A question about primary study

I have the frame1 and a button in it ,i want to click the button to show the frame2.
How can show the frame2,which method shall I invoke.

Yeah...as Ikeda says,
the class that extends Frame (called say, Frame2) needs to be instantiated in the actionPerformed method that gets invoked when the button is pressed.
public void actionPerformed(ActionEvent ae)
Frame2 f2 = new Frame2();
// This should invoke the Frame2 constructor and create a frame and also set the visibility to true.
// Once this is done, the above statement should automatically display the other frame.
- Sundari.

Similar Messages

Question about primary file

When we create a contributor data file primary file i.e. default.xml is empty. From the contribution mode the changes which are made when saved gets reflected in XML. Any idea on which service is being called to update the default.xml file?
Consider the following scenario ... we have a hcsp form with custom meta data fields and a text area field.
The primary file field is hidden and am using sitestudio variables to check in default.xml file.
When the data is entered and upon submission i am calling check in service. Is there a way to store the textArea content in the default.xml file?

Hi ,
Can you elaborate on what exactly is the requirement which you are looking at .
Thanks
Srinath

Question about Primary Key

HI
I'm going to build a Database to automate center in my university
The Database version is Oracle 10g v2
Which data type of primary key should I user?
I used number in past but I heard there is more efficient data type for this purpose
Thanks

BINARY_FLOAT and BINARY_DOUBLE are designed to store floating point numbers. If you are generating synthetic primary keys using a sequence, you are generating integers. It makes no sense from a data modeling perspective to store integer data in floating point fields. And it is exceptionally dangerous if a value gets rounded unexpectedly (floating point numbers lose precision for the trailing bits)
You'll have to clarify for me what "more helpful for indexing" means. As far as storage space goes, there may be some space savings using a BINARY_FLOAT or BINARY_DOUBLE if you have very large primary key values, but there will be a space penalty for most "normal" sequence-generated values, i.e.
SQL> create table x (
2    col1 number,
3    col2 binary_float,
4    col3 binary_double
5 );
Table created.
SQL> insert into x values( 1, 2, 3 );
1 row created.
SQL> select length(col1), length(col2), length(col3) from x;
LENGTH(COL1) LENGTH(COL2) LENGTH(COL3)
           1            8            8
SQL> insert into x values (1e20, 1e20, 1e20 );
1 row created.
SQL> select length(col1), length(col2), length(col3) from x;
LENGTH(COL1) LENGTH(COL2) LENGTH(COL3)
           1            8            8
          21           15            8
SQL> select * from x;
      COL1       COL2       COL3
         1   2.0E+000   3.0E+000
1.0000E+20   1.0E+020   1.0E+020So it takes 8 times the storage to store a 1 in a BINARY_FLOAT or BINARY_DOUBLE than it does to store that in a NUMBER column. But it takes less space if you're storing values like 1e20 (a 1 with 20 0's). If you're storing values large enough to get the space benefit, however, you're going to have rounding issues that will cause the application not to function as you'd expect which is presumably a much greater problem than a bit of wasted disk space.
Justin

Questions about Mapping GL Accounts to Group Accounts

Hi,
I have some questions about mapping gl accounts to group accounts while configuring OBIEE APPS 7.9.6.3 with EBS R12 as a source:
FIRST QUESTION.-
For file file_group_acct_codes_ora.csv, I have the following accounts from my customer:
101101 - Caja Administrativa
101102 - Fondo Revolvente
101103 - Caja de Cambios
101104 - Efectivo en cajero
This group of accounts is named CASH, now my customer said that this group begins in 101101 and ends in 101199 but in this moment only have this 4 accounts in GL, the rest of the accounts, I mean 101105-101199 are not used right now, they are gonna used in the future.
So, my question is, in file_group_acct_codes_ora.csv how I need to put this group:
In this way:
CHART OF ACCOUNTS ID,FROM ACCT,TO ACCT,GROUP_ACCT_NUM
50308,101101,101104,CASH
Or in this way:
CHART OF ACCOUNTS ID,FROM ACCT,TO ACCT,GROUP_ACCT_NUM
50308,101101,101199,CASH
I mean, is there any problem if I use the second way, or is necessary to do it in the first way, and why?
SECOND QUESTION.-
For file file_group_acct_names.csv, when I update with a new group of accounts, is there any rule or size boundary for GROUP_ACCOUNT_NAME?
THIRD QUESTION.-
For file_group_acct_names.csv, what is the value in column LANGUAGE? I mean, is EBS language?, DB language?, server language?
I hope that someone can help me, because I need to clarify this and don't do the first full load and this load ends with error because of this.
Regards,
Arnulfo

I'll take some broad swipes at this and let the smarter people come fill in the details.
We have a true 1:1 setup in our office and have moved to PHDs as a means of protecting against downtime. The thinking is that we will have a spare machine lying around with our base installation ready to go. If a user's machine fails we'll replace it with the spare machine, let it sync the user directory from the server, and we're back in business. It's no substitute for a real backup system, but it potentially avoids having to run a restore from your backups. It also reduces network traffic compared to plain networked homes, and still lets your users work if the server goes down, but provides the benefits of centralized management. John DeTroye wrote a nice article about this.
If you've already got data on your "client" Mac you will need to move it onto the server. PHDs will download data from the server to the client on the first sync, but will not upload a complete home directory from the client to an empty directory on the server. You'll find some posts in this forum discussing how people have gone about migrating data prior to that first sync.
WGM allows you to establish exclusions for stuff you don't want to sync.
One thing to watch out for in the scenario you describe is the so-called "rabbit effect." Assume Bob uses Mac1 as his primary machine. If one day he logs into Mac2 his home directory will be downloaded to Mac2. Once he returns to Mac1 he'll still be cluttering up Mac2 with his data. If he logs into Mac3 the next day and Tom and Sue are also periodically logging into different machines, you can see how you'll end up with a mess pretty quickly.
Hope this helps.

Question about broker Switchover command

Hi guys
i have one question about switchover cmd . For example, i have 1 primary database called stdby3 and 2 standby databases that are called stdby1 and stdby2. When i performed switchover cmd to stdby2 standby database, why the old primary database stdby3 could not become new standby database after i performed a switchover; furthermore the new primary and standby databases are not opened after the switchover process is completed
output screen:
DGMGRL> show configuration;
Configuration
Name: stdby1
Enabled: YES
Protection Mode: MaxProtection
Databases:
stdby3 - Primary database
stdby1 - Physical standby database
stdby2 - Physical standby database
Fast-Start Failover: DISABLED
Current status for "stdby1":
SUCCESS
DGMGRL> SWITCHOVER TO stdby2
Performing switchover NOW, please wait...
Operation requires shutdown of instance "stdby3" on database "stdby3"
Shutting down instance "stdby3"...
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
Operation requires shutdown of instance "stdby2" on database "stdby2"
Shutting down instance "stdby2"...
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
Operation requires startup of instance "stdby3" on database "stdby3"
Starting instance "stdby3"...
Unable to connect to database
ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
Failed.
You are no longer connected to ORACLE
Please connect again.
Unable to start instance "stdby3"
You must start instance "stdby3" manually
Operation requires startup of instance "stdby2" on database "stdby2"
You must start instance "stdby2" manually
Switchover succeeded, new primary is "stdby2"
DGMGRL> show configuration;
Error:
ORA-01034: ORACLE not available
Process ID: 0
Session ID: 130 Serial number: 45
DGMGRL> exit;
oracle@localhost ~$ dgmgrl
DGMGRL for Linux: Version 11.1.0.6.0 - Production
Copyright (c) 2000, 2005, Oracle. All rights reserved.
Welcome to DGMGRL, type "help" for information.
DGMGRL> connect sys
Password:
Connected.
DGMGRL> show configuration;
Error:
ORA-01034: ORACLE not available
Process ID: 0
Session ID: 0 Serial number: 0
DGMGRL> connect sys@stdby3
Password:
Connected.
DGMGRL> show configuration;
Error:
ORA-01034: ORACLE not available
Process ID: 0
Session ID: 0 Serial number: 0
DGMGRL>
Edited by: user6981287 on Jan 6, 2010 9:27 AM

this is my configuration
DGMGRL> show configuration
Configuration
Name: matrix
Enabled: YES
Protection Mode: MaxPerformance
Databases:
stdby1 - Primary database
stdby2 - Physical standby database
stdby3 - Physical standby database
Fast-Start Failover: DISABLED
Current status for "matrix":
SUCCESS
--- this is my first successful switchover -----
DGMGRL> switchover to stdby2
Performing switchover NOW, please wait...
New primary database "stdby2" is opening...
Operation requires shutdown of instance "stdby1" on database "stdby1"
Shutting down instance "stdby1"...
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
Operation requires startup of instance "stdby1" on database "stdby1"
Starting instance "stdby1"...
ORACLE instance started.
Database mounted.
Switchover succeeded, new primary is "stdby2"
-------------------this is my second switchover -------------
DGMGRL> switchover to stdby1
Performing switchover NOW, please wait...
New primary database "stdby1" is opening...
Operation requires shutdown of instance "stdby2" on database "stdby2"
Shutting down instance "stdby2"...
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
Operation requires startup of instance "stdby2" on database "stdby2"
Starting instance "stdby2"...
Unable to connect to database
ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
Failed.
You are no longer connected to ORACLE
Please connect again.
Unable to start instance "stdby2"
You must start instance "stdby2" manually
Switchover succeeded, new primary is "stdby1"
DGMGRL>
Edited by: user6981287 on Jan 7, 2010 12:57 AM
Edited by: user6981287 on Jan 7, 2010 1:00 AM

Question About Photo Printers

Excuse me for asking a question about photo printers here, but I could not find a place in the Apple Discussions form for printers.
I'm thinking about buying an Epson R1900 printer since my primary selection criteria is the quality of glossy photographs.
However, I have been told that use of the R1900 for general purposes (with a "standard" printer setting and non-photo paper) will detract from the R1900's performance when it will be used for printing photos (with photo RPM printer settings on premium photo paper or other media). But I just do not know whether this is correct. I was planning to have only one printer and expecting to use the photo printer as my "general purpose" printer (text, documents etc.).
I would appreciate receiving advice/guidance from people who know about printers and/or people having with experience with the Epson R1900.
Thanks for your help.

I use my photo printer in two ways.
For high quality prints I use the manufacturers Glossy paper and their expensive archival Quality inks for excellent results. More commonly though, I change out those ink cartridges and replace them with a cheaper water soluble ink bought online and use normal A4 copy paper for printing web pages and PDF documents.
This second practice is about 60% cheaper in ink and copy paper is only about 1 cent per sheet and is satisfactory for such documents.
The disadvantage is that is does require physically replacing one set of ink cartridges for the other, also if moving from basic to quality, I also do the inkhead alignment tests and adjustments to ensure that the output for glossy photos is going to be first rate.
I find this necessary to prevent waste of good pigments, yet it still allows the printer to be used for more mundane usage of printing documents. The cost of printers is heavily discounted, as the manufacturers recoup their cost from the sale of ink. Hence one needs to have this dual usage in place to get the best of both worlds.
This advice is not specific to one model photo printer, rather it is a general approach developed after spending too much money on good ink, printing web pages.

Questions about PDF exporting with InDe CS5.5

Hey all,
A couple questions about exporting to PDF from the latest version of InDe.
First, I have noticed that it seems to take a lot longer to get to a PDF. Any suggestions for how to speed up the process? It took 8 minutes or so to generate a low-res PDF (for print) of a 24pp document with a few placed images and vector graphics. Wow, that's a long time to wait, especially for a proof.
Second, the background task... if I get it going on making that 8-minute PDF and then work some more on the document, what exactly is in the PDF? Usually I save before making a PDF or printing. So, is the last version saved what will be in the PDF?
(As an aside, this ability to work on the doc while generating a PDF seems kind of weird. Generally one makes a PDF for proofing, or even for printing, when all the changes have been made and everything is "final". So, I see no benefit to being able to work on my document while it's making a PDF, as I'm probably finished making revisions for the time being. I have to say that I kind of like the progress bar you get when you make an interactive PDF, as you know you can't work on the document when that's on the screen... )
Thanks as always.

First, I have noticed that it seems to take a lot longer to get to a PDF. Any suggestions for how to speed up the process? It took 8 minutes or so to generate a low-res PDF (for print) of a 24pp document with a few placed images and vector graphics. Wow, that's a long time to wait, especially for a proof.
Yes, this is abnormally long (and too long), something is wrong. What's the full version of InDesign you are running, as reported by holding down Cmd or Control and selecting About InDesign?
Second, the background task... if I get it going on making that 8-minute PDF and then work some more on the document, what exactly is in the PDF? Usually I save before making a PDF or printing. So, is the last version saved what will be in the PDF?
Saving is not related. InDesign makes a database snapshot of your document the moment you begin the PDF export, and makes the export relative to that snapshot, regardless of edits you continue to make during the export process, and regardless of saving. Of course saving first is a good idea, for several reasons, not the least of which it sounds like something's fairly seriously wrong with your document or your InDesign installation.
We recommend you trash your preferences and export your document to IDML and see if either of those things changes this 8-minute behavior...err, assuming you're running 7.5.2.318.
(As an aside, this ability to work on the doc while generating a PDF seems kind of weird. Generally one makes a PDF for proofing, or even for printing, when all the changes have been made and everything is "final". So, I see no benefit to being able to work on my document while it's making a PDF, as I'm probably finished making revisions for the time being. I have to say that I kind of like the progress bar you get when you make an interactive PDF, as you know you can't work on the document when that's on the screen... )
Yeah, I think the primary benefit is if you are likely to work on 2 or more files in parallel, so you can finish A and export A and then switch to B. If you'd like a dialog box to pop up when export is done, check out my exportPop script from this post: ANN: automatic dialog after background export (exportPop.jsx.

Question about swapping SIM cards on a Z10

Hi, everyone, I am a non-Blackberry user who works in IT support. One of my clients uses a Blackberry and has often asked me very complicated questions about how to do various unusual things with his device. At the present time, he is considering switching to a Z10, which would be set up using ActiveSync. He wants to know if he could swap the SIM card without having to go through the setup process again. My client travels a lot, and wants to use a local SIM card on an upcoming trip to a very remote area.
I've not been able to find an answer to this anywhere.
This is his exact question: "I just got it from a friend (ATT version) and I am trying to see if I like it enough to switch to it as my primary phone. Blackberry z10 asks you to sign in with your blackberry world ID when you first set up the phone. Question: Would you have to do it again if you put a different simm into it? With iPhone, it makes no difference so long as the device is unlocked—you can then exchange simm cards as often as you want. Would it be the same with an unlocked blackberry z10 (I know it's not possible with the bold 9900 as System 7 ties your ID to the simm card). In short, in blackberry z10, could you exchange the US simm for another country's simm without having to wipe the phone, etc. "
If anyone can shed some light on this for me, I'd be very grateful., Thanks!

Hi and Welcome to the Community!
The key issues are thus:
Ensuring that the device is truly carrier unlocked
Ensuring that the specific device model is compatible with the radio frequencies/technologies that the desired carrier uses. There are 4 different Z10 models:
http://www.bbin.in/en/2013/03/03/4-types-blackberry-z10-models-fits-better/?utm_campaign=4-types-of-...
If both of those are OK (separate research of the desired carriers would of course be necessary), then it is indeed a simple matter to change carriers. For example, I changed from ATT to TMO by simply changing the SIM...no need to WIPE or anything, and my same BBID came along just fine. You should, however, always obtain a properly-sized SIM card from the carrier -- there are plenty of reports of folks trying to use "cut" SIM cards and experiencing errors.
With BB10, it's actually simpler than with legacy BBs. Legacy BBs used the BIS service, which required receipt onto the device (from the carrier data network) of Service Books so as to activate the various services that the user subscribed to. When changing carriers, it often could be that a latent Service Book from the prior carrier causes issues when shifting to a different carrier...and that's where WIPING and such came into play, so as to cleanse the device so that the new carrier could deliver all of the proper Service Books to the device. With BB10, there is no BIS, and there are no Service Books...so all of that complication is eliminated.
But, as always, YMMV.
Good luck!
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.
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Question about import database pk, fk

Hi
I want to ask a question about imported database. I imported database and I noticed tables doesnt have Primary key or foreign key. They havent relation between eachs. Why can this occured ?
is it about import or another something?

yeah ı am surprised none of tables have pk or fk ..
but ı want to show you http://i51.tinypic.com/2hedc9d.jpg
what is blue shapes in there ?
can be foerign keys ?

Questions about Access Manager tutorials available in netbeans site

Hi
Thank you for reading my post
I have some questions about two tutoral which i find in :
http://www.netbeans.org/kb/55/amsecurity.html and
http://www.netbeans.org/kb/55/amsecurity-liberty.html
here is my problem :
we have some web services, now we want to have authentication applied for consumer who try to access our web services.
we need to have most possible flexibility because we may deploy the server for a customer with an already established Identity database ( Database Table with user details)
Also we need to have Transport level security using SSL.
I read and studied both of them and now i have some questions :
-I think Securing Web Services Using the SAML or UserNameToken is what we need for authentication and autorization of web service consumers?
is that right?
-Does Sun Java System Access Manager provide flexibility to authenticate user/password with a database table content?
-How we can apply roles in Sun Java System Access Manager when we authenticate users ?
Thanks

Imagine that we want to have an end to end security for our web services
we thought that we could use message level encryption to protect the soap message and also we should protect our web services from un-authenticated acess,
we will use userName token for this.
Our customer has large database which contains many user/password and role of those users.
some of web services should be available to higher role (manager) and not for all users.
so we should check a user role before we allows him/her to access a web service.
my question is whether Sun Access manager can help us with this? or there are other configuration or packages that we should apply to have this feature.
to explain more :
our client side is a swing application, users enter username/password to login into system. after they loged in, we send user/pass every time user want to request some data from some services. (is it good to send user/pass every time?)
We want Sun Access Manager to handle users authentication .
We also need to handle role related authorization, can Sun access manager handle this?
Thanks

A question about foreign key to multiple tables

Hello everybody,
I have a question about creating foreign key and I would appreciate if you could kindly give me a hand. Here are my tables:
CREATE TABLE TEAM1(team_id VARCHAR2(20), project_id VARCHAR2(20));
ALTER TABLE TEAM1 ADD CONSTRAINT PK_TEAM1 PRIMARY KEY(team_id);
CREATE TABLE TEAM2(team_id VARCHAR2(20), project_id VARCHAR2(20));
ALTER TABLE TEAM2 ADD CONSTRAINT PK_TEAM2 PRIMARY KEY(team_id);although the structure of both the tables is exactly the same, the values (in particular team_id) in both tables are different.
Also I have another table named AGENT
CREATE TABLE AGENT(agent_id VARCHAR2(20), team_id VARCHAR2(20));
ALTER TABLE AGENT ADD CONSTRAINT PK_AGENT PRIMARY KEY(agent_id)Now the problem is that the column team_id in AGENT table is actually a foreign key, but the value can be in either TEAM1 or TEAM2. As far as I know a foreign key points only to one table.
How can I deal with this problem? Whenever there is an INSERT or UPDATE I have to make sure that the value of the column "team_id" in the table "AGENT" is a valid value either in "TEAM1" or "TEAM2"
Thanks in advance,
Kind Regards,
Dariyoosh

Do you have the ability to change the data model? If so a more appropriate structure may be something like this:
CREATE TABLE TEAM(team_id VARCHAR2(20), team_name VARCHAR2(20));
ALTER TABLE TEAM ADD CONSTRAINT PK_TEAM PRIMARY KEY(team_id);
ALTER TABLE TEAM ADD CONSTRAINT UK_TEAM UNIQUE (team_name);
CREATE TABLE TEAM_PROJECT(team_id VARCHAR2(20), project_id VARCHAR2(20));
ALTER TABLE TEAM ADD CONSTRAINT PK_TEAM_PROJECT PRIMARY KEY(team_id, project_id);
ALTER TABLE AGENT ADD CONSTRAINT FK_TEAM_PROJECT1 FOREIGN KEY (team_id) REFERENCES TEAM(team_id);
CREATE TABLE AGENT(agent_id VARCHAR2(20), team_id VARCHAR2(20));
ALTER TABLE AGENT ADD CONSTRAINT PK_AGENT PRIMARY KEY(agent_id);
ALTER TABLE AGENT ADD CONSTRAINT FK_TEAM FOREIGN KEY (team_id) REFERENCES TEAM(team_id);Edited by: Centinul on Jun 25, 2010 10:50 AM

Question about searching

Hi all,
I'm considering Oracle BDBJE for a project that stores visited url's (data) based on a key of ip-address (4 bytes) combined with a date (long) to make the keys unique.
If want to search on date (ignore ip) do I have to make a secondary database that has the date of the visited url's as primary index?
Does a method like Cursor.getSearchKeyRange, if supplied with partial key, always search a the beginning of the key? Or could I use it to search for a date by only supplying the date-part of the key? Prop. in this case the bytes for the date will be mistaken for the bytes of the ip-address that comes first in the key.
Thanks for any help.
regards,
Jeroen

Hi Jeroen,
I'm not sure I have all of your data model yet, but I think you've given us enough for me to say you should likely try one or possibly two secondary databases.
If you have not already done so you should review the documentation on Secondary Indexes as found here:
http://www.oracle.com/technology/documentation/berkeley-db/je/GettingStartedGuide/indexes.html
Inserting/Modifying records is faster without using a secondary index. But the queries that you have identified would perform better with secondary indexes. But you should experiment with a few different approaches and compare that with your performance goals.
Also, if you have not already thought about this, I would consider using DPL to implement this, especially since you will be evaluating alternative database designs. You will find that the implementation time is faster and you can also make changes quickly.
http://www.oracle.com/technology/documentation/berkeley-db/je/PersistenceAPI/BerkeleyDB-JE-Persistence-GSG.pdf
You know your data best, but based on the info you provided here are my thoughts/alternatives:
Primary Database key = IP/Date or Maybe Date/IP is better if the Secondary for IP address exists
data = URL plus other data not sure what
Secondary Database Key = URL (I left out date because you said it is not likely that the same URL will exist for multiple dates).
Possible Secondary Database Key = IP address (Which URL's were visited by IP X).
Again, I think you may want to try out something like this a model your inserts and also your query performance. Feel free to post further questions about any results you are getting as you move forward.
Also, if you have not already seen this I would keep this URL handy and consult with it before you post:
http://www.oracle.com/technology/products/berkeley-db/faq/je_faq.html
I hope this helps!
Ron

Questions about a MasterQuize program

Hi, everyone.
I got a in-class case study program like this in the class:
* This class stores/represents a question that has one of two
* answers: True or False.
* 
* It needs to track the following information:
* <ul>
* <li>Question text</li>
* <li>Correct answer</li>
* <li>The user's answer to the question</li>
* <li>Points value</li>
* <li>Category</li>
* <li>Difficulty rating</li>
* </ul>
// Our question should allow us to do the following:
// - Create question (constructor) -- may be overloaded
// - Print (display) question
// - Check client's answer for correctness
// - Get points value for question (0 or max)
// - Add "No-BS" grading option
// - Getting client's answer
// - Check to see if answered by client
public class TrueFalseQuestion
 // Class constants (to simplify changes to common values)
 public static final int MIN_DIFFICULTY_LEVEL = 1;
 public static final int MAX_DIFFICULTY_LEVEL = 5;
 public static final int DEFAULT_DIFFICULTY_LEVEL = 1;
 public static final int DEFAULT_POINT_VALUE = 1;
 public static final String DEFAULT_CATEGORY_VALUE = "none";
 // Class instance variables
 private String questionText;
 private String correctAnswer;
 private String userAnswer;
 private int pointsValue;
 private String category;
 private int difficultyLevel; // TODO: Set a range for difficulty levels
 * @param text The literal wording of this question
 * @param answer The correct answer for this question
 * @param pts The total points available for this question
 * @param ctgry Category keyword for this question
 * @param level The perceived/intended difficulty level of this question
 * 
 * Defines a TrueFalseQuestion object.
 public TrueFalseQuestion (String text, String answer, int pts, String ctgry, int level)
 // Set starting values for all instance variables
 questionText = text.trim();
 correctAnswer = answer.trim();
 userAnswer = null; // No user answer supplied yet
 if (pts >= 1) // We assume that every problem is worth at least 1 point
 pointsValue = pts;
 else
 pointsValue = DEFAULT_POINT_VALUE;
 category = ctgry.trim();
 if (level >= MIN_DIFFICULTY_LEVEL && level <= MAX_DIFFICULTY_LEVEL) // within range
 difficultyLevel = level;
 else
 difficultyLevel = DEFAULT_DIFFICULTY_LEVEL;
 // Simplified (overloaded) constructors
 * @param text The literal wording of this question
 * @param answer The correct answer for this question
 * @param pts The total points available for this question
 * 
 * Defines a TrueFalseQuestion with default values for category and difficulty level.
 public TrueFalseQuestion (String text, String answer, int pts)
 // Call pre-existing constructor with default category and difficulty
 this(text, answer, pts, DEFAULT_CATEGORY_VALUE, DEFAULT_DIFFICULTY_LEVEL);
 * @param text The literal wording of this question
 * @param answer The correct answer for this question
 * 
 * Defines a TrueFalseQuestion with the default point value, default category,
 * and default difficulty level.
 public TrueFalseQuestion (String text, String answer)
 // Call pre-existing constructor with default points, category and difficulty
 this(text, answer, DEFAULT_POINT_VALUE, DEFAULT_CATEGORY_VALUE,
 DEFAULT_DIFFICULTY_LEVEL);
 * @param text The literal wording of this question
 * @param answer The correct answer for this question
 * @param pts The total points available for this question
 * @param ctgry Category keyword for this question
 * 
 * Defines a TrueFalseQuestion with the default difficulty level.
 public TrueFalseQuestion (String text, String answer, int pts, String ctgry)
 // Call pre-existing constructor with default points, category and difficulty
 this(text, answer, pts, ctgry,
 DEFAULT_DIFFICULTY_LEVEL);
 * @param text The literal wording of this question
 * @param answer The correct answer for this question
 * @param ctgry Category keyword for this question
 * 
 * Defines a TrueFalseQuestion with the default point value and the default
 * difficulty level.
 public TrueFalseQuestion (String text, String answer, String ctgry)
 // Use default points and difficulty
 this(text, answer, DEFAULT_POINT_VALUE, ctgry, DEFAULT_DIFFICULTY_LEVEL);
 * @param text The literal wording of this question
 * @param answer The correct answer for this question
 * @param pts The total points available for this question
 * @param level The perceived/intended difficulty level of this question
 * 
 * Defines a TrueFalseQuestion with the default value for the question category.
 public TrueFalseQuestion (String text, String answer, int pts, int level)
 // Use default category
 this(text, answer, pts, DEFAULT_CATEGORY_VALUE, level);
 // Clients can invoke this method to retrieve the text of the current question.
 // We chose to return the text instead of printing it; this allows the client
 // to decide how it should be presented (via a GUI, over a network, etc.)
 public String getQuestion ()
 return questionText;
 // This method allows the client to store the user's answer inside the
 // TrueFalseQuestion object for easy comparison
 public void submitAnswer (String ans)
 userAnswer = ans;
 // This method reports whether the submitted answer matches the correct answer
 public boolean answerIsCorrect(String userAns) // This version does all the work
 if (userAns == null) // No response from user (yet)
 return false;
 else
 // Normalize and compare answers
 char key = normalize(correctAnswer); // Get 't' or 'f'
 char ans = normalize(userAns); // Get 't' or 'f'
 return (key == ans);
 public boolean answerIsCorrect ()
 return answerIsCorrect(userAnswer); // Call previously-defined version
 public int getPointsValue()
 return pointsValue;
 // Return the points awarded for the user's answer. This method does
 // NOT support partial credit; answers are either correct or incorrect.
 // If the "No-BS" option is selected, blank (unanswered) questions receive
 // 1 point automatically; otherwise, the score will be either 0 or the
 // question's normal points value.
 public int getPointsEarned(boolean useNoBSRule)
System.out.println("useNoBS: " + useNoBSRule + "\tuserAnswer: " + userAnswer + "\tcorrectAnswer: " + correctAnswer);
 if (useNoBSRule && (userAnswer == null))
 return 1;
 else if (userAnswer == null)
 return 0; // Without "No-BS", treat blank problems as incorrect
 if (answerIsCorrect() == false)
 return 0;
 else
 return pointsValue;
 // This method returns true if the user has submitted an answer
 // for this question (regardless of whether that answer is correct)
 public boolean hasBeenAnswered ()
 return (userAnswer != null);
 // Private helper method to convert all answers to single lowercase
 // letters (in this case, 't' for TRUE and 'f' for FALSE)
 private char normalize (String input)
 if (input != null)
 input = input.trim(); // Remove leading whitespace
 input = input.toLowerCase();
 return input.charAt(0);
 else
 return ' ';
import java.util.*;
* This class represents a complete test or quiz.
* Data stored:
* - List of questions
* - Total score earned
* - Total score possible
* - Name/title of test
* - Instructions
* - Category/class assignment
* - Student (test-taker) name
* - Date test is/was taken
* - Time started
* - Time completed
* - Maximum time allotted
* - (List of) Maximum attempts per question
* - List of attempts per question
* - List of difficulty ratings per question
* - Assignment weight
* Methods:
* - Constructor
* - Add question
* - Display question
* - Display test
* - Display instructions
* - Generate random exam
* - Take/administer test
* - Get score
* STUFF TO DO:
* - Add time/date restrictions
* - Add network access restrictions
* - Add other restrictions/allowances?
* @author (your name)
* @version (a version number or a date)
public class Test
 // Class constant
 public static final int MAX_NUMBER_OF_QUESTIONS = 10;
 // Class instance variables
 private String testName;
 private int scoreEarned; // What the student earned on the exam
 private int scorePossible; // Total point values of all questions
 private String instructions; // Exam header text
 private ArrayList<TrueFalseQuestion> questions; // Create inside constructor
 // Methods
 public Test (String name, String instr)
 testName = name;
 scoreEarned = 0;
 scorePossible = 0;
 instructions = instr;
 questions = new ArrayList<TrueFalseQuestion>(); //[MAX_NUMBER_OF_QUESTIONS];
 public String getInstructions()
 return instructions;
 public int getScore()
 return scoreEarned;
 public void addQuestion (TrueFalseQuestion q)
 scorePossible += q.getPointsValue();
 questions.add(q); // Automatically append question to end of test
 public String displayQuestion (int position)
 if (position < questions.size())
 return (position+1) + ". " + questions.get(position).getQuestion();
 else
 return null;
 public String displayTest ()
 String result = "";
 for (int i = 0; i < questions.size(); i++)
 result += (i+1) + ". (";
 TrueFalseQuestion t = questions.get(i);
 result += t.getPointsValue();
 result += " points)\n\n" + displayQuestion(i);
 result += "\n\n";
 return result;
 // Get test length (number of questions)
 public int length ()
 return questions.size();
 // Submit answer to a specific question
 public boolean answer(int number, String a)
 // Question numbers run from 0-(max-1) -- THIS WAS AN OFF-BY-ONE ERROR AT FIRST
 if (number >= 0 && number < questions.size())
 TrueFalseQuestion t = questions.get(number);
 t.submitAnswer(a);
 return true; // Question was answered
 else
 return false; // Unable to answer (nonexistent) question
 // Score exam
 public void scoreExam (boolean useNoBS)
 scoreEarned = 0;
 for (int i = 0; i < questions.size(); i++) // For each question in exam
 TrueFalseQuestion t = questions.get(i); // get current question
 scoreEarned += t.getPointsEarned(useNoBS);
}// Test harness for the Test and *Question classes
import java.util.*;
public class QuizDriver
 public static void main(String[] args)
 // Create a new Test object
 Test exam = new Test("Sample Exam", "Select the correct answer for each question");
 setUp(exam);
 Scanner sc = new Scanner(System.in);
 System.out.println(exam.getInstructions());
 // Administer exam
 for (int i = 0; i < exam.length(); i++)
 // Print out current question
 System.out.println(exam.displayQuestion(i));
 // Get user answer
 System.out.print("Your answer: ");
 String ans = sc.nextLine();
 if (ans.equals("")) // Handle blank responses for unanswered questions
 ans = null;
 exam.answer(i, ans);
 // Get exam results
 exam.scoreExam(true);
 System.out.println("Your final score was " + exam.getScore() + " points.");
 private static void setUp (Test t)
 TrueFalseQuestion x = new TrueFalseQuestion("The sky is blue.", "true", 2);
 t.addQuestion(x);
 x = new TrueFalseQuestion("The first FORTRAN compiler debuted in 1957", "true", 5);
 t.addQuestion(x);
 x = new TrueFalseQuestion("Spock was a Vulcan", "false", 3);
 t.addQuestion(x);
}This program is far from finishing.
I have many questions about this program, but let me ask this one first:
In the TrueFalseQeustion class, why are there so many constructors? What is the purpose of setting some of the variables to default values?
Thank you very much!!!
Edited by: Terry001 on Apr 16, 2008 10:02 AM

newark wrote:
Stop ignoring the error messages. You seem to think that an error message means you're doing the assignment wrong. It's probably a simple fix. Post the exact error messages, as well as the code that corresponds to them. The error message will tell you exactly what line the problem occurs on, so you know right where to look.Hi,
After some modifications, the program now gives me the result the assignment wants when I run it. But I still have trouble with the MultipleChoiceQuestion class
Here is the complete program
QuizDriver class
// Test harness for the Test and *Question classes
import java.util.*;
public class QuizDriver
 public static void main(String[] args)
 // Create a new Test object
 Test exam = new Test("Sample Exam", "Select the correct answer for each question");
 setUp(exam);
 Scanner sc = new Scanner(System.in);
 System.out.println(exam.getInstructions());
 // Administer exam
 for (int i = 0; i < exam.length(); i++)
 // Print out current question
 System.out.println(exam.displayQuestion(i));
 // Get user answer
 System.out.print("Your answer: ");
 String ans = sc.nextLine();
 if (ans.equals("")) // Handle blank responses for unanswered questions
 ans = null;
 exam.answer(i, ans);
 // Get exam results
 exam.scoreExam(true);
 System.out.println("Your final score was " + exam.getScore() + " points.");
 private static void setUp (Test t)
 Question x;
 x = new TrueFalseQuestion("The sky is blue.", "true", 2);
 t.addQuestion(x);
 x = new TrueFalseQuestion("The first FORTRAN compiler debuted in 1957", "true", 5);
 t.addQuestion(x);
 x = new TrueFalseQuestion("Spock was a Vulcan", "false", 3);
 t.addQuestion(x);
 x = new MultipleChoiceQuestion("What is the color of the car\na.Red\nb.Green", "a. Red", 3);
 t.addQuestion(x);
 x = new MultipleChoiceQuestion("What is the name of this class\na.CSE110\nb.CSE114", "b, CSE114", 3);
 t.addQuestion(x);
}Test
public class Test
 // Class constant
 public static final int MAX_NUMBER_OF_QUESTIONS = 10;
 // Class instance variables
 private String testName;
 private int scoreEarned; // What the student earned on the exam
 private int scorePossible; // Total point values of all questions
 private String instructions; // Exam header text
 private ArrayList<Question> questions; // Create inside constructor
 // Methods
 public Test (String name, String instr)
 testName = name;
 scoreEarned = 0;
 scorePossible = 0;
 instructions = instr;
 questions = new ArrayList<Question>(); //[MAX_NUMBER_OF_QUESTIONS];
 public String getInstructions()
 return instructions;
 public int getScore()
 return scoreEarned;
 public void addQuestion (Question q)
 scorePossible += q.getPointsValue();
 questions.add(q); // Automatically append question to end of test
 public String displayQuestion (int position)
 if (position < questions.size())
 return (position+1) + ". " + questions.get(position).getQuestion();
 else
 return null;
 public String displayTest ()
 String result = "";
 for (int i = 0; i < questions.size(); i++)
 result += (i+1) + ". (";
 Question t = questions.get(i);
 result += t.getPointsValue();
 result += " points)\n\n" + displayQuestion(i);
 result += "\n\n";
 return result;
 // Get test length (number of questions)
 public int length ()
 return questions.size();
 // Submit answer to a specific question
 public boolean answer(int number, String a)
 // Question numbers run from 0-(max-1) -- THIS WAS AN OFF-BY-ONE ERROR AT FIRST
 if (number >= 0 && number < questions.size())
 Question t = questions.get(number);
 t.submitAnswer(a);
 return true; // Question was answered
 else
 return false; // Unable to answer (nonexistent) question
 // Score exam
 public void scoreExam (boolean useNoBS)
 scoreEarned = 0;
 for (int i = 0; i < questions.size(); i++) // For each question in exam
 Question t = questions.get(i); // get current question
 scoreEarned += t.getPointsEarned(useNoBS);
}Question
public class Question
// Class constants
public static final int MIN_DIFFICULTY_LEVEL = 1;
public static final int MAX_DIFFICULTY_LEVEL = 5;
public static final int DEFAULT_DIFFICULTY_LEVEL = 1;
public static final int DEFAULT_POINT_VALUE = 1;
public static final String DEFAULT_CATEGORY_VALUE = "none";
// Class instance variables
protected String questionText;
protected String correctAnswer;
protected String userAnswer;
protected int pointsValue;
protected String category;
protected int difficultyLevel; //TODO: set a range for difficulty levels
// Constructors
public Question (String text, String answer, int pts, String ctgry, int level)
 questionText = text.trim();
 correctAnswer = answer.trim();
 userAnswer = null;
 if (pts >= 1)
 pointsValue = pts;
 else
 pointsValue = DEFAULT_POINT_VALUE;
 category = ctgry.trim();
 if (level >= MIN_DIFFICULTY_LEVEL && level <= MAX_DIFFICULTY_LEVEL)
 difficultyLevel = level;
 else
 difficultyLevel = DEFAULT_DIFFICULTY_LEVEL;
 // Overloaded (simplied) constructors
 public Question (String text, String answer, int pts)
 this(text, answer, pts, DEFAULT_CATEGORY_VALUE, DEFAULT_DIFFICULTY_LEVEL);
 public Question (String text, String answer, int pts, String ctgry)
 this(text, answer, pts, ctgry, DEFAULT_DIFFICULTY_LEVEL);
 public Question (String text, String answer, String ctgry)
 this(text, answer, DEFAULT_POINT_VALUE, ctgry, DEFAULT_DIFFICULTY_LEVEL);
 public Question (String text, String answer, int pts, int level)
 this(text, answer, pts, DEFAULT_CATEGORY_VALUE, level);
 // Methods
 public String getQuestion ()
 return questionText;
 // Use this method to store user answers
 public void submitAnswer (String ans)
 userAnswer = ans;
 public boolean answerIsCorrect (String userAns)
 if (userAns == null)
 return false;
 else
 // Normalize and compare answers
 char key = normalize (correctAnswer); //Get the first letter of an answer
 char ans = normalize (userAns); //Get the first letter of an answer
 return (key == ans);
 public boolean answerIsCorrect ()// Why do we need two answerisCorrect() methods?
 return answerIsCorrect (userAnswer);
 public int getPointsValue ()
 return pointsValue;
 public int getPointsEarned (boolean userNoBSRule)
 System.out.println ("useNoBS: " + userNoBSRule + "\tuseAnswer: " + userAnswer + "\tcorrectAnswer: " + correctAnswer);
 if (userNoBSRule && (userAnswer == null))
 return 1;
 else if (userAnswer == null)
 return 0;
 if (answerIsCorrect() == false)
 return 0;
 else
 return pointsValue;
 public String getCorrectAnswer ()
 return correctAnswer;
 public boolean hasBeenAnswered ()
 return (userAnswer != null);
 private char normalize (String input)
 if (input != null)
 input = input.trim();
 input = input.toLowerCase();
 return input.charAt(0);
 else
 return ' ';
 TrueFalseQuestion
public class TrueFalseQuestion extends Question
public TrueFalseQuestion (String text, String answer, int pts, String ctgry, int level)
 super(text, answer, pts, ctgry, level);
 public TrueFalseQuestion (String text, String answer, int pts)
 super(text, answer, pts, DEFAULT_CATEGORY_VALUE, DEFAULT_DIFFICULTY_LEVEL);
 public TrueFalseQuestion (String text, String answer, int pts, String ctgry)
 super(text, answer, pts, ctgry, DEFAULT_DIFFICULTY_LEVEL);
 public TrueFalseQuestion (String text, String answer, String ctgry)
 super(text, answer, DEFAULT_POINT_VALUE, ctgry, DEFAULT_DIFFICULTY_LEVEL);
 public TrueFalseQuestion (String text, String answer, int pts, int level)
 super(text, answer, pts, DEFAULT_CATEGORY_VALUE, level);
 // Methods
 public String[] getPossibleAnswerChoice ()
 String[] possibleAnswerChoice = {"true", "false"};
 return possibleAnswerChoice;
} MultipleChoiceQuestion
public class MultipleChoiceQuestion extends Question
 public MultipleChoiceQuestion (String text, String answer, int pts, String ctgry, int level)
 super(text, answer, pts, ctgry, level);
 public MultipleChoiceQuestion (String text, String answer, int pts)
 super(text, answer, pts, DEFAULT_CATEGORY_VALUE, DEFAULT_DIFFICULTY_LEVEL);
 public MultipleChoiceQuestion (String text, String answer, int pts, String ctgry)
 super(text, answer, pts, ctgry, DEFAULT_DIFFICULTY_LEVEL);
 public MultipleChoiceQuestion (String text, String answer, String ctgry)
 super(text, answer, DEFAULT_POINT_VALUE, ctgry, DEFAULT_DIFFICULTY_LEVEL);
 public MultipleChoiceQuestion (String text, String answer, int pts, int level)
 super(text, answer, pts, DEFAULT_CATEGORY_VALUE, level);
 // Methods
 String possibleAnswers;
 public String getPossibleAnswers ()
 return possibleAnswers;
 public void addAnswerChoice (String answerChoice)
 String ansChoice = answerChoice;
 questionText += "\nansChoice";
 possibleAnswers = answerChoice;
 public void printAnswerChoice ()
 System.out.println (questionText);
} I don't understand why the assignment wants me to build a method in the MultpleChoiceQuestion class to store the potential answer choices, I can make the program display the potential answer choices by including them in the questionText as following in the QuizDriver class
Question x;
x = new MultipleChoiceQuestion("What is the color of the car\na.Red\nb.Green", "a. Red", 3);
t.addQuestion(x); I don't know how to allow the client to construct the list of answer choices one at a time(add one potential answer choice by calling the addAsnwerChoices() method once)
Here are a few original sentences of my assignment which describe what I should do with the MultipleChoiceQuestion class
Using TrueFalseQuestion as a model, develop a new MultipleChoiceQuestion class that can be used to represent a problem where the user must select one of several answer choices (e.g., "Select answer (a), (b), (c), or (d)."). This new question type should have all of the same externally-visible functionality as TrueFalseQuestion, except that it must:
maintain a list of potential answer choices
provide a method that allows the client to construct the list of answer choices one at a time (i.e., the client should be able to call an addAnswerChoice() method to pass a new answer option to the MultipleChoiceQuestion.)
display (as part of the question text) the list of answer choices with appropriate letters ("abcd" instead of "0123") I don't understand what these sentences mean.
1. "Maintain a list of potential answer choices"-- this reminds me of the getPossibleAnswerChoice() method in the TrueFalseQuestion class
public String[] getPossibleAnswerChoice ()
 String[] possibleAnswerChoice = {"true", "false"};
 return possibleAnswerChoice;
 }I wonder that if the potential answer choices I have to store in the MultipleChoiceQuestion class are only letters "a", "b", "c", "d", etc, or include the answer text coming after the letters(eg. a.Red, b.Green)
2. "provide a method that allows the client to construct the list of answer choices one at a time". How do I achieve the functionality "one at a time"? Do I need to pass the input of the client (a potential answer choice) to the variable of the method which stores the list of potential answers?
3. "display (as part of the question text) the list of answer choices with appropriate letters". My question here is that: When the client type in one possible answer, should I append it to the variable questionText? (So I use the questionText variable in the methods of the first and second steps)
Thank you very much for your nice help!
Edited by: Terry001 on Apr 21, 2008 8:01 AM

A question about the SPOOL command in sqlplus

Dear all,
I have a question about the SPOOL Command and I would appreciate if you could kindly give me a hand. Consider the following sql script.
SPOOL result.txt
SELECT * FROM mytable;
SPOOL OFF;This works pretty well, and the whole content of the table "mytable" is exported to the text file "result.txt". However, sqlplus prints also the number of lines
printed after each query. As a result, after running this script, at the end of the file, I have always a line like
"20541 lines returned"How can I avoid this line (the number of returned lines) in my result file?
Thanks in advance,
Dariyoosh

Peter Gjelstrup wrote:
Hi Dariyoosh,
As you are about to find out, SQL*Plus is a really powerful tool once the wonders of it are discovered.
You really should study the reference
http://download.oracle.com/docs/cd/E11882_01/server.112/e10823/toc.htm
In your current case especially the SET command
http://download.oracle.com/docs/cd/E11882_01/server.112/e10823/ch_twelve040.htm#BACGAJIC
Regards
PeterHello there,
Thank you very much for your attention to my problem and in particular the interesting links.
Kind Regards,
Dariyoosh

Some question about fade in // fade out by hideEffect and showEffect in Actionscript

Some question about fade in // fade out by hideEffect and
showEffect in Actionscript
Please kindly take a look at the following page:
http://camusmiu.no-ip.com/HounganQuestion/PictureHolderTest.html
(can view source)
I tried to make an image preloaded and scale the image to
it's preferred size.
When I came to consolidate the stuff into a component, I
found the application goes weird as I implementation the show/hide
effect.
The third trial which just hide and show the images directly,
instead of using viewstack, fail to bring the second image onto
screen.
It just used fadeOut instead of fadeIn(you see there is a
flash of the second image)
After some study of showEffect and hideEffect behaviour,
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this._fadeIn:Fade = new Fade();
this._fadeIn.alphaFrom = 0;
this._fadeIn.alphaTo = 1;
this._fadeIn.duration = 1000;
this._fadeOut:Fade = new Fade();
this._fadeOut.alphaFrom = 1;
this._fadeOut.alphaTo = 0;
this._fadeOut.duration = 1000;
Component_A.visible = true;
Component_A.setStyle("showEffect", this._fadeIn);
Component_A.setStyle("hideEffect", this._fadeOut);
then when I set Component_A.visible = false, the sequence
works like following:
Component_A.visible = true
Component_A.visible = true, alpha = 100;
Component_A.visible = true, alpha = 50;
Component_A.visible = true, alpha = 0;
Component_A.visible = false;
The above sequence works visa versa as:
Component_A.visible = false;
Component_A.visible = true, alpha = 0;
Component_A.visible = true, alpha = 50;
Component_A.visible = true, alpha = 100;
Component_A.visible = true;
(Correct me if i am wrong)
========================================================================================== ====
From what I observe from the application, I have two
question.
1) When more than one component using the this._fadeIn,
this_fadeOut as the hide/show effects, the component in instance of
this._fadeIn? will it mess out if more than one component using the
fadeIn instance in the same time?
2) from the third component, i.e. PictureHolder3, when I load
other the picture , it fade out the new image instead of fading
in... Seems there is problem if I hide show too frequent. I think
when I hide then show right the way, the component only do the hide
part...
Can someone pls look into it and tell me what I did wrong?
Cuz in normal practice I don't think appropriate to use ViewStack
in Actionscript...

Hello Jack,
Currently, you can only import an swf file or you can embed videos from youtube, vimeo etc. into Muse / add HTML5 Video to Your Website.
Take a look at these simple videos that explain the currently available processes for adding videos in Muse, in a step by step method:
1. http://tv.adobe.com/watch/learn-adobe-muse-cc/inserting-a-youtube-flic kr-or-hulu-video/
2. http://www.youtube.com/watch?v=5in4swnIFsw
3. http://www.youtube.com/watch?v=KnBFLQheOk4
Hope this helps.
Cheers
Parikshit

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