How to modify existing data in a file help me!!!!!

hi i had a file which contais the some data like
folder1:50
folder2:30
folder3:56 etc.....
now my problem is i want to update the integer value for a specified folder entry
i.e i want to modify folder1:50 to folder1:80 how to do it?
i am new to java PLZ help
i am unable to find best solution for this
thanks in advance

Well, it makes a big difference if what you're doing is always just replacing some bytes, or if bytes might be inserted or deleted.
In the latter case there really isn't much point in doing anything but generating a new version of the file by copying the unchanged bits and inserting the replacement bits. Then you can rename the old file to a back up and rename the new file to the old file name.
If you're always simply replacing one byte for another (and be careful because, depending on the character encoding, single characters may encode to a different number of bytes), then you can try using RandomAccessFile and, for added flexibility, you can memory map a file using RandomAccessFile.getFileChannel.map();
Either of these techniques will allow you to go to a particular position in the file and overwrite bytes to your heart's content. All your sample records are the same length. If the file is guaranteed to have all it's records the same length then, obviously, it will be easier to find the right bytes. If not you'll have to do a bit of searching.

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please see below sample of XML file, which is stored in "os_import_docs", column "document" as CLOB.
I would like to query this XML file using some SQL select.
How can I query data form below XML?
<?xml version="1.0" encoding="UTF-8"?>
<etd>
<header>
    <AR>000000000</AR>
    <AW>0</AW>
    <CT>S</CT>
    <CU>H</CU>
    <CZ>SS48</CZ>
    <BU>4</BU>
    <CH>0032</CH>
    <CK>2012-11-01</CK>
    <CL>21:18</CL>
    <CW>225</CW>
    <CX>0</CX>
    <CF>SS-CZL18</CF>
    <DV>2</DV>
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<account_group id="234">
    <account id="234">
      <invoice id="000742024">
        <da>
          <AR>000742024</AR>
          <AW>0</AW>
          <CT>D</CT>
          <CU>A</CU>
          <CH>0032</CH>
          <BY>31-10-2012</BY>
          <CA>25-10-2012</CA>
          <AB>234</AB>
          <AA>234</AA>
          <BS>88754515</BS>
          <AD>Mike Tyson</AD>
          <AC>Mike Tyson</AC>
          <AZ>CZ6521232465</AZ>
          <AE/>
          <CG>A</CG>
          <AL>A</AL>
          <BZ>.</BZ>
          <AH>Some street</AH>
          <AI/>
          <AF>Some city</AF>
          <AK>Kraj</AK>
          <AG>CZ</AG>
          <AJ>885 21</AJ>
          <CR>21-11-2012</CR>
          <AY>602718709</AY>
          <AV>800184965</AV>
          <AP/>
          <AO/>
          <AQ/>
          <AN/>
        </da>
        <da>
          <AR>000742024</AR>
          <AW>0</AW>
          <CT>D</CT>
          <CU>A</CU>
          <CH>0032</CH>
          <BY>31-10-2012</BY>
          <CA>25-10-2012</CA>
          <AB>234</AB>
          <AA>234</AA>
          <BS>88754515</BS>
          <AD>Mike Tyson</AD>
          <AC>Mike Tyson</AC>
          <AZ>CZ6521232465</AZ>
          <AE/>
          <CG>A</CG>
          <AL>L</AL>
          <BZ>Mike Tyson</BZ>
          <AH>Some street</AH>
          <AI/>
          <AF>Some city</AF>
          <AK>Kraj</AK>
          <AG>CZ</AG>
          <AJ>885 21</AJ>
          <CR>21-11-2012</CR>
          <AY/>
          <AV>800184965</AV>
          <AP/>
          <AO/>
          <AQ/>
          <AN/>
        </da>
        <detaildc CH="0032" AB="234" BS="11888954" BB="32" BA="CZ" AT="" CI="7077329000002340342" AU="" DU="1Z48395" CB="CZK">
          <dc>
            <AW>0</AW>
            <CT>D</CT>
            <CU>C</CU>
            <BY>31-10-2012</BY>
            <CA>25-10-2012</CA>
            <CV>8151</CV>
            <BT>12111</BT>
            <CJ>1</CJ>
            <AM>0</AM>
            <DR>PC</DR>
            <DS/>
            <DO>25-10-2012</DO>
            <DQ>18:42</DQ>
            <CE>1</CE>
            <BH>8151</BH>
            <CY>8151 SHELL MALKOVICE P</CY>
            <DP>049336</DP>
            <DT/>
            <BQ/>
            <BR>500000</BR>
            <CN>30</CN>
            <CM>030</CM>
            <BO>160,00</BO>
            <BF>38,900</BF>
            <BC>6224,00</BC>
            <BI>32,417</BI>
            <CD>B</CD>
            <BG>0,600</BG>
            <BK>31,817</BK>
            <BJ>0,000</BJ>
            <DI>8</DI>
            <BP>20,00%</BP>
            <CC>CZK</CC>
            <BM>5090,67</BM>
            <BN>1018,13</BN>
            <BL>6108,80</BL>
            <BD>5090,67</BD>
            <BE>1018,13</BE>
            <DW>6108,80</DW>
            <CO>Nafta</CO>
          </dc>
        </detaildc>
        <dt>
          <AR>000742024</AR>
          <AW>0</AW>
          <CT>D</CT>
          <CU>T</CU>
          <CH>0032</CH>
          <BY>31-10-2012</BY>
          <CA>25-10-2012</CA>
          <AB>234</AB>
          <AA>234</AA>
          <BS>11888954</BS>
          <BB/>
          <BA>CZ</BA>
          <DG>1</DG>
          <CN>30</CN>
          <CM>030</CM>
          <DF>160,00</DF>
          <DH>litr</DH>
          <DJ>20,00%</DJ>
          <DD>5090,67</DD>
          <DE>1018,13</DE>
          <DC>6108,80</DC>
          <DB>CZK</DB>
          <DA>P</DA>
          <AX/>
          <CQ/>
          <CP/>
        </dt>
        <dt>
          <AR>000742024</AR>
          <AW>0</AW>
          <CT>D</CT>
          <CU>T</CU>
          <CH>0032</CH>
          <BY>31-10-2012</BY>
          <CA>25-10-2012</CA>
          <AB>234</AB>
          <AA>234</AA>
          <BS>11888954</BS>
          <BB/>
          <BA>CZ</BA>
          <DG>2</DG>
          <CN/>
          <CM/>
          <DF>160,00</DF>
          <DH>litr</DH>
          <DJ/>
          <DD>5090,67</DD>
          <DE>1018,13</DE>
          <DC>6108,80</DC>
          <DB>CZK</DB>
          <DA/>
          <AX/>
          <CQ/>
          <CP/>
        </dt>
        <dt>
          <AR>000742024</AR>
          <AW>0</AW>
          <CT>D</CT>
          <CU>T</CU>
          <CH>0032</CH>
          <BY>31-10-2012</BY>
          <CA>25-10-2012</CA>
          <AB>234</AB>
          <AA>234</AA>
          <BS>11888954</BS>
          <BB/>
          <BA>CZ</BA>
          <DG>19</DG>
          <CN/>
          <CM/>
          <DF/>
          <DH/>
          <DJ/>
          <DD>5090,67</DD>
          <DE>1018,13</DE>
          <DC>6108,80</DC>
          <DB>CZK</DB>
          <DA/>
          <AX/>
          <CQ/>
          <CP/>
        </dt>
        <dt>
          <AR>000742024</AR>
          <AW>0</AW>
          <CT>D</CT>
          <CU>T</CU>
          <CH>0032</CH>
          <BY>31-10-2012</BY>
          <CA>25-10-2012</CA>
          <AB>234</AB>
          <AA>234</AA>
          <BS>11888954</BS>
          <BB/>
          <BA>CZ</BA>
          <DG>8</DG>
          <CN/>
          <CM/>
          <DF/>
          <DH/>
          <DJ/>
          <DD>5090,67</DD>
          <DE>1018,13</DE>
          <DC>6108,80</DC>
          <DB>CZK</DB>
          <DA/>
          <AX/>
          <CQ/>
          <CP/>
        </dt>
      </invoice>
    </account>
</account_group>
<footer>
    <AR>999999999</AR>
    <AW>0</AW>
    <CT>S</CT>
    <CU>T</CU>
    <CZ>SS48</CZ>
    <BU>4</BU>
    <CH>0032</CH>
    <CK>2012-11-01</CK>
    <CL>23:04</CL>
    <CW>225</CW>
    <BX>1</BX>
    <CS>7</CS>
    <BW>0000000000000610880</BW>
</footer>
</etd>sample - not working:
    select x.*
    from os_import_docs d
         ,XMLTABLE('/etd/header'
                    PASSING httpuritype(d.document).getXML()
                    COLUMNS
                       response_status varchar2(50) PATH 'AR'
                    ) x
   where d.object_id = 2587058
     and rownum = 1;
ORA-22835: Buffer too small for CLOB to CHAR or BLOB to RAW conversion (actual: 6196, maximum: 4000)Many thanks,
Tomas

Hello,
many thanks for the reply. Your examples are very usefull for me.
To answer your questions.
An XML structure:
/etd
    /header - repeat in each row in output
    /account_group/account
        /invoice
            /da - repeat for each details under "selected "invoice
            /detaildc/dc - the lowest level
            /detaildn/dn - the lowest level
            /dt - repeat for each details under "selected "invoice
    /footer - repeat in each row in outputI would like to to have a 1 row for each "record" in /detaildc section and include related nodes at higher levels.
Please see below XML file, which is simplified file of example in first post, but includes a complete xml structure which needs to be queried in db.
<?xml version="1.0" encoding="UTF-8"?>
<etd>
<header>
    <AR>000000000</AR>
    <CK>2012-10-31</CK>
    <CF>SS-CZL19</CF>
</header>
<account_group id="234">
    <account id="234">
      <invoice id="EI08P4000">
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          <AR>EI08P4000</AR>
          <AD>Mickey Mouse</AD>
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        <detaildc DU="1Z56655" CB="EUR">
          <dc>
            <DO>16-10-2012</DO>
            <CY>ASFINAG POST_MAUT</CY>
            <BM>1940,60</BM>
            <CO>Dalnicni znamka</CO>
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        </detaildc>
        <detaildc DU="2Z55050" CB="EUR">
          <dc>
            <DO>17-10-2012</DO>
            <CY>ASFINAG POST_MAUT</CY>
            <BM>1328,10</BM>
            <CO>Dalnicni znamka</CO>
          </dc>
        </detaildc>
        <detaildc DU="2Z90001" CB="EUR">
          <dc>
            <DO>27-10-2012</DO>
            <CY>ASFINAG POST_MAUT</CY>
            <BM>185,10</BM>
            <CO>Poplatek</CO>
          </dc>
        </detaildc>
        <dt>
          <AR>EI08P4000</AR>
          <DG>8</DG>
        </dt>
      </invoice>
    </account>
    <account id="234">
      <invoice id="EI13T7777">
        <da>
          <AR>EI13T7777</AR>
          <AD>Mickey Mouse</AD>
        </da>
        <detaildc DU="1Z48302" CB="EUR">
          <dc>
            <DO>26-10-2012</DO>
            <CY>SANEF 07706 A 07704</CY>
            <BM>232,10</BM>
            <CO>Dalnicni poplatek</CO>
          </dc>
        </detaildc>
        <detaildc DU="1Z48302" CB="EUR">
          <dc>
            <DO>20-10-2012</DO>
            <CY>TEST A 07704</CY>
            <BM>30,10</BM>
            <CO>Poplatek</CO>
          </dc>
        </detaildc>
        <dt>
          <AR>EI13T7777</AR>
          <DG>8</DG>
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      </invoice>
    </account>
    <account id="234">
      <invoice id="EI327744">
        <da>
          <AR>EI327744</AR>
          <AD>Mickey Mouse</AD>
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            <BY>30-10-2012</BY>
            <BM>8,10</BM>
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        </detaildn>
        <detaildn CI="707732 00000234" >
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            <BY>30-10-2012</BY>
            <BM>399,50</BM>
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    <account id="234">
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          <dc>
            <DO>19-10-2012</DO>
            <CY>ASFINAG POST_MAUT</CY>
            <BM>7428,10</BM>
            <CO>Dalnicni znamka</CO>
          </dc>
        </detaildc>
        <detaildc DU="1Z56515" CB="EUR">
          <dc>
            <DO>12-10-2012</DO>
            <CY>UK</CY>
            <BM>954,10</BM>
            <CO>Poplatek</CO>
          </dc>
        </detaildc>
        <dt>
          <AR>EI349515</AR>
          <DG>8</DG>
        </dt>
      </invoice>
    </account>
</account_group>
<footer>
    <CZ>SS47</CZ>
    <BU>4</BU>
    <CH>0032</CH>
    <CK>2012-10-31</CK>
    <CL>01:25</CL>
</footer>
</etd>Expected output
AR     CK     CF             AR4             AD             DU     CB     DO             CY                     BM      CO                AR5             DG     CI             BY               BM6     CZ     BU       CH       CK7    CL
0     41213     SS-CZL19     EI08P4000     Mickey Mouse     1Z56655     EUR     16-10-2012     ASFINAG POST_MAUT     1940,60     Dalnicni znamka        EI08P4000     8                                    SS47     4     32     41213     01:25
0     41213     SS-CZL19     EI08P4000     Mickey Mouse     2Z55050     EUR     17-10-2012     ASFINAG POST_MAUT     1328,10     Dalnicni znamka        EI08P4000     8                                    SS47     4     32     41213     01:25
0     41213     SS-CZL19     EI08P4000     Mickey Mouse     2Z90001     EUR     27-10-2012     ASFINAG POST_MAUT      185,10     Poplatek        EI08P4000     8                                    SS47     4     32     41213     01:25
0     41213     SS-CZL19     EI13T7777     Mickey Mouse     1Z48302     EUR     26-10-2012     SANEF 07706 A 07704      232,10     Dalnicni poplatek EI13T7777     8                                    SS47     4     32     41213     01:25
0     41213     SS-CZL19     EI13T7777     Mickey Mouse     1Z48302     EUR     20-10-2012     TEST A 07704               30,10     Poplatek        EI13T7777     8                                    SS47     4     32     41213     01:25
0     41213     SS-CZL19     EI327744     Mickey Mouse                                                                      EI327744          707732 00000234     30-10-2012     8,10     SS47     4     32     41213     01:25
0     41213     SS-CZL19     EI327744     Mickey Mouse                                                                      EI327744          707732 00000234     30-10-2012     399,50     SS47     4     32     41213     01:25
0     41213     SS-CZL19     EI349515     Mickey Mouse     1Z56514     EUR     29-10-2012     ALLAMI AUTOPALYAKEZE     1240,60     Dalnicni znamka        EI349515     8                                    SS47     4     32     41213     01:25
0     41213     SS-CZL19     EI349515     Mickey Mouse     1Z56515     EUR     19-10-2012     ASFINAG POST_MAUT     7428,10     Dalnicni znamka        EI349515     8                                    SS47     4     32     41213     01:25
0     41213     SS-CZL19     EI349515     Mickey Mouse     1Z56515     EUR     12-10-2012     UK                      954,10     Poplatek        EI349515     8                                    SS47     4     32     41213     01:25

How to read the data from a file in another computer with user name and password login

How to read read the data from a file in anohter computer which need to login with user name and password?

duplicate post: http://forums.ni.com/t5/LabVIEW/log-on-the-other-computer-with-user-name-and-password/m-p/2061478
duplicate post: http://forums.ni.com/t5/LabVIEW/do-need-to-enter-the-user-name-and-password-when-TCP-ip/m-p/2061612
duplicate post http://forums.ni.com/t5/LabVIEW/log-on-the-other-computer-with-user-name-and-password/m-p/2060682

How to store the data of a file into an ArrayList?

Hi! everyone.
I want to know
if I have a File, and the data in the file are type int, type String...
And I have a ArrayList which is of type Question
How do I store the data of that file into the ArrayList
I tried to use the while loop(use the hasNextLine() to read the data line by line)
But I cannot add data which are not of type Question to the ArrayList.
Can you tell me what I should do, please?
I also wonder that
The data of the file are of many types, but when I try to read it with the nextLine(), the data all turn out to be of type String. Why?
Thank you.
Edited by: Terry001 on Apr 30, 2008 1:13 PM

No, a line in the file is just part of a question
The format of the file is like this:
*<question type code>                    :     String*
*<question point value>                    :     int*
*<question category>                         :     String*
*<question difficulty level>               :     int*
*<question text>                              :     String*
*<question correct answer>               :     String*
*<optional question-specific data>     :     String*
*<question terminator>                    :     String*
And here is an example
TF //TrueFalseQuestion
5 //points value
None //category
3 //difficulty level
The capital of the United States is Washington, D.C. //question text
True // answer
*** //quetion terminator
I created an ArrayList in the Test class:
private ArrayList<Question> questions; // Create inside constructor
    public Test (String name, String instr)
        testName = name;
        scoreEarned = 0;
        scorePossible = 0;
        instructions = instr;
        questions = new ArrayList<Question>(); //[MAX_NUMBER_OF_QUESTIONS];
    }And I tried to use the following method to store the data of the file to the ArrayList
// This method loads a set of questions from a plain text file
    public void loadQuestionsFromFile(String fileName) throws FileNotFoundException
        try
            File fileReader = new File("input.txt");
            Scanner sc = new Scanner(fileReader);
            while (sc.hasNextLine())
                // I don't know how to pass the data I got from the nextLine() method to the ArrayList because they are of different type
        catch (FileNotFoundException a)
            System.out.println(a);
    }    As all you said, I should create an Question object in the while loop
Question temp = new Question ();But I have no idea how to pass the int and String to the Question object.
Thank you

How to modify existing data in a file help me!!!!!

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