair workshop so I know my way around black boxes !! I would like a service manual though so that I can get the case apart without damage. So , can anyone help me with a phone number , pretty please ?!!
Thanx.

I tried compling servlet, but it is raising error
that coul not find package javax.servletWhat I did not mention... you need to add those JARs in the Classpath explicitly. You will find them in %TOMCAT_HOME%\common\lib. You atleast need to add servlet-api.jar to your Classpath. :)

Help Needed - Swing Interview

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