JDialog best practice

I am building a custom JDialog that includes a JPanel so that it's easier for me to customize (I'm using NetBeans). This is my first solo project as a developer so I want to make sure I follow best practice whenever possible. I have two questions in that regard.
1. If I need to pop-up a user interface from my main frame that inlcudes several components (a text area, radio button groups, buttons, etc) is the JDialog my best option? I know that there are built in dialogs that are used for convenience but they aren't satisfactory for what I need from a user input perspective.
2. The dialog I created contains almost as much code as the main JFrame. This JFrame class is becoming quite large to the point that it's hard to keep track of the code. I've thought about creating another class that extends JDialog and placing the code for the dialog in that class. Is that the generally accepted method for resolving this type of issue?
Last note: I prefer to design my GUI using an IDE such as NetBeans so I can focus on the non-aesthetic code. Unfortunately there doesn't seem to be any logical way for me to create a JDialog outside of my main JFrame without having creating a generic class and write the aesthetic related code manually. Anyone using NetBeans have any suggestions? ( excuse me for that part if there is a separate NetBeans forum but I could not find one ).
Thanks

1. Yeah, I believe JDialog is your best choice. If it's quick pop-up question I instantiate the JDialog via JOptionPane, but if it's more complex I instantiate the JDialog directly.
2. That's okay. You can separate the JDialog GUI into a system of objects working together. I usually make sure this system has only one or two points of access (that is, the reference that the main JFrame will have to it to set it visible and stuff) so that the system doesn't complicate the code that accesses it, but instead keeps its complications internal.
3. I always code my GUIs. I hate how visual editors code it =\

Similar Messages

(Swing) Reading fields from other forms - Best practice

Hi All,
I have been learning Java and Swing through NetBeans (quite a cool way to do it). I would like some 'best-practice' advice please. Google and search on this forum are normally my friends, can't find anything relevant for this though. I have created an application that seems to be functional, all my navigation is through tabs.
To make my app portable I have created a ?Settings? part. To save having another tab, I have basically copied the way NetBeans deals with opening the ?About Box? in its example, and have set-up fields in here. This essentially opens a JDialog with fields through an option in the menu.
I figure the best way to store the data is in a simple text file, and have the application read the values on start-up? Then when somebody changes the fields and saves it just overwrites the text file with the new values. I am not sure how to best read these in though, I can?t find a way of reading direct from the JDialog (i.e. var.getText()) which makes sense as the JDialog will be closed.
Will my best practice simply be writing a class which reads the file, then whenever I need a value just calling the class?
Thanks a lot

You should not be using preference files unless you really know what you are doing. This is one area of the very few areas of Java programming that can have lasting nasty negative affects on a computer that runs the code if done wrong.
If you want the user to save preferences it is better to just use xml. The advantage of preference files is they can be used by multiple programs and are permanent even after the program is done running/deleted/writen-over/forgotten. The disadvantages of preference files is they can be used by multiple programs, are permanent even after the program is done running/deleted/writen-over/forgotten, can cause damage to your OS, may be seen as harmfull by add blockers and/or anti-virus software, may lead to conflicts with other software that uses similar naming schemes, and are pretty much unportable.
You are going to be much better off in the long run learning XML and just saving them there, an added benefit of XML is if you screw something up and it causes your program to no longer run you can easily edit the xml by hand.
JSG

Best Practice: Executing the same code from different triggers

Swing supports the idea of Actions, which seems to be an implementation of the "Command" pattern. One can create an instance of an Action implementation and set it to several JComponents, like JButton and JMenuItem. Whenever the button or the menu item is triggered, the action gets executed. So far, so good.
But there are more triggers in Swing that cannot get configured to trigger an action, namely Drops and pressing the window's [X] Close icon. Certainly these fire events, but they do not automatically trigger actions.
Certainly one can react to importData(TransferSupport) and windowClosing() by manually calling the action's actionPerformed(ActionEvent) method, but as there is no setAction(Action) method at neither the TransferHandler class nor the WindowAdapter class, the question is: Where to take that Action instance from, and what command name to pass to it's constructor, and what to provide as the event source?
It just seems like the Action framework has a gap here, as it nicely covers these questions for JComponents, but not for JFrame and JDialog.
So unless there are JFrame.setDropAction(Action) and JFrame.setCloseAction(Action) methods added to the Swing framework (and I doubt they will get added any time near), my question is whether there have been establed some widely accepted best practices (i. e. something that 75% of the programmers will do, not something ONE programmer always does but just he does). Any Swing expert here answering this?

The window decorations are handled by the OS. That [X] close button isn't a JButton at all.
JFrame's and JDialog's, however, do have a root panes. And you can ask the root pane to take over window decorations via JFrame#setDefaultLookAndFeelDecorated(true). JDialog has a similar method. When the root pane takes over window decorations, then the [X] icon is a JButton and you could, in theory, set its action to an Action object.
The the metal LAF window decorations, however, are ugly (I think at least) and I'm not sure how many programs actually use it.

GUI Design Best Practices

Still learning Java and OOP. The question is, what is the best practice method for designing the user interface? For instance, I have a main_GUI that has all the basic stuff and then I need to have 5 or so different displays. A couple of them need to be modal so I'm creating those as jDialog. Is this correct or should you not use those.
Actually, all of the additional screens I want to be modal so I don't see another way of creating a normal jFrame that is modal which is why I'm asking before creating every screen as a jDialog.
Also, I have one screen that could have 3 different functions. Is it acceptable to create the screen with all of the components and just hide the ones that I don't need at any given time or should I actually create 3 different screens that all look roughly the same?
Thanks for any input/advice.

ShosMeister wrote:
So what's the difference, or more importantly, what's wrong with using jFrames? If you are creating a stand-alone, non-web app, then you will of course create a JFrame, and place your app in it, but I'm suggesting that the app not extend JFrame but rather you simply create a JFrame when you need it, and place a JPanel in this JFrame's contentPane, pack it and display it. The reasons for not extending a JFrame are multiple but mostly boil down to a general preference to avoiding extending classes with inheritance and using instead composition. There are many blogs dedicated to discussing this paradigm which can be found with Google, and here are two decent articles from the first page of my search:
[JavaWorld: Inheritance versus composition: Which one should you choose?|http://www.javaworld.com/javaworld/jw-11-1998/jw-11-techniques.html]
[Object Composition vs. Inheritance|http://brighton.ncsa.uiuc.edu/~prajlich/T/node14.html]
One error caused by extension of a Swing class via inheritance that I saw in a recent thread in the Swing forum involved a class that overrode JLabel and held x and y int variables. The class had setX(int i), setY(int i), and getX(), getY() methods and thereby unknowingly overrode JComponents own similar methods completely messing up the JLabels ability to be positioned correctly.
Are you saying I should only have one "window" and swap the data constantly in that window? Nope. I am saying that you should emulate other windows-like programs that you use. Most use a combination of panel swapping, modal and non-modal dialogs, ... whatever works best for the situation. But most importantly, you should write your code so that it is easy to change from one to the other with a minimal change in your code. Aim for flexibility of use.
Would that require that all the jPanels were the same size to be able to display correctly?If you swapped with a CardLayout and created your JPanels to be flexible with sizing, the CardLayout would take care of this mostly for you.
So if I create a main jPanel, set it up with all of the components that I want, when I run the program and main() is called, it would create the jFrame and drop the jPanel into itself? Not sure I've seen any examples of that so I'll have to look that one up. Yes, you'd drop the JPanel into the JFrame's contentPane. There are plenty of examples here, but it may take some digging to find them.
Unless of course I've completely misunderstood you which is possible since, as I've mentioned, I'm just learning Java.I think you are understanding what we suggest here. You are asking the right questions, so I predict that you should learn Java quickly.
Thanks!!!!Welcome!

Logical level in Fact tables - best practice

Hi all,
I am currently working on a complex OBIEE project/solution where I am going straight to the production tables, so the fact (and dimension) tables are pretty complex since I am using more sources in the logical tables to increase performance. Anyway, what I am many times struggling with is the Logical Levels (in Content tab) where the level of each dimension is to be set. In a star schema (one-to-many) this is pretty straight forward and easy to set up, but when the Business Model (and physical model) gets more complex I sometimes struggle with the aggregates - to get them work/appear with different dimensions. (Using the menu "More" - "Get levels" does not allways give the best solution......far from). I have some combinations of left- and right outer join as well, making it even more complicated for the BI server.
For instance - I have about 10-12 different dimensions - should all of them allways be connected to each fact table? Either on Detail or Total level. I can see the use of the logical levels when using aggregate fact tables (on quarter, month etc.), but is it better just to skip the logical level setup when no aggregate tables are used? Sometimes it seems like that is the easiest approach...
Does anyone have a best practice concerning this issue? I have googled for this but I haven't found anything good yet. Any ideas/articles are highly appreciated.

Hi User,
For instance - I have about 10-12 different dimensions - should all of them always be connected to each fact table? Either on Detail or Total level.It not necessary to connect to all dimensions completely based on the report that you are creating ,but as a best practice we should maintain all at Detail level only,when you are mentioning any join conditions in physical layer
for example for the sales table if u want to report at ProductDimension.ProductnameLevel then u should use detail level else total level(at Product,employee level)
Get Levels. (Available only for fact tables) Changes aggregation content. If joins do not exist between fact table sources and dimension table sources (for example, if the same physical table is in both sources), the aggregation content determined by the administration tool will not include the aggregation content of this dimension.
Source admin guide(get level definition)
thanks,
Saichand.v

Best practices for setting up users on a small office network?

Hello,
I am setting up a small office and am wondering what the best practices/steps are to setup/manage the admin, user logins and sharing privileges for the below setup:
Users: 5 users on new iMacs (x3) and upgraded G4s (x2)
Video Editing Suite: Want to connect a new iMac and a Mac Pro, on an open login (multiple users)
All machines are to be able to connect to the network, peripherals and external hard drive. Also, I would like to setup drop boxes as well to easily share files between the computers (I was thinking of using the external harddrive for this).
Thank you,

Hi,
Thanks for your posting.
When you install AD DS in the hub or staging site, disconnect the installed domain controller, and then ship the computer to the remote site, you are disconnecting a viable domain controller from the replication topology.
For more and detail information, please refer to:
Best Practices for Adding Domain Controllers in Remote Sites
http://technet.microsoft.com/en-us/library/cc794962(v=ws.10).aspx
Regards.
Vivian Wang

Add fields in transformations in BI 7 (best practice)?

Hi Experts,
I have a question regarding transformation of data in BI 7.0.
Task:
Add new fields in a second level DSO, based on some manipulation of first level DSO data. In 3.5 we would have used a start routine to manipulate and append the new fields to the structure.
Possible solutions:
1) Add the new fields to first level DSO as well (empty)
- Pro: Simple, easy to understand
- Con: Disc space consuming, performance degrading when writing to first level DSO
2) Use routines in the field mapping
- Pro: Simple
- Con: Hard to performance optimize (we could of course fill an internal table in the start routine and then read from this to get some performance optimization, but the solution would be more complex).
3) Update the fields in the End routine
- Pro: Simple, easy to understand, can be performance optimized
- Con: We need to ensure that the data we need also exists (i.e. if we have one field in DSO 1 that we only use to calculate a field in DSO 2, this would also have to be mapped to DSO 2 in order to exist in the routine).
Does anybody know what is best practice is? Or do you have any experience regarding what you see as the best solution?
Thank you in advance,
Mikael

Hi Mikael.
I like the 3rd option and have used this many many times. In answer to your question:-
Update the fields in the End routine
- Pro: Simple, easy to understand, can be performance optimized - Yes have read and tested this that it works faster. A OSS consulting note is out there indicating the speed of the end routine.
- Con: We need to ensure that the data we need also exists (i.e. if we have one field in DSO 1 that we only use to calculate a field in DSO 2, this would also have to be mapped to DSO 2 in order to exist in the routine). - Yes but by using the result package, the manipulation can be done easily.
Hope it helps.
Thanks,
Pom

Temp Tables - Best Practice

Hello,
I have a customer who uses temp tables all over their application.
This customer is a novice and the app has its roots in VB6. We are converting it to .net
I would really like to know the best practice for using temp tables.
I have seen code like this in the app.
CR2.Database.Tables.Item(1).Location = "tempdb.dbo.[##Scott_xwPaySheetDtlForN]"
That seems to work, though i do not know why the full tempdb.dbo.[## is required.
However, when i use this in the new report I am doing I get runtime errors.
i also tried this
CR2.Database.Tables.Item(1).Location = "##Scott_xwPaySheetDtlForN"
I did not get errors, but I was returned data i did not expect.
Before i delve into different ways to do this, i could use some help with a good pattern to use.
thanks

Hi Scott,
Are you using the RDC still? It's not clear but looks like it.
We had an API that could piggy back the HDBC handle in the RDC ( craxdrt.dll ) but that API is no longer available in .NET. Also, the RDC is not supported in .NET since .NET uses the framework and RDC is COM.
Work around is to copy the temp data into a data set and then set location to the data set. There is no way that I know of to get to the tempdb from .NET. Reason being is there is no CR API to set the owner of the table to the user, MS SQL Server locks the tempdb to that user has exclusinve rights on it.
Thank you
Don

Best Practice for Significant Amounts of Data

This is basically a best-practice/concept question and it spans both Xcelsius & Excel functions:
I am working on a dashboard for the US Military to report on some basic financial transactions that happen on bases around the globe. These transactions fall into four categories, so my aggregation is as follows:
Year,Month,Country,Base,Category (data is Transaction Count and Total Amount)
This is a rather high level of aggregation, and it takes about 20 million transactions and aggregates them into about 6000 rows of data for a two year period.
I would like to allow the users to select a Category and a country and see a chart which summarizes transactions for that country ( X-axis for Month, Y-axis Transaction Count or Amount ). I would like each series on this chart to represent a Base.
My problem is that 6000 rows still appears to be too many rows for an Xcelsius dashboard to handle. I have followed the Concatenated Key approach and used SUMIF to populate a matrix with the data for use in the Chart. This matrix would have Bases for row headings (only those within the selected country) and the Column Headings would be Month. The data would be COUNT. (I also need the same matrix with Dollar Amounts as the data).
In Excel this matrix works fine and seems to be very fast. The problem is with Xcelsius. I have imported the Spreadsheet, but have NOT even created the chart yet and Xcelsius is CHOKING (and crashing). I changed Max Rows to 7000 to accommodate the data. I placed a simple combo box and a grid on the Canvas u2013 BUT NO CHART yet u2013 and the dashboard takes forever to generate and is REALLY slow to react to a simple change in the Combo Box.
So, I guess this brings up a few questions:
1)     Am I doing something wrong and did I miss something that would prevent this problem?
2)     If this is standard Xcelsius behavior, what are the Best Practices to solve the problem?
a.     Do I have to create 50 different Data Ranges in order to improve performance (i.e. Each Country-Category would have a separate range)?
b.     Would it even work if it had that many data ranges in it?
c.     Do you aggregate it as a crosstab (Months as Column headings) and insert that crosstabbed data into Excel.
d.     Other ideas that Iu2019m missing?
FYI: These dashboards will be exported to PDF and distributed. They will not be connected to a server or data source.
Any thoughts or guidance would be appreciated.
Thanks,
David

Hi David,
I would leave your query
"Am I doing something wrong and did I miss something that would prevent this problem?"
to the experts/ gurus out here on this forum.
From my end, you can follow
TOP 10 EXCEL TIPS FOR SUCCESS
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/204c3259-edb2-2b10-4a84-a754c9e1aea8
Please follow the Xcelsius Best Practices at
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/a084a11c-6564-2b10-79ac-cc1eb3f017ac
In order to reduce the size of xlf and swf files follow
http://myxcelsius.com/2009/03/18/reduce-the-size-of-your-xlf-and-swf-files/
Hope this helps to certain extent.
Regards
Nikhil

Best-practice for Catalog Views ? :|

Hello community,
A best practice question:
The situtation: I have several product categories (110), several items in those categories (4000) and 300 end-users. I would like to know which is the best practice for segment the catalog. I mean, some users should only see categories 10,20 & 30. Other users only category 80, etc. The problem is how can I implement this ?
My first idea is:
1. Create 110 Procurement Catalogs (1 for every prod.category). Each catalog should contain only its product category.
2. Assign in my Org Model, in a user-level all the "catalogs" that the user should access.
Do you have any idea in order to improve this ?
Saludos desde Mexico,
Diego

Hi,
Your way of doing will work, but you'll get maintenance issues (to many catalogs, and catalog link to maintain for each user).
The other way is to built your views in CCM, and assign these views to the users, either on the roles (PFCG) or on the user (SU01). The problem is that with CCM 1.0 this is limitated, cause you'll have to assign one by one the items to each view (no dynamic or mass processes), it has been enhanced in CCM 2.0.
My advice:
-Challenge your customer about views, and try to limit the number of views, with for example strategic and non strategic
-With CCM 1.0 stick to the procurement catalogs, or implement BADIs to assign items to the views (I experienced it, it works, but is quite difficult), but with a limitated number of views
Good luck.
Vadim

Best practice on sqlite for games?

Hi Everyone, I'm new to building games/apps, so I apologize if this question is redundant...
I am developing a couple games for Android/iOS, and was initially using a regular (un-encrypted) sqlite database. I need to populate the database with a lot of info for the games, such as levels, store items, etc. Originally, I was creating the database with SQL Manager (Firefox) and then when I install a game on a device, it would copy that pre-populated database to the device. However, if someone was able to access that app's database, they could feasibly add unlimited coins to their account, unlock every level, etc.
So I have a few questions:
First, can someone access that data in an APK/IPA app once downloaded from the app store, or is the method I've been using above secure and good practice?
Second, is the best solution to go with an encrypted database? I know Adobe Air has the built-in support for that, and I have the perfect article on how to create it (Ten tips for building better Adobe AIR applications | Adobe Developer Connection) but I would like the expert community opinion on this.
Now, if the answer is to go with encrypted, that's great - but, in doing so, is it possible to still use the copy function at the beginning or do I need to include all of the script to create the database tables and then populate them with everything? That will be quite a bit of script to handle the initial setup, and if the user was to abandon the app halfway through that population, it might mess things up.
Any thoughts / best practice / recommendations are very appreciated. Thank you!

I'll just post my own reply to this.
What I ended up doing, was creating the script that self-creates the database and then populates the tables (as unencrypted... the encryption portion is commented out until store publishing). It's a tremendous amount of code, completely repetitive with the exception of the values I'm entering, but you can't do an insert loop or multi-line insert statement in AIR's SQLite so the best move is to create everything line by line.
This creates the database, and since it's not encrypted, it can be tested using Firefox's SQLite manager or some other database program. Once you're ready for deployment to the app stores, you simply modify the above set to use encryption instead of the unencrypted method used for testing.
So far this has worked best for me. If anyone needs some example code, let me know and I can post it.

Best Practice Table Creation for Multiple Customers, Weekly/Monthly Sales Data in Multiple Fields

We have an homegrown Access database originally designed in 2000 that now has an SQL back-end. The database has not yet been converted to a higher format such as Access 2007 since at least 2 users are still on Access 2003. It is fine if suggestions
will only work with Access 2007 or higher.
I'm trying to determine if our database is the best place to do this or if we should look at another solution. We have thousands of products each with a single identifier. There are customers who provide us regular sales reporting for what was
sold in a given time period -- weekly, monthly, quarterly, yearly time periods being most important. This reporting may or may not include all of our product identifiers. The reporting is typically based on calendar-defined timing although we have
some customers who have their own calendars which may not align to a calendar month or calendar year so recording the time period can be helpful.
Each customer's sales report can contain anything from 1,000-20,000 rows of products for each report. Each customer report is different and they typically have between 4-30 columns of data for each product; headers are consistently named. The
product identifiers included may vary by customer and even within each report for a customer; the data in the product identifier row changes each week. Headers include a wide variety of data such as overall on hand, overall on order, unsellable on hand,
returns, on hand information for each location or customer grouping, sell-through units information for each location or customer grouping for that given time period, sell-through dollars information for each location or customer grouping for that given time
period, sell-through units information for each location or customer grouping for a cumulative time period (same thing for dollars), warehouse on hands, warehouse on orders, the customer's unique categorization of our product in their system, the customer's
current status code for that product, and so on.
Currently all of this data is stored in a multitude of Excel spreadsheets (by customer, division and time period). Due to overall volume of information and number of Excel sheets, cross-referencing can take considerable time. Is it possible to
set-up tables for our largest customers so I can create queries and pivot tables to more quickly look at sales-related information by category, by specific product(s), by partner, by specific products or categories across partners, by specific products or
categories across specific weeks/months/years, etc. We do have a separate product table so only the product identifier or a junction table may be needed to pull in additional information from the product table with queries. We do need to maintain
the sales reporting information indefinitely.
I welcome any suggestions, best practice or resources (books, web, etc).
Many thanks!

Currently all of this data is stored in a multitude of Excel spreadsheets (by customer, division and time period). Due to overall volume of information and number of Excel sheets, cross-referencing can take considerable time. Is it possible to
set-up tables .....
I assume you want to migrate to SQL Server.
Your best course of action is to hire a professional database designer for a short period like a month.
Once you have the database, you need to hire a professional DBA to move your current data from Access & Excel into the new SQL Server database.
Finally you have to hire an SSRS professional to design reports for your company.
It is also beneficial if the above professionals train your staff while building the new RDBMS.
Certain senior SQL Server professionals may be able to do all 3 functions in one person: db design, database administration/ETL & business intelligence development (reports).
Kalman Toth Database & OLAP Architect
SELECT Video Tutorials 4 Hours
New Book / Kindle: Exam 70-461 Bootcamp: Querying Microsoft SQL Server 2012

Best Practice to fetch SQL Server data and Insert into Oracle Tables

Hello,
I want to read sqlserver data everry half an hour and write into oracle tables ( in two different databases). What is the best practice for doing this?
We do not have any database dblinks from oracle to sqlserver and vice versa.
Any help is highly appreciable?
Thanks

Well, that's easy:
use a TimerTask to do the following every half an hour:
- open a connection to sql server
- open two connections to the oracle databases
- for each row you read from the sql server, do the inserts into the oracle databases
- commit
- close all connections

Best Practice for Image placement and Anchored Frames for use in Robohelp 9

Hi,
I'm looking for the best practices in how to layout my images in Framemaker 10 so that they translate correctly to Robohelp 9. I currently have images inside of Anchored frames that "Run into" the right side of my text. I've adjusted the size of the anchored frame so that my text flows correctly around the image. Everything looks good in Framemaker! Yeah! The problem is that when I link my Framemaker document to Robohelp, the text does not flow around my image in the same manner. On a couple of Robohelp screens the image is running into the footer. I'm wondering if I should be using tables in Framemaker in order to get the page layout that I'm looking for. Also, I went back and forth...is this a Framemaker question or is this a Robohelp question. Any assistance would be greatly appreciated.

I think Jeff is meaning this section of the RoboHelp forums:
http://forums.adobe.com/community/robohelp/robohelp_framemaker

Best practice for a same query against 2 different tables

Hello all,
I want to extract info about tablespaces storage, both permanent and temporary. For that I use 2 different cursors that do exactly the same query but against a different table (dba_data_files and dba_temp_files).
CURSOR permanentTBSStorageInfo (tablespaceName VARCHAR2) IS
SELECT file_name, bytes, autoextensible, maxbytes, increment_by
FROM dba_data_files
WHERE tablespace_name = tablespaceName;
CURSOR temporaryTBSStorageInfo (tablespaceName VARCHAR2) IS
SELECT file_name, bytes, autoextensible, maxbytes, increment_by
FROM dba_temp_files
WHERE tablespace_name = tablespaceName;
First I'm bothered that I have to use 2 cursors to execute the same query against 2 different tables. Is there no another way around?
Then I fetch the results of this cursors in 2 different loops because I didn't find a way to dynamically call the cursors. I am looking for best practice here, knowing that I will do the same parsing against the results of the 2 cursors.
Thank you,

Hi
Check whether the below query is helpful or not
select      fs.tablespace_name "Tablespace",
     fs.tempspace "Temp MB",
     df.totalspace "Total MB"
     from
     (select
     tablespace_name,
     round(sum(bytes) / 1048576) TotalSpace
     from
     dba_data_files
     group by
     tablespace_name
     ) df,
     (select
     tablespace_name,
     round(sum(bytes) / 1048576) tempSpace
     from
     dba_temp_files
     group by
     tablespace_name
     ) fs
     where
     df.tablespace_name = fs.tablespace_name;
Thanks

JDialog best practice

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