How to replace a line in file Java

Hi,
I want to replace a line in file sequencial.
I read file, but i don't know how to replace one line..
Thanks...

I supose this..
I usea a FileReader and BufferedReader to read a file.
I read a line, I know the number of the line, but how to say to method println o write what it's the line to replace?

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How to replace a line ina text file using java?

Hi ALL,
Does anybody know how to replace a line in a text file uisng java.

use this thing:
http://doesthatevencompile.com/current-projects/code-sniplets/ASCIIFile.htm
open the file,
read its contents, replace the text you need in the contents, set the contents back into the file.
it takes care of the IO for you.

How to replace a line in a csv file

Hi everyone,
What i need to do is to write into a csv file, line by line. When I'm in the line #1000, I need to go back to line #1 and replace the old line by a new line.
I only found a way to do this but I don't think it's a good way.
I read the actual file, I put it in an array (with spreadsheet string to array), I replace the text in the specific index of the array, I delete the old file and I convert the array to a spreadsheet string and then write it in a new file. It's strange but it works. Is there any other (smarter) way to do this?
Thank you
Stéphanie

Peachy wrote:
Unfortunatly, I can't have the same length on every line. I don't know what's going to be witten in the text.
Unfortunately, in this case you cannot really do what you want. Whenever you replace a line, all bytes to the right need to be shifted up or down to account for the change in length. A file is just a long sequence of bytes and a line break is just the presence of a newline character. There is no concept of "lines" per se.
LabVIEW Champion . Do more with less code and in less time .

How to replace bytes in a file?

How to replace some bytes in a file without rewriting it entirely?
bye
aldo

I repeat my question:I repeat my answer...
java.io.RandomAccessFile.
Have a look at the java doc!

How to write single line text file

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How many number of lines of code Java File can have?

Hi ALL
Is there any limit on java source file code length?
does more code (say more than 4000 line) impact on performace?
Is there any recomendation on code length and file size?
Thanks

Hi ALL
Is there any limit on java source file code length? There are some (VM) limitations but I have only hit that one when I had some generated code.
does more code (say more than 4000 line) impact on
performace?No, but you probably have a stupid design if you have 4000 lines in one file.
Is there any recomendation on code length and file
size?You should usually only have one top level clas per file, and you should try to have less than 1000 lines in one class.
Kaj

How to replace a string in file

if a file's content is:
aaa 123 456
bbb 341 343
ccc 343 233
now i want to replace 341 with 768
how?
& use which classes? thx!

I would suggest
java.io*;
Use a beffered Reader, read the file, and output into another one

How to create additional Line in file based on condition available as part of ZINVOIC02 Idoc segment

Scenario Details:
Receiving Zinvoic02 Idoc in PI. Idoc to file translation creates comma separated file with .csv extn
The logic was kept in such a way that how many E1EDP01 (items) are available in IDoc that many no of records will be created in csv file.
The file logic for some the fields is as below:
No of records
InvNumber
InvDate
CusNumber
LineitemDesc
Tax1Type
Tax1%
for 1st E1EDP01
E1EDK01-BELNR
E1EDK03-DATUM
E1EDK01-PARTN
Populate when E1EDP04/MSKWZ=O2 or O4 with E1EDP19/KTEXT
Hardcode when E1EDP04/MSKWZ=O2 or O4
Sum all E1EDP04 /MSATZ when E1EDP04/MSKWZ=O2 or O4
for 2nd E1EDP01
E1EDK01-BELNR
E1EDK01-DATUM
E1EDK01-PARTN
same as above
same as above
same as above
for 3rd E1EDP01
E1EDK01-BELNR
E1EDK03-DATUM
E1EDK01-PARTN
same as above
same as above
same as above
Additional Line to be created when one or more of E1EDP01 is having E1EDP04/MSKWZ = O3
same as above
same as above
same as above
Hardcode "REIM for USE TAX"
Hardcode ""
Hardcode ""
Now we have got addition requirement to add a new lineitem when tax code is equal to O3 for any of the E1EDP01.
Is it possible to create additional lineitem based on condition. If yes, please share what should be the approach.
How we can create the additional lineitem?
Currently we are using E1EDP01 to do context handling.
The target structure is :
MT_FILE
     INVOICE     0..unbounded
          InvNumber     0..1
          InvDate          0..1
          CusNumber     0..1
          LineitemDesc     0..1
          Tax1Type          0..1
          Tax1%               0..1

Hello,
Please add one extra field in the data structure of the target mapping and let its occurrence be 0..unbounded under the root node 'MT_ADP_Invoice'.
Apply the condition, if tax code MSKWZ (with its context changed to E1EDP01) equalsS to '03', then map it to the newly created target field whose occurrence is 0..unbounded.
This will then create an additional field which is your requirement.
The above is one way.
But if you want to have the same target field name as ADP_File appended for tax field being '03'.
Then in that case you can you two message mapping for one common operational mapping / interface.
In the first message mapping you need to have one target data structure created with the source data structure remaining the same as the one shown by you in scrn shot. Now this target data structure will be similar to the source, except that you need to add one more field at the end(name different from other fields) in target (whose occurrence should be 0..unbounded), and it needs to be mapped to E1EDP01 provided the tax code field MSKWZ(its context changed to E1EDP01) equalsS to constant '03'.
In the second message mapping you need to map the target structure of previous message mapping to the actual required structure. The newly added field should be mapped to ADP_File of your final target structure.
This will then create the same structure as required.
Note : Please change the occurence of ADP_File to 0..unbounded.
Regards,
Souvik

How to replace text in a file

Hi everyone,
I have a txt file and It has some data's. I want to specifically replace a character in the text file. Data's will be like this,
TT=15
S1ST=21601
S1EN=50400
S2ST=50401
S2EN=72000
S3ST=72001
S3EN=21600
GNST=00000
GNEN=00000
S1B1S=22800
S1B1E=23400
S1B2S=28800
S1B2E=30600
S1B3S=36000
S1B3E=36600
S1B4S=45000
S1B4E=46800
In the 2nd line i.e. S1ST=21601, I want to replace 36000 instead of 21601.
After replacing the specific character, data's should overwrite in the file or appending the file will also ok for me.
Give me a suggestion. I am using LV 8.2. So plz post your code in 8.2 ver
Thanks in advance.
Regards,
Vijay
Solved!
Go to Solution.

Check this out.
Edit:- attaching 8.2 version
With Regards
Miraz
Kudos is better option to thank somebody on this forum
Attachments:
String.vi ‏8 KB
String.vi ‏8 KB

How to handle blank line in File adapter

Hi,
I am using a file adapter with CSV as input file. If I have a blank line in CSV file, BPEL is failing read it, no instance is created and file is archieved.
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Thanks

Hi Yatan,
I am already using rejectedMessageHandlers, I am on 10.1.3.3.
Here's my bpel.xml
============
<?xml version = '1.0' encoding = 'UTF-8'?>
<BPELSuitcase>
<BPELProcess id="EmpAddressUpdABCSImpl" src="EmpAddressUpdABCSImpl.bpel">
<partnerLinkBindings>
<partnerLinkBinding name="ReadFile">
<property name="wsdlLocation">ReadFile.wsdl</property>
<property name="rejectedMessageHandlers">file://E:/HRARCHIVE/BadData</property>
</partnerLinkBinding>
<partnerLinkBinding name="InsertAddressUpd">
<property name="wsdlLocation">InsertAddressUpd.wsdl</property>
<property name="retryInterval">60</property>
</partnerLinkBinding>
</partnerLinkBindings>
<configurations>
<property name="sensorLocation">sensor.xml</property>
<property name="sensorActionLocation">sensorAction.xml</property>
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<activationAgents>
<activationAgent className="oracle.tip.adapter.fw.agent.jca.JCAActivationAgent" partnerLink="ReadFile">
<property name="portType">Read_ptt</property>
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</activationAgents>
</BPELProcess>
</BPELSuitcase>
Someone told me that this can be achieved by changing the native schema, I tried many options but no result. Please suggest me.
-- Shirish

How to replace a line segment?

Here's what I want to do:
Take the selected line segment, and replace it with a series of line segments, scaled to the length of the line.
I'm not quite sure how to go about this. I don't see any line object relating to a path item. All I see are anchors. I know I can access the two anchors of the line segment that's selected, but to begin with, how to I delete the line connecting the anchors?

Here's an image to help illustrate. The object on the left has a line segment selected. The script runs and removes the segment, then replaces it with the door path, scaled up to the correct width to fit:

How to ignore particular lines in File Adapater

Hi ,
We are aware we can ignore the comments in the begning of the file by putting the document offset in the sender adapater
but is there a way we can ignore comments if the occure in the middle of the line
like if my i/p file is like
transactionId=3c68ffae-10d61001cd5
uniqueId=3c68ffae-10d61001cd5
Wed Aug 30 21:33:20 UTC 2006
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broker_domain broker_org Accepted With Changes 29Aug2006110525 4500000020 $null 29Aug2006110525 Discrete_Order 0000352119 vendor1 SSP_CUSTOMER SSP_CUSTOMER $null $null $null $null $null $null $null $null $null $null $null $null $null 0001 $null $null $null $null $null 29Aug2006000000 $null $null $null $null $null 10 S107999436 Test Material created on 29 August 2006 SSP_CUSTOMER_domain S107999436 Test Material created on 29 August 2006 0000352119_domain 100000.0 $null EUR EA Accepted With Changes 29Aug2006110525 29Aug2006110525 S107999436 $null $null $null $null $null 1 Sup_Change_UI Accepted With Changes 29Aug2006110522 500.0 29Aug2006000000 29Aug2006000000 500.0 29Aug2006000000 $null $null $null 5302 $null $null $null $null $null $null $null $null 29Aug2006110522 $null $null $null $null $null $null $null $null $null $null $null $null $null 1 $null $null $null $null $null $null $null $null 600.0 29Aug2006000000 $null $null $null $null $null $null
recordindex=1
broker_domain broker_org Accepted With Changes 29Aug2006110525 4500000020 $null 29Aug2006110525 Discrete_Order 0000352119 vendor1 SSP_CUSTOMER SSP_CUSTOMER $null $null $null $null $null $null $null $null $null $null $null $null $null 0001 $null $null $null $null $null 29Aug2006000000 $null $null $null $null $null 10 S107999436 Test Material created on 29 August 2006 SSP_CUSTOMER_domain S107999436 Test Material created on 29 August 2006 0000352119_domain 100000.0 $null EUR EA Accepted With Changes 29Aug2006110525 29Aug2006110525 S107999436 $null $null $null $null $null 2 Sup_Change_UI Accepted With Changes 29Aug2006110522 500.0 30Aug2006000000 30Aug2006000000 500.0 30Aug2006000000 $null $null $null 5302 $null $null $null $null $null $null $null $null 29Aug2006110522 $null $null $null $null $null $null $null $null $null $null $null $null $null 1 $null $null $null $null $null $null $null $null 400.0 30Aug2006000000 $null $null $null $null $null $null
I dont want to read lines with #
Is there a way we can achieve this
Thanks
Amit

Hi,
Could you also try using the conversion agent to handle this type of problem ?
Only a thought.
http://help.sap.com/saphelp_nw04/helpdata/en/14/80243b4a66ae0ce10000000a11402f/frameset.htm
Kind regards
Colin.

Replace line in file

Hi,
does anybody know how to replace one line in a file with another line? I want to change only one line in a file and do not know how i can do it.
Greetings.

Would both the old and new lines be the samelength?
No, they differ in length.Then you can't do it without create a whole new file.
Read the old file.
Spit the content of the old file into a new one.
When you get to the line you want to change put the new line in instead of the old one...
Continue on copying the lines from old to new.
You CAN replace content in a file but if they have different length's you are SOL.

How to eliminate empty lines in Flat file.

Hi All,
How to delete the empty lines in flat file,i am explaining below with data
Here we have 3 fields with field lengths 30,10,34 i am checking the condition in message mapping if the middle field containing 9999999999 i am deleting the total record but in output file i am getting empty line how to eleminate empy lines in file please suggest me is it possible through Content Convertion.
Thanks,
Sudheer.
0500189175247200000500003141700000142888073108000009640566210000
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0500189175247200000500003351650000142896072908000009623005030000
0500189175247200000500000061170000142898072808000009613026140000
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0500189175247200000500000517450000142904073108000009640911680000
0500189175247200000500006901140000142905073008000009630927540000
0500189175247200000500001565590000142906073008000009630938540000
0500189175247200000500000210440000142907073108000009640765850000
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0500189175247200000500000069240000142909072908000009622980660000

Hi,
I think we could handle this with may be usage of Advanced UDF in Graphical mapping only.
Here as per the condition you are deleting the particular record but unknowingly blank value i.e. " " is getting passed so on target side blank node is created for this record.
You need to just avoid this blank Node.
If you can share the logic you have applied for Middle field as well the source and target structure I will be able to try the UDF code..based on it
Thanks
swarup

How to sync writing to a file?

Hi all,
I'm implementing a simple line logger for my web applications.
Basically, I have some class with a "write" method, that appends a line of text into a certain file.
All of my web apps log into the same file (by design).
How do I make sure writing to the file is synchronized?
The web apps cannot share logger objects between them (not even singletons, correct?) so using the 'synchronized' qualifier for the 'write' method won't work because each web app has its own instance of the logger object.
Also, FileLock won't work since all web apps "live" inside the same JVM (accoding to javadoc, FileLock is not suitable for syncing file-writes by different threads within the same JVM).
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hii...
can sum1 plz tell me how to replace bytes in a file?
i've used randomaccess to open the file....read is
contents and write back to it at the desired
locations using seek()...however at some position if
i wish to read the data and replace it with new data
at exactly the same location...how can i do it??
bye.i had already mentioned my problem....actually i want to read a record from a file and then update it at the same location in the file...so i need to replace it(or delete the record and re-write the new info).

How to replace a line in file Java

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