Read from file, line number N?

Could someone post some code or explain how can I read from a file, line number N?
Thanks

this is a simple way but not so professional:
string filename="";// file name
try{
int N=5;// line number to read first line is line 0
File file=new File(filename);
BufferedReader in=new BufferedReader(new FileReader(file));
for(int x=0;x<N;x++){
in.readLine();
String lineN=in.readLine();
catch(..){
Alex

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Loop: reads from file line by line

This works:
String line= f.readLine();
while (line != null) {
System.out.println(line);
line= f.readLine();
However, I want to get rid of the leading and trailing white space, hence
String line= f.readLine().trim();
while (line != null) {
System.out.println(line);
line= f.readLine().trim(); <--error
So, it gives me a NullPointerException. I don't understand why it gives me this exception on the last line that it reads. The last line is not empty, is it?

When in doubt read the API!!!
When you do that you will see that readLine() method on a BufferedReader returns null when it has nothing more to read. So it does read the last line which is non-null, then returns null on the next invocation. You want to test if line is null before assuming it is a String object and trying
to call trim() on it.

Read the file line by line from upload

Hi Guys,
Need help... I creating a web application that has a upload capability. What I want to do is this...
I want to upload a file (but not save it). What I'm going to do is just read the file line by line and save these data to the database. How can I do this? (BTW, I'm using struts (FormFile)).
Please guide me please!
Thanks.

i think u should obtain a inputstream from request object and then save it to the database using BLOB object.

Reading a file line by line from right to left using StringTokenizer

I hope the title caught you attention!!!
I am a little stuck. How can I implement a method that will allow me to read a sentence from right to left when reading from file.
Ex.
IX: Series      {2}
IX: {Series!geometric|(}      {4}
IX: {Euler's constant}      {4}
IX: {Series!geometric|)}      {4}
IX: {Series!arithmetic|(}      {4}
IX: {Series!arithmetic|)}      {5}
IX: {Series!harmonic|(}      {5}
IX: {Euler's constant}      {5}
IX: {Series!harmonic|)}      {5}
IX: Series      {5}
So for example in the first row we have
IX: Series      {2}
and what the output should show be is
Series: 2
What happens in the background is that I created an entry for a TreeMap which will be display at the end.
Thanks for your time and appreciate your help kindly.

Well, as a left-to-right start:
public class TopicInputReader extends BufferedReader {
    public static final int STARTTOPIC = 0;
    public static final int ENDTOPIC   = 1;
    public static final int SUBTOPIC   = 2;
    // Instead of making Topic members public, you should make accessors.
    // Didn't feel like typing.
    public class Topic {
        public int    type; // STARTTOPIC, ENDTOPIC, or SUBTOPIC
        public String name;
        public String parent;
        public int    page;
    public TopicInputReader (Reader in) {
        super(in);
    public TopicInputReader (Reader in, int sz) {
        super(in, sz);
    public Topic readTopic () throws IOEXception {
        String          line;
        Topic           topic;
        StringTokenizer tokens;
        String          token;
        line = readLine();
        if (line = null) throw new EOFException();
        tokens = new StringTokenizer(line);
        topic.parent = "".intern();
        // Note: If StringTokenizer isn't appropriate for you, you
        // can use a StringReader in conjunction with a StreamTokenizer.
        // Ex: token = new StreamTokenizer(new StringReader(line));
        // TODO: Set up tokenizer parameters here.
        while (tokens.hasMoreTokens()) {
            token = tokens.nextToken(appropriate_delimiter);
            // TODO: Fill in 'topic' fields here.
            // Keep in mind, since you're reading left-to-right and you don't
            // know if a particular string is going to be a topic name or a
            // sub topic, you can always just read a topic name into topic.name
            // and, when you encounter a new topic name:
            //    topic.parent += ('!' + topic.name);
            //    topic.name = token;
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};I definitely have not tested that... or even double-checked it.
Although... the format of your topic list file does lend itself well to right-to-left parsing. Since you are insisting, I suggest reversing the string and using a StringTokenizer (or a StreamTokenizer and a StringReader):
    BufferedReader r = new BufferedReader(new InputStreamReader(myInputStream));
    String          line, revline;
    StreamTokenizer tokens;
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        revline = (new StringBuffer(line)).reverse().toString();
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        // Parse tokens here.
    };Jason

What is the best way to read a file line by line?

Hello, everyone!
I want to read a file line by line, i.e. each time, a line of a text file is read and stored as a String object and the String object will be manipulated (parsed) later.
I have found that FileInputStream does not have a function which is responsible for reading a line each time from a text file. Anyone have good suggestions?
Best regards,
George

I always use the following example.. mayb that would help you as well
File fid = new File(fileName);
if (fid.exists())
        fr = new FileReader(fid);
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SapScript, How do I read the current line number?

I have sections of text - each in it's own element with an 'include' of the standard text.
These sections are variable in size.
All elements are in the MAIN window.
I do not want a paragraph to split over two pages.
How do I read the current line number within the sapscript before the section prints so I can issue a new-page command at the beginning of the paragraph?
Thanks!

Yes, that does work for paragraphs.
If I have multiple elements to print from within a loop where "at first, at each and at last" each call the Sapscript funtcion write_form - how can I keep the whole section together. protect/endprotect will keep each element together but not the group of elements.
There must be a way to find the current line number.

Error reading from file glibc-2.5-24.i686.rpm RHEL 5 Setup stuck at 80%

Hi, I am installing Oracle 10g on RHEL 5 (Red Hat Enterprise Linux 5) machine I am facing two problems
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Error reading from file glibc-2.5-24.i686.rpm
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I have 3 GB ram and 320GB hard drive I am not sure what to put in the swap memory and other settings i blindly followed instructions given here
http://www.oracle-base.com/articles/10g/OracleDB10gR2InstallationOnRHEL5.php
What could be the problem where do I find the error log if its created
Please help me
Thanks
Edited by: 891355 on Nov 6, 2011 12:06 PM

I found the installActions file in the installer folder and I think this could be the problem
INFO: The 'shiphomeproperties.xml' file is missing from shiphome location '/home/oracle/Desktop/database/install/../stage/products.xml.' Add this file to the 'Disk1/stage' directory of the shiphome.
though I am attaching the log file for more details do you think the installer is corrupt :(
InstallActions log file ==> http://www.mediafire.com/?nh7mx7bxqht9ovu
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[Error] Microsoft SQL Server 2008 Setup. Error reading from file msdbdata.mdf

Hi all
I'm trying to install SQL 2008 Express on my Computer: Hp compact DX7300 Slim tower.
and get this error:
TITLE: Microsoft SQL Server 2008 Setup
The following error has occurred:Error reading from file d:\8268cd7b247d294de359c9\x86\setup\sql_engine_core_inst_msi\PFiles\SqlServr\MSSQL.X\MSSQL\Binn\Template\msdbdata.mdf. Verify that the file exists and that you can access it.
Click 'Retry' to retry the failed action, or click 'Cancel' to cancel this action and continue setup.
For help, click: http://go.microsoft.com/fwlink?LinkID=20476&ProdName=Microsoft+SQL+Server&EvtSrc=setup.rll&EvtID=50000&ProdVer=10.0.1823.0&EvtType=0xF45F6601%25401201%25401
Log file
Overall summary:
Final result: SQL Server installation failed. To continue, investigate the reason for the failure, correct the problem, uninstall SQL Server, and then rerun SQL Server Setup.
Exit code (Decimal): -2068643839
Exit facility code: 1203
Exit error code: 1
Exit message: SQL Server installation failed. To continue, investigate the reason for the failure, correct the problem, uninstall SQL Server, and then rerun SQL Server Setup.
Start time: 2014-12-09 23:22:03
End time: 2014-12-09 23:40:28
Requested action: Install
Log with failure: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20141209_232121\sql_engine_core_inst_Cpu32_1.log
Exception help link: http://go.microsoft.com/fwlink?LinkId=20476&ProdName=Microsoft+SQL+Server&EvtSrc=setup.rll&EvtID=50000&ProdVer=10.0.1823.0
Machine Properties:
Machine name: VISTA-PC
Machine processor count: 2
OS version: Windows Vista
OS service pack: Service Pack 1
OS region: United States
OS language: English (United States)
OS architecture: x86
Process architecture: 32 Bit
OS clustered: No
Product features discovered:
Product Instance Instance ID Feature
Language Edition Version Clustered
Package properties:
Description: SQL Server Database Services 2008
SQLProductFamilyCode: {628F8F38-600E-493D-9946-F4178F20A8A9}
ProductName: SQL2008
Type: RTM
Version: 10
SPLevel: 0
Installation location: d:\8268cd7b247d294de359c9\x86\setup\
Installation edition: EXPRESS
User Input Settings:
ACTION: Install
ADDCURRENTUSERASSQLADMIN: False
AGTSVCACCOUNT: NT AUTHORITY\NETWORK SERVICE
AGTSVCPASSWORD: *****
AGTSVCSTARTUPTYPE: Disabled
ASBACKUPDIR: Backup
ASCOLLATION: Latin1_General_CI_AS
ASCONFIGDIR: Config
ASDATADIR: Data
ASDOMAINGROUP: <empty>
ASLOGDIR: Log
ASPROVIDERMSOLAP: 1
ASSVCACCOUNT: <empty>
ASSVCPASSWORD: *****
ASSVCSTARTUPTYPE: Automatic
ASSYSADMINACCOUNTS: <empty>
ASTEMPDIR: Temp
BROWSERSVCSTARTUPTYPE: Disabled
CONFIGURATIONFILE: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20141209_232121\ConfigurationFile.ini
ENABLERANU: True
ERRORREPORTING: False
FEATURES: SQLENGINE,REPLICATION
FILESTREAMLEVEL: 0
FILESTREAMSHARENAME: <empty>
FTSVCACCOUNT: <empty>
FTSVCPASSWORD: *****
HELP: False
INDICATEPROGRESS: False
INSTALLSHAREDDIR: C:\Program Files\Microsoft SQL Server\
INSTALLSHAREDWOWDIR: C:\Program Files\Microsoft SQL Server\
INSTALLSQLDATADIR: <empty>
INSTANCEDIR: C:\Program Files\Microsoft SQL Server\
INSTANCEID: SQLExpress
INSTANCENAME: SQLEXPRESS
ISSVCACCOUNT: NT AUTHORITY\NetworkService
ISSVCPASSWORD: *****
ISSVCSTARTUPTYPE: Automatic
MEDIASOURCE: d:\8268cd7b247d294de359c9\
NPENABLED: 0
PID: *****
QUIET: False
QUIETSIMPLE: False
RSINSTALLMODE: FilesOnlyMode
RSSVCACCOUNT: <empty>
RSSVCPASSWORD: *****
RSSVCSTARTUPTYPE: Automatic
SAPWD: *****
SECURITYMODE: <empty>
SQLBACKUPDIR: <empty>
SQLCOLLATION: SQL_Latin1_General_CP1_CI_AS
SQLSVCACCOUNT: NT AUTHORITY\NETWORK SERVICE
SQLSVCPASSWORD: *****
SQLSVCSTARTUPTYPE: Automatic
SQLSYSADMINACCOUNTS: VISTA-PC\VISTA
SQLTEMPDBDIR: <empty>
SQLTEMPDBLOGDIR: <empty>
SQLUSERDBDIR: <empty>
SQLUSERDBLOGDIR: <empty>
SQMREPORTING: False
TCPENABLED: 0
X86: False
Configuration file: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20141209_232121\ConfigurationFile.ini
Detailed results:
Feature: Database Engine Services
Status: Failed: see logs for details
MSI status: Passed
Configuration status: Passed
Feature: SQL Server Replication
Status: Failed: see logs for details
MSI status: Passed
Configuration status: Passed
Rules with failures:
Global rules:
Scenario specific rules:
Rules report file: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20141209_232121\SystemConfigurationCheck_Report.htm
I will very appriciate if someone can help me solve it. I was trying to set Full control for my account in Properties/Security of root folder and try again but error is still.
Many thanks

Hi Foreverduy,
Before you run SQL Server 2008 express setup, make sure that you have installed Windows installer 4.5 and.NET Framework 3.5 SP1 manually. For more information about the process, please refer to the article:
http://msdn.microsoft.com/en-us/library/ms143506(v=sql.100).aspx. Moreover, please turn off all the third-party softwares which could prohibit the installation process.
According to your error message, the issue could be due to that your account has no rights to install SQL Server, or the corruption on the media.
Firstly, please ensure that your account has admin rights. Also make sure that you right-click the setup.exe and choose “Run as administrator” to complete the installation.
Secondly, please check if "msdbdata.mdf" file exists at d:\8268cd7b247d294de359c9\x86\setup\sql_engine_core_inst_msi\PFiles\SqlServr\MSSQL.X\MSSQL\Binn\Template. If it exists, please make sure that your account has read permission to the extracted
folder.
However, if the file doesn't exist in the extraction, the media could be corrupt. Please download the
media
again and check if the issue still occurs.
Regards,
Michelle Li

Adobe Illustrator CS4 Error: Error 1603. Error 1305.Error reading from file C:\Program Files\Adobe\Adobe Illustrator CS4\Support Files\Required\Fonts\AdobeSongStd-Light.otf. Verify that the file exists and that you can access it. AdobeColorCommonSetRGB

Iam trying to load illustator in my PC i get following error while loading Application CD 2
Adobe Illustrator CS4
Error:
Error 1603. Error 1305.Error reading from file C:\Program Files\Adobe\Adobe Illustrator CS4\Support Files\Required\Fonts\AdobeSongStd-Light.otf. Verify that the file exists and that you can access it.
AdobeColorCommonSetRGB
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Error 2.
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How to read a file line by line in UTL

Hi All,
DECLARE
fileID UTL_FILE.FILE_TYPE;
strbuffer VARCHAR2(100);
BEGIN
fileID := UTL_FILE.FOPEN ('DR', 'New.txt', 'R');
UTL_FILE.GET_LINE (fileID, strbuffer);
dbms_output.put_line(strbuffer);
END;
By this program I can read only first line of the file. I want to read the file line by line.
Thanks
Sunil

try this
DECLARE
    fileID UTL_FILE.FILE_TYPE;
    strbuffer VARCHAR2(100);
BEGIN
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Hello,
I know that there are already many posts regarding the question I m about to ask. But, I somehow dont seem to achieve what I want using the suggestions given in the other posts.
My problem is that, I have a file with the first column as a time stamp containing hour, minute, second and millisecond. The second column in a set of pressure values. I want to plot a graph of these pressure values against the timestamp recorded in this .txt file. Whatever I do, the timestamp values seem to skip by a couple of seconds.
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Hey, I was having a similar issue the other day. The first problem I had was how to open the file and actually get the timestamp information. Since I'm using LabView 8.0, I had to go into Read Spreadsheet File and create a new vi to open strings (in an array form). That's the Read Spreadsheet File (string) vi below. Then, I had to figure out how to convert the string of a timestamp to something meaningful to me. The Timestamp2.vi is how I did that below. I'm also including a little test file. So, to run Timestamp2.vi, you will have to input the right base path, and have the Read Spreadsheet File (string).vi in the same place as Timestamp2. Hope that helps. I think I'm finally getting this stuff, so let me know if it doesn't work.
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Test.txt ‏1 KB
Timestamp2.vi ‏28 KB
Read From Spreadsheet File (String).vi ‏25 KB

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I'm trying to connect to a web service as outlined by the book "Creating Dynamic Forms with Adobe LiveCycle Designer" which is an excellent book by the way.
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I've successfully created the Data Connection to
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I dragged and dropped the bookTitle, chapter & Versie onto the form. I also dragged and dropped the GetBibleWordsByChapterAndVerseResult and the GetBibleWordsByChapterAndVerseBtn.
I Preview PDF and click the button I get the above error.
Does anyone have experience using Web Services with Adobe LiveCycle ES and have advice on how to resolve this. Any Suggestions would be greatly appreciated.
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I noticed that when I clicked on the button on the form, the error message would pop up from Acrobat, but when I check the log file, there was NO entry. This means that Acrobat failed before it could execute the method.
Here is the web method:
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not you entered a 'T' or 't'.")]
public string TF(string Tf)
string result="False";
if(Tf.Substring(0,1).ToLower()=="t"){
result= "True";}
LogFile.Write("Sent: "+result);
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How to read text file line by line...?

how to read text file line by line, but the linefeed is defined by user, return list of string, each line of file is a item of list?
please help me.
Thanks very much

Brynjar wrote:
In Groovy, you would do something like:
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My file has insert command and i want to read that file line by line in sql

myfile.txt
insert into emp values(100,200,"sumedh",11);
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insert into emp values(102,200,"sam",11);
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Why did you begin this thread in security.
just like
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Reading a file line by line and executing the code

I need to read a file line by line and execute them simultaneously.
I use BufferedReader for reading , but for executing i tried a lot , but could not find a solution.
Kindly help and try to brief me.

If you're hoping to execute lines of java source code on the fly...then forget it. Java is a compiled language. It doesn't have an "eval" statement like other languages.
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Read from file, line number N?

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