Binary File, ArrayList, Serialization

So I'm making a program that will be writing to a binary file. When the program first starts it checks if the binary file is in the directory the program is in, if it is not the file is written to the hard drive. This program will be using an ArrayList to manage objects and the objects will be serialized, but what about the ArrayList? Is it serialized, written to the file, or what? If it is written to the file how would I do that?

Er I was following an online tutorial on it..Not
really my code just filling in stuff. As you can
tell, I'm a newbie in Java..Got any ideas on how to
serialize it?I would really like to know what settingsHash is...
ArrayList mylist = new ArrayList();
FileOutputStream fileOut = new FileOutputStream(MyFile);
///fileOut = new FileOutputStream(MyFile); commented out the redundancy
ObjectOutputStream oos = new ObjectOutputStream(fileOut);
oos.writeObject(myList);// hopefully serializes your ArrayList to the file
oos.close();// please to close streams after using

Similar Messages

Reading an object from a binary file

i am writing objects into my binary file using printwriter class. i am able to write objects into the file but i am having problems reading the object from the file. is there any other way of going about it. i tried using the objectoutputstream and object input stream class. but i am getting run time errors coz of something to do with serialization
i am storing records as a object into a binary file so that it is easy to seek my records

Of course you have trouble reading objects after you wrote them with a PrintWriter.
You should rather have fixed the Serialization errors: only objkects that implement Serializable correctly can be serialized.

Binary file compare

I'm sorry. I didn't want to have to post here, but I've been banging my head on this all week. Hopefully somebody here can shed some light on this for me.
I'm trying to write an application that compares a series of binary files in a user-defined order. The user needs to be able to specify the type of change that has occured ( > < = !, and numerical searches) for a given byte. (I am also supporting WORD/DWORD, but it's the same principal) To clarify, imagine:
Byte at given offset: (((fileA < fileB) = fileC) != fileD) ...
Now, my original code worked, but it was extremely poor. It had two methods fullCompare() and partialCompare(), it read data directly from the DataInputStream, and used skipBytes() to pass over bytes that had been excluded from a previous search. I kept thinking "There has to be a better way to do this." So I made it as simple as possible! I created an inner class called BinaryFile. BinaryFile reads the data (using getUnsignedByte() getByte() getUnsignedShort() getShort() etc... depending on the user's option.
I created two instances of this class... One I call 'result' and the other 'bin' the files are read in by the constructor and stored in an ArrayList<Integer> (later I cast my Shorts to int)
Now, 'result' holds the first file opened, and bin holds each additional file, ex:
BinaryFile result = new BinaryFile("C:\\test1.bin", BinaryFile.UNSIGNED_WORD);
All of this works�. OK, so now I run my first compare:
compare(new BinaryFile("C:\\test2.bin", BinaryFile.UNSIGNED_BYTE), GREATER_THAN);
again, everything works like a champ.. now to actually compare the files, I do this:
public void compare(BinaryFile bin, int compareType) {
for (int count=0; count < results.values.size(); count++) {
if (results.values.get(count) != null) {
switch (compareType) {
case GREATER_THAN:
if (bin.values.get(count) > results.values.get(count))
results.values.set(count, bin.values.get(count));
else
results.values.set(count, null);
break;
��..
Now, it works for the FIRST two files that I compare, but after that it's like it started setting null when it wasn't supposed to�. I know that nobody probably read this far, but somebody please help me, this is killing me.

I posted that at some unruly hour of the morning, while tired and frustrated... I had a flight from Korea to Japan today and spent the entire trip reading J2SE 5 docs about collections and generics, etc... So I'm going to give this one more go-round before I ask for help. I hate being beaten by a machine, asking for help makes me feel like I lost!
Thanks

Saving ResultList as binary file

Hi,
I like to store my ResultList as binary on file drive. The aim is to safe drive space and execution time for creating the report (XML or ASCII) for each UUT.
At the moment i had nothing figured out doing such stuff in TS.
Thats the reason why I started this thread to discuss with you what is possible or impossible.
Do not care about the programming language. LV,CVI,C++,C# or anything else is welcome.
My idea sounds simple
1.) Creating : Take the address space of the ResultList and save it to disk. Problem: Size of Buffer !!
2.) Consuming: Take the Binary file and put it back to TS and let a the TestReport (XML, ASCII or whatever you want) Callback running.
Greetings from the lake of Constance, Germany
Juergen
=s=i=g=n=a=t=u=r=e= Click on the Star and see what happens :-) =s=i=g=n=a=t=u=r=e=

Hi Johann,
Thanks for your answer. But unfortunately it pointed not out what I really want to know. Or lets say what i want to discuss.
The major task is: Is there a way to safe a the complete ResultList (if you take a look into the TestReport-Callback it will be variable "Parameters.MainSequenceResults") as a binary-file without any modifiactions or generator/parser stuff.
The first aim of this procedure should be no loss of data by saving huge number of file drive space. The Second is saving execution time for generating the report file in the Testreport callback.
The last few "lunch-breaks" I have dealed with this question to figure out a useful solution.
I have found several things in TS4.0 that deal with this topic the serialization of data
One the one hand there is a Engine method "SerializeObjects" . I got this running (I hoped so) for binary data but for re-building
just for visualizing the data to an Operator. I found no running solution. On the other hand there is PropertyObject method
"Serialize" This stuff was working fine. But data always have been stored in INI-Format on file. So there was no great benefit
on file size.
While looking on the TS4.0 poster on the wall i was focused on PropertyObjectFile. And with it found a resonable solution for this task. It is simple. Create a PropertyObjectFile, do some settings like binary and path, get the parent PropertyObject from it, and ceate a new varaiable in the data folder. Now take the ResultList, clone and add it to your variable. The last step is saving.
A comparsion to the XML-Report (shipped with NI)
Binary <--> XML
Filesize: 23 kB <--> 2202 kB that is a reduction of filedrive space of over 95% !!!
Executiontime 160ms <--> 1960ms that means i have to spent only 8% of time as in XML
I have attached an example. It writes the report on Root C:\report.dat
For you and all other members feel free to test it and please tell me what you think about it.
If there is an other solution so lets discuss it.
Greetings
juergen
=s=i=g=n=a=t=u=r=e= Click on the Star and see what happens :-) =s=i=g=n=a=t=u=r=e=
Attachments:
ResultListAsBinary.seq ‏12 KB

How to create an object of a binary file?

Does anyone know how I may create a serializable object of a binary file?
Thanks.

Sorry for the late reply.
No, I'm not trying to deserialise a serialised object. My intent is to create a serialisable object from a binary file and then store this object in a JMS Queue.
One option is to create a byte array of the binary file. Wondering if there are other options available.

Storing data in tablemodel to a binary file

hi,
i have a program that uses AbstractTableModel with Jtable....I need to store data in a file when the program closes... i heard that there is a way to some how convert data in Tablemodel to a binary file and retrieve data from the binary file...other then storing it in a text file and parsing the data. So can anyone help me?
Thanks

You can loop through the data in the table and Serialize the data using object serialization.
Simply implement the java.io.Serializable interface. Then use this code for serizlizing the data. Note that to serialize data, it must be an object not primitive types.
serialize to a binary file
try
    ObjectOutputStream os = new ObjectOutputStream(new FileOutputStream(new File("datastore.ser")));
    os.writeObject(<your data from table>);
    os.flush();
catch (IOException ioe) { ioe.printStackTrace(); }
reconstructing the object from binary file
try
    ObjectInputStream is = new ObjectInputStream(new FileInputStream(new File("datastore.ser")));
    obj = (<data type of Object>) is.readObject();
catch (IOException ioe)
    ioe.printStackTrace();
}Hope this helps,
Riz

Siebel 8.0.0.12 Fix Pack; Unable to get the seed from binary file.

Hello Folks,
Can anyone throw some light into what action is required on my scenario.
I have applied Fix Pack Siebel 8.0.0.12 on top of 8.0.0.11 SBA. After it is appled, I am facing a documented issue within the Release Notes for the 8.0.0.12 Fix Pack
The issue is "UNABLE TO LAUNCH URL AFTER APPLYING SIEBEL 8.0.0.12". I tried the steps given with the MR document, however, I am still having this issue.
I am also not sure what is expected at the step of; Run the following command: seedgeneratorutil myseed.dat abcdef .
It's asking me for a value to enter for seed at command prompt. "Enter the seed":
what I should give here. As an assumption values,I gave SADMIN and tried to launch but still shows up the same error
Please Assit
Steps Details from Release Notes:
UNABLE TO LAUNCH URL AFTER APPLYING SIEBEL 8.0.0.12
Component: Server Infrastructure
Subcomponent: SWSE
Product Version: Siebel 8.0.0.12
Base Bug ID: 11938270
**Users are unable to launch the URL after applying the Siebel 8.0.0.12 Fix Pack.
**Use the following workaround to address this issue:
Navigate to the eappweb/bin directory from the command line on the SWSE installation.
Run the following command:
seedgeneratorutil myseed.dat abcdef
NOTE: In the example, myseed.dat is a filename. You can give any file name you wish.
The myseed.dat file is generated in the eappweb/bin directory.
Edit eapps.cfg to include the following parameters under the SWE section:
seedfile = < complete path for myseed.dat >
Bounce the web server.
(For Linux only) Copy libmod_swe.so from the eappweb/bin folder to the web/ohs/modules folder
Thanks
Kumar

Wilson,
Thanks for your reply.I have repeated the steps and regenerated the error messages.
Browser
Message:
An error occurred while trying to process your request. This error indicates a problem with the configuration of this server and should be reported to the webmaster (along with any errors listed below). We apologize for the inconvenience
Initialization error:
Unable to get the seed from binary file.
Log
2021 2011-09-20 23:23:01 0000-00-00 00:00:00 +0530 00000000 001 003f 0001 09 ss110920_7068 7068 7852 E:\sba80\SWEApp\log\ss110920_7068.log 8.0.0.12 [20444] ENU
ProcessPluginState ProcessPluginStateError 1 000000024e781b9c:0 2011-09-20 23:23:01 7852: [SWSE] Unable to get the seed from binary file.
Eapps.cfg
[swe]
Language = enu
Log = errors
LogDirectory = $(SWSERoot)\log
ClientRootDir = $(SWSERoot)
SessionMonitor = False
AllowStats = true
LogSegmentSize = 0
LogMaxSegments = 0
DisableNagle = False
seedfile = E:\sba80\SWEApp\BIN\80012seed.dat
Thanks
Kumar

Report using Binary file

Hi All , can anyone help me here ...
I used “Write to Binary” to write my report , at first stage this file is writing headers , including column headings . at 2nd writing stage it is writing data in columns. This file can be viewed in .doc or .xls format. I have three issues
1.         If I want to print this file from Front Panel , what I should do?
2.         other thing is if I stop logging and then start for another span , it starts writing from the first line instead of from last line , because of this problem it is causing over-writing .
3          another thing , lets say if for 2nd or 3rd logging , I want to display sub-headings (test-1 , test-2) , how to insert , for example :
MAIN HEADING (COMPANY NAME , REPORT TITLE )
DATE , PRODUCT INFO , OPERATOR NAME
COL1              COL2              COL3              COL4
Subheading (test-1)
Value1             Value2             Value3             Valye4
Value1             Value2             Value3             Valye4
Value1             Value2             Value3             Valye4
Subheading (Test-2)
Value1             Value2             Value3             Valye4
Value1             Value2             Value3             Valye4
Value1             Value2             Value3             Valye4
Any help in this regard will be highly appreciated.
Regards
Faiyaz
Attachments:
report-writing-binaryfile.vi ‏68 KB
02-display-subVI.vi ‏12 KB

Hi Faiyaz,
1. How Do I Print a File Programmatically From LabVIEW?
2. Please the Programming >> File I/O >> Advanced File Functions >> Set File Position function on the block diagram after the Open/Create/Replace File function and set the from input to "end." This will append new data to the end of the file.
3. You can simply add that information to the Format into String you are writing to the second Write to Binary file.
Michael K.
| Michael K | Project Manager | LabVIEW R&D | National Instruments |

How to open and read binary files?

How do I open and read Binary files?

Did you look on The Unarchiver's web site where it has a link to older versions? http://theunarchiver.googlecode.com/files/TheUnarchiver3.2_legacy.zip
The best thing to do is ask your friends what programs they used to produce these files, or at least what format files they are producing. Otherwise it's like being shown a car and given a bundle of 200 keys with no idea to which one to use, or even if any of them work with that car.
Using The Unarchiver will likely not do anything because it too will not know what format files are involved, and they may not even been in an archived format. If they sent you a Word file without telling you (a favorite of Windows users to do -- it drives me crazy when they could have just sent them in plain text), The Unarchiver won't open them. If it's a picture file then using Hexedit will just show you a bunch of unintelligible stuff as shown in an earlier post, though you may see a line of text providing a hint.
As I said earlier, often .bin may be an executable program which needs another program to actually interpret it. That's what Java is trying to do. Still, it may think it can execute the file, but it is highly unlikely somebody would send you an executable program (and if they did I would not trust it). For all you know it may be a Windows virus.

How do i disable to pop up asking me if i want to save or cancel the binary file i am trying to download?

everytime i download a show or movie from the internet a pop up asks me:
"you have chosen to open xxxxxx which is a: Binary File from: httpxxxxx would you like to save this file - SAVE or CANCEL"
this never used to happen on the older versions of firefox. it is so annoying - is there any way to turn it off?
i am running mac os 10.5.8 and no, there is no option to click a 'don't ask me again' feature in the pop-up dialog.

I'd first try downloading an installer from the Apple website using a different web browser:
http://www.apple.com/quicktime/download/
If you use Firefox instead of IE for the download (or vice versa), do you get a working installer?

DE PDP-1 binary file from Java

Can someone here help me, please!?
Anyone know how to convert a Java class file into a binary file that will run natively on my Digital PDP-1 computer? I just spent over $120,000 for it! Thanks.
This resurrected thread was first posted November 25, 1960 at 8:25AM
-------------------------------------------------------------------------

This resurrected thread was first posted November 25,
1960 at 8:25AMIn what time zone?

How can I open different binary files from BLOB column ?

If we store some type of binary file (XLS, DOC, PDF, EML and so on, not only pictures) in BLOB column how can I show the different contents? We use designer and forms 9i with PL/SQL.
How can I copy the files from BLOB to file in a directory or how can I pass BLOB's content to the proper application directly to open it?

The mime type is just a string as explained above (e.g. application/pdf...). There are lot of samples here and on metalink.
E.g. add a column mime_type varchar(30) to your blob table. Create a procedure similar to the following:
PROCEDURE getblob
(P_FILE IN VARCHAR2
IS
vblob blob;
vmime_type myblobs.mime_type%type;
length number;
begin
     select document, mime_type into vblob,vmime_type from myblobs where docname = p_file;
     length := dbms_lob.getlength(vblob);
     if length = 0 or vblob is null then
     htp.p('Document not available yet.');
     else
     owa_util.mime_header(vmime_type);
     htp.p('Content-Length: ' || dbms_lob.getlength(vblob));
     owa_util.http_header_close;
     wpg_docload.download_file(vblob);
     end if;
exception
     when others then
     htp.p(sqlerrm);
END;
Create a DAD on your application server (refer to documentation on how to create a DAD).
Display the blob from forms (e.g. on a when-button-pressed trigger):
web.show_document('http://myserver:port/DAD/getblob?p_file=myfilename','_blank');
For storing blobs in a directory on your db server take a look at the dbms_lob package.
For storing blobs in a directory on your app server take a look at WebUtil available on OTN.
HTH
Gerald Krieger

How do you open multiple binary files and plot them all on the same graph?

I have three different binary files and I want to plot all 3 of them onto a graph.
I am familiar with opening and reading a single binary file. (Thanks to the help examples!)
But to do multiple numbers at the same time? I was thinking of putting 3 different 'reading from binary file' blocks with the rest of the 'prompts', 'data type', etc.. and then connecting them on the same wire.
However, I got into a mess already when I tried to read one .bin file to dynamic data type --> spectral measurements --> graph waveform. The error was Not enough memory to complete this operation... Why is that? That didnt happen in the help example "Read Binary File.vi"... Has it got something to do with the dynamic data type?
Thank you for your time.
Jud~

Have a look at the image below and attached VI. Simply enter the different paths into the PathArray control.
R
Message Edited by JoeLabView on 07-30-2008 09:59 PM
Attachments:
multipleBinary2Graph.vi ‏18 KB
multipleBinary.PNG ‏5 KB

How can I convert the binary file content to XML message

Dear friends,
I poll the binary file from a ftp server but the payload only includes the binary content, no XML structure in the payload, I hope to convert the binary content to a element node within the XML structure, how can I do that? via content conversion?
Thanks and regards,
Bean

Read the binary file stream using java I/O standard functions and convert the read stream to Base64 format. Now map this content to one of the field in target XML structure.
You need a java mapping for this.
what is your target system?
Thanks,
Gujjeti.
Hi Gujjeti,
Thanks a lot for your kind help, my target system is R/3.
Can I achieve that with a UDF or a simple way?
Regards,
Bean

Deleting a single element from a binary file

I am working on a server application that must keep track of the messages that have been sent but not responded to. After I send a message, I append it to an array cycling through an uninitialized shift register and I write it to the end of a binary file. When I receive a response to a message, which was probably but not necessarily the first message sent, I delete that message from the array and the file. This allows me to look up entries quickly but also to maintain a permanent record of what messages have been sent and not responded to.
Basically, I need an intelligent way to make a file, or any other permanent storage medium, act effectively like a queue. The problem with the current implementation is that when I delete one variable-sized entry from the file, I need to move all subsequent entries, which are usually all of the other entries in the file, forward in memory to take its place. Is there a way to get around recopying the majority of the file or to implement this entire thing more intelligently?

You can organize your datafile as a list. For example In this list any record consists of a fixed size data field and referencies (file position f.e.) to the next record and to the previous record. You can then rewrite the record-have-to-be-deleted with new one, or you can "delete" this record modifiyng the referencies of the "previous" and the "next" records. When you will add a new record you can write one at this "free" place.
The other way is to manage two files. The first one contains your data record by record. The second one contains the numbers of the records and the corresponding datafile positions or record counter. This second file can be very small and easy-to-manage. It can represent the only record's queue position in the datafile. You can rewrite your records, mark them as deleted without moving large portions of data.
You can setup the datafile capacity in "number of records" term.
Additionally it is possible to use the records with variable length but it will be much more dificult.
Best regards, Evgeny.

Binary File, ArrayList, Serialization

Similar Messages

Maybe you are looking for