Read Specific value/Search Into file

Hi i need a java code which read specific value from a file.
Example:
I have a text file named data.txt
it contain :
Customer Name :Sarwar
Customer Id : 001
Product Price :2000
now how can i take values 001 and 2000 from the file data.txt and save them in a another text file named new_data.txt ?
Can any one help me?

Search Google for 'java file read'. Wanna write to a file? Search for 'java file write'. Ain't Google awesome?
If you haven't already done so, I suggest you search www.amazon.com for a beginner book on Java that has good reviews. Its much more efficient to read a book on Java than spend countless hours trying to learn it through code examples found on the internet.

Similar Messages

How to read specific line in a file through UNIX shell script..

Dear Friends,
I have generated .ldt file under admin/import/US folder through FND_LOAD script for Download the responsibility.
I registred Shell script (Host concurrent program) in Oracle apps. Now i want to read the file in speciific line which i was generated in admin/import/US folder through unix shell script. Please help me how to read specific line and the i want to replace that which i am going to read the specific line.
Thanks in advance..
Regards,
Velu.

Hi,
Thanks for reply,
My requirement i have to find the specific line in a file and find and replace needed word over there it's should happen programatically. i want to read specific line in a file Once complete find and replace the condition should exists. The loop will go to next file and read the same line in next file also do the same process upto how many files over there.i am doing through UNIX shell script. Please help me out to find the
Your suggestion is highly appriciated.
Thanks,
Velu.

Overwrite specific value on .txt file

Hello
Does any one know how to overwrite specific values in a .txt file?
here's and example of what i need:
I just want to replace the numbers 1 and 2 every time I run my code, the rest remain the same.
this is the part of the code Im using
thanks!

Hello Tokighy,
What Bryan mentions is a good approach, you can also check the Write to Text File and Read from Text File.vi in the Find Examples section in LabVIEW, you can take the output from the Read from Text File (having as input your .txt file) and then use either Replace Substring or Search and Replace String functions from the String palette.
http://zone.ni.com/reference/en-XX/help/371361H-01/glang/search_and_replace_string/
http://zone.ni.com/reference/en-XX/help/371361J-01/glang/replace_substring/
Hope you find this information useful!
Regards,

Very slow painting while reading and writing doubles into file

for 15MB length file i = 7662080
for 50MB length file i = 12414368
Part of Code for writing into file follows like this:
try{
fos = new FileOutputStream("Angel.txt");
File f = new File("Angel.txt");
     if(f.length() >=4)
     f.delete();
fos = new FileOutputStream("Angel.txt");
dos = new DataOutputStream(new BufferedOutputStream(fos,1000000));
int x=0;
double y_last, y_new;
for(int j=0 ;j<i ;j++)
if(some condition)
y_new = ....;
try{
//previously in vectors
y_last = y_new;
vect.add(new Line2D.Double(x, y_last, x, y_new)_;
dos.writeDouble(y_new);
     }catch(Exception e){System.out.println(e);}
dos.close();
fos.close();
x++;
}catch(Exception excp){System.out.println(excp);}
part of code for reading from file follows like this:
public void paint(Graphics g)
try{
     double y1, y2 =0;
     Line2D.Double doub;
     raf = new RandomAccessFile("Angel.txt","r");
     dis = new DataInputStream(new BufferedInputStream(new FileInputStream(raf.getFD(),1000000)));
     raf.seek((rect.x*8));
     for (int i = 0/any value; (i < value as per choice); i++)
          g2.setStroke(new BasicStroke(0)); //2
          y1 = y2;
     y2 =dis.readDouble();
          doub=new Line2D.Double(i,y1,i,y2);
          g2.draw(doub);
dis.close();
     raf.close();
}catch(Exception excp){System.out.println(excp);}
I tried using Object Streams but NotSerializable Exception is thrown as Line2D.Double objects
are not serialized.
Any idea to make reading and writing into file specially from MB files faster is appreciated.

Why are you reading in the file in the paint method ?
Create your data once before painting.
I think you should explain what is your goal and what behavior you want.
Denis

Re-read in values in measurement file when file is updated

Hi,
I'm trying to control a power supply with labview and set the voltage. I've currently got it working reading in a measurement file and setting it to the value within the file. I'm now having the issue that I would like to update this value when the file is changed, as in read the file again when it is updated and set the new voltage. I've tried several things but if I put the file within the while loop then it reads it once and then returns 0 following the first loop. Outside the while loop it only reads the initial value.
I'm quite new to labview so any help would be much appreciated.
Thanks,
E
Solved!
Go to Solution.

You might want to explain your application a little better. Looking for a file to change to set an instrument does not seem like a good idea. Who is changing the file? How often is the file changed?
A better way might be to use a queue or notifier for setting the instrument.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

Reading Design values from readback file

Hi All,
I am trying to understand the process of reading back design signal values from readback file.
I have both the .ll file and the readback.bin file
To get the readback file, I executed the below command:
% readback_hw_device [current_hw_device] -readback_file <filename.rbd> -bin_file <filename.bin>
Now, I want to know the command or process to read the design signal values from this .bin file? Is there any command provided by Xilinx or anything else that I can do to read the signal values?
Rgds
Sapan

Hi Syed,
Thanks for the reply. It was actually my own started thread. I had few questions unanswered from that post:
Question:
The procedure for readback that I am following here is based on the ug908-vivado programming and debugging.
I first uploaded the image on FPGA and then I executed the following commands in Vivado Hardware Manager
% create_hw_bitstream -hw_device [current_hw_device] -mask fpga.msk fpga.bit
% verify_hw_devices [current_hw_device] #### For readback verify
readback_hw_device [current_hw_device] -readback_file <filename.rbd> -bin_file <filename.bin> #####for readback capture
This looks a little different from the one suggested in your document. Can you please confirm if my steps are correct?
Using the above procedure, I did not have to explicitly send readback commands to the FPGA using JTAG as mentioned in doc:
http://www.xilinx.com/support/documentation/sw_manuals/xilinx2015_1/ug908-vivado-programming-debugging.pdf
However the other doc http://www.xilinx.com/support/documentation/application_notes/xapp1230-configuration-readback-capture.pdf mentions sending commands to the device in order to be able to do a readback.
So I am a little confused which one is correct?
Also which document will give the words per frame information for FPGA XC7VX485TFFG1761?
Rgds
Sapan

Read specification cluster from LVM file

Does anyone have a clever solution to programmatically read limit specification masks (for waveform limit tests) from an LVM file?
I used the "Mask and Limit Testing" Express VI to create the masks, which I saved as LVM using the save-data feature.
I don't want to use the Express VI to do the actual test because the testing is in a subVI that's called within a loop; each iteration of the loop needs to send different masks to the Limit Test.vi that's in my subVI.
Thanks,
-a
Solved!
Go to Solution.

Hi Andy,
The LVM is a text file so you can read that in using read file function.
After that I search the string to find where the data starts using Match Pattern
You then process the remainder of the file string and then use Speadsheet String to Array with a tab as its delimiter.
There are tabs at the start of each line and extra line-feed at the end so I used array subset to avoid those areas. This might not work each time but you can fix that when you run into a problem.
cheers
David
Message Edited by David Crawford on 11-05-2009 10:01 PM
Attachments:
Read Mask And Limit Checl LVM File.vi ‏13 KB
Read Mask And Limit Checl LVM File.png ‏30 KB

Efficient string search into files

Hello, i wrote an application that search a string into several files. At the moment i perform the search looping each files, opening them with new BufferedReader(new FileReader), using .readLine() method to get each line and .indexOf >= 0 to check if the line contains the string to search.
Is there a more efficient way to do it? Maybe using Scanner class or what else? HasMap? thanks in advance for the replies

To search for a string in a file you do not have much choice but to read the file and search the characters for the given string.
If you only need to find the first occurrence of the string then obviously you want to stop reading the file when you have found it (unless you need to do something with the rest of the file). Using a large buffer size might help the reading efficiency of the process. You might check out java.nio for some more efficient ways of reading streams in general.
I don't see how a HashMap would help with this process unless you need do something along the lines of counting occurrences of multiple strings.
If all you want to do is search for a string then I am not sure what you would gain using the Scanner class.

Reading specific part of a file

Hi
Im trying to design a java program that reads a txt file such as the one below:
0 400 450 510 670 493 958
1 500 560 630 5633
2 625 676 740
3 1000 1250 1600
4 432
5 2435 235 2654
Then through a user prompt, outputs a specific number from a specific line to the user, i.e.
Line 1
Column 3
Would print 450
i have little knowledge of java, and im not sure if i need to read the whole file into arrays or i can get java just to read a specific line and column from it
i have tried using arrays but as the txt file can be of any size it got confusing!
Please help!
Thanks to you all

jverd is right.. you can use string tokenizer to seperate the columns of data via spaces.. or whatever you wanna specify. I'm seriously bored, so I wrote a working example for you that uses the data you posted
import java.util.*;
import java.io.*;
// usage:
// java Example <line> <column>
public class Example {
     public Example(int line,int col) throws IOException {
          col++; // because StringTokenizer will also count the first number of the actual line
          // example.txt has the data you posted...
          BufferedReader b = new BufferedReader(new InputStreamReader(new FileInputStream("example.txt")));
          String s = "",data = "";
          int j;
          while ((s = b.readLine()) != null) {
               if (Integer.parseInt(""+s.charAt(0)) == line) { // matches line
                    StringTokenizer st = new StringTokenizer(s); // separates words by space character
                    if (st.countTokens() < col) {
                         System.out.println("invalid column for line "+line+". there are only "+(st.countTokens()-1)+" columns on this line.");
                         System.exit(0);
                    // skip to the column..
                    for (j = 0;j < col;j++) data = st.nextToken();
                    System.out.println(data);
     public static void main(String[] args) {
          if (args.length < 2) System.out.println("use java Example <line> <column>");
          else try {
               new Example(Integer.parseInt(args[0]),Integer.parseInt(args[1]));
          catch (NumberFormatException e) {
               System.out.println("line and column need to be a number");
          catch (IOException e) {
               e.printStackTrace();
}

Replace environment specific values in xsl file.

My xml has source and target, whose values depend on the enviroment. I have used "Set Text" to assign the values for these elements. I am using SOA 11g, bpel process.
But since these are environment specific, I need to change them when porting to different env. I read that "SOAConfigPlan" wouldn't
work on xslt.
How can I achieve this?
Edited by: user10367892 on Oct 8, 2010 3:45 PM

My xml has source and target, whose values depend on the enviroment. I have used "Set Text" to assign the values for these elements. I am using SOA 11g, bpel process.
But since these are environment specific, I need to change them when porting to different env. I read that "SOAConfigPlan" wouldn't
work on xslt.
How can I achieve this?
Edited by: user10367892 on Oct 8, 2010 3:45 PM

Reading specific lines in a file

hI
i need to write a program which has a file name a.txt the contents in the file is
SELECT DISTINCT D.MENUNAME, D.MENULABEL, D.MENUSEP, D.MENUORDER FROM PSMENUDEFN D, PSAUTHITEM A, PSOPRCLS C WHERE D.INSTALLED = 1 AND D.MENUGROUP = :1** AND D.MENUNAME = A.MENUNAME AND A.AUTHORIZEDACTIONS > 0 AND A.CLASSID = C.OPRCLASS AND C.OPRID = :2** ORDER BY D.MENUORDER, D.MENUNAME
Bind-1 length=21 value=&Administer Workforce
Bind-2 length=6 value=NLWAJP
I need to read the file in such a way that in the SQL statement in the place of ":1" I need to get Bind-1 value i.e., &Administer Workforce and same with :2 I need to get Bind 2 value NLWAJP
Output must be like this
SELECT DISTINCT D.MENUNAME, D.MENULABEL, D.MENUSEP, D.MENUORDER FROM PSMENUDEFN D, PSAUTHITEM A, PSOPRCLS C WHERE D.INSTALLED = 1 AND D.MENUGROUP = &Adminster Workforce AND D.MENUNAME = A.MENUNAME AND A.AUTHORIZEDACTIONS > 0 AND A.CLASSID = C.OPRCLASS AND C.OPRID = NLWAJP ORDER BY D.MENUORDER, D.MENUNAME

thomas.behr wrote:
Read in your text file line by line, then replace \*XXX\*:Y** with the appropriate value using regular expressions.
Phani532 wrote:The above answers doesnot answer my question....
I am putting my question in refined format...Wrong. import java.io.BufferedReader;
import java.io.IOException;
import java.io.StringReader;
import java.util.List;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Map;
import java.util.HashMap;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public class Test {
private static final String DEFAULT_TEXT =
"SELECT DISTINCT D.MENUNAME, D.MENULABEL, D.MENUSEP, D.MENUORDER FROM PSMENUDEFN D, PSAUTHITEM A, PSOPRCLS C WHERE D.INSTALLED = 1 AND *D.MENUGROUP = *:1** AND D.MENUNAME = A.MENUNAME AND A.AUTHORIZEDACTIONS > 0 AND A.CLASSID = C.OPRCLASS AND *C.OPRID = *:2** ORDER BY D.MENUORDER, D.MENUNAME\n" +
"Bind-1 length=21 value=&Administer Workforce\n" +
"Bind-2 length=6 value=NLWAJP";
public static void main( String[] args ) {
    final List<String> lines = new ArrayList<String>();
    try {
      BufferedReader br = null;
      try {
        br = new BufferedReader(new StringReader(DEFAULT_TEXT));
        String line;
        while ((line = br.readLine()) != null) {
          lines.add(line);
      } finally {
        if (br != null) {
          br.close();
    } catch (IOException ioe) {
      lines.clear();
      ioe.printStackTrace();
    if (!lines.isEmpty()) {
      Collections.sort(lines, new Comparator<String>() {
        public int compare( final String s1, final String s2 ) {
          if (s1.startsWith("Bind-")) {
            if (s2.startsWith("Bind-")) {
              return s1.compareTo(s2);
            } else {
              return -1;
          } else {
            if (s2.startsWith("Bind-")) {
              return 1;
            } else {
              return s1.compareTo(s2);
      final Map<String, String> parameters = new HashMap<String, String>();
      for (String line : lines) {
        if (line.startsWith("Bind-")) {
          parameters.put(line.substring(5, line.indexOf(' ')), line.substring(line.indexOf("value=") + 6));
        } else if (line.startsWith("SELECT ")) {
          final Matcher matcher = Pattern.compile("\\*(.*?)\\*:([\\d]*?)\\*\\*").matcher(line);
          final StringBuilder sb = new StringBuilder();
          int last = 0;
          while (matcher.find()) {
            final int idx = matcher.start();
            if (idx > last) {
              sb.append(line.substring(last, idx));
            sb.append(matcher.group(1));
            sb.append(parameters.get(matcher.group(2)));
            last = matcher.end();
          if (last < line.length()) {
            sb.append(line.substring(last));
          System.out.println(sb.toString());
}(Lucky you, I'm feeling generous - and eager to code.)

How to read specific value in XML using AppleScript?

I have a XML file which I get from Mediainfo, and I want to get the value of Format of the Audio Track from it (In this case, ALAC) using AppleScript. Could anybody help me with this? Thanks.
<?xml version="1.0" encoding="UTF-8"?>
<Mediainfo version="0.7.69">
<File>
<track type="General">
<Complete_name>/Volumes/Macintosh HDD/Movies/Strike the Blood 12.mov</Complete_name>
<Format>MPEG-4</Format>
<Format_profile>QuickTime</Format_profile>
<Codec_ID>qt </Codec_ID>
<File_size>1.64 GiB</File_size>
<Duration>23mn 41s</Duration>
<Overall_bit_rate_mode>Variable</Overall_bit_rate_mode>
<Overall_bit_rate>9 887 Kbps</Overall_bit_rate>
<Movie_name>[ReinForce] Strike the Blood - 12 (BDRip 1920x1080 x264 FLAC)</Movie_name>
<Encoded_date>UTC 1904-01-01 00:00:00</Encoded_date>
<Tagged_date>UTC 1904-01-01 00:00:00</Tagged_date>
<Writing_application>Lavf55.33.100</Writing_application>
</track>
<track type="Video">
<ID>1</ID>
<Format>AVC</Format>
<Format_Info>Advanced Video Codec</Format_Info>
<Format_profile>[email protected]</Format_profile>
<Format_settings__CABAC>Yes</Format_settings__CABAC>
<Format_settings__ReFrames>4 frames</Format_settings__ReFrames>
<Codec_ID>avc1</Codec_ID>
<Codec_ID_Info>Advanced Video Coding</Codec_ID_Info>
<Duration>23mn 41s</Duration>
<Bit_rate>9 084 Kbps</Bit_rate>
<Width>1 920 pixels</Width>
<Height>1 080 pixels</Height>
<Display_aspect_ratio>16:9</Display_aspect_ratio>
<Frame_rate_mode>Variable</Frame_rate_mode>
<Frame_rate>23.976 fps</Frame_rate>
<Color_space>YUV</Color_space>
<Chroma_subsampling>4:2:0</Chroma_subsampling>
<Bit_depth>8 bits</Bit_depth>
<Scan_type>Progressive</Scan_type>
<Bits__Pixel_Frame_>0.183</Bits__Pixel_Frame_>
<Stream_size>1.50 GiB (92%)</Stream_size>
<Writing_library>x264 core 142</Writing_library>
<Encoding_settings>cabac=1 / ref=4 / deblock=1:-2:-2 / analyse=0x3:0x113 / me=umh / subme=9 / psy=1 / psy_rd=0.70:0.00 / mixed_ref=0 / me_range=32 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=32 / lookahead_threads=5 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=9 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=16.0 / qcomp=0.70 / qpmin=10 / qpmax=20 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00</Encoding_settings>
<Language>English</Language>
<Encoded_date>UTC 1904-01-01 00:00:00</Encoded_date>
<Tagged_date>UTC 1904-01-01 00:00:00</Tagged_date>
</track>
<track type="Audio">
<ID>2</ID>
<Format>ALAC</Format>
<Codec_ID>alac</Codec_ID>
<Codec_ID_Info>Apple Lossless Audio Codec</Codec_ID_Info>
<Duration>23mn 41s</Duration>
<Duration_LastFrame>-51ms</Duration_LastFrame>
<Bit_rate_mode>Variable</Bit_rate_mode>
<Bit_rate>799 Kbps</Bit_rate>
<Channel_s_>2 channels</Channel_s_>
<Channel_positions>Front: L R</Channel_positions>
<Sampling_rate>48.0 KHz</Sampling_rate>
<Bit_depth>16 bits</Bit_depth>
<Stream_size>135 MiB (8%)</Stream_size>
<Language>11</Language>
<Encoded_date>UTC 1904-01-01 00:00:00</Encoded_date>
<Tagged_date>UTC 1904-01-01 00:00:00</Tagged_date>
</track>
</File>
</Mediainfo>

Hello
You may try something like the following script. It is indeed a Perl script wrapped in AppleScript, though.
set f to (choose file with prompt "Choose the XML file")'s POSIX path
get_audio_format(f)
on get_audio_format(f)
        string f : POSIX path of source XML file
    do shell script "/usr/bin/perl -CSDA -w <<'EOF' - " & f's quoted form & "
use strict;
use XML::LibXML;
my $parser = XML::LibXML->new();
my $doc = $parser->parse_file($ARGV[0]);
print $doc->find('/Mediainfo/File/track[@type=\"Audio\"]/Format');
EOF"
end get_audio_format
And a littel more general-purpose script is -
set f to (choose file with prompt "Choose the XML file")'s POSIX path
get_value_at_xpath(f, "/Mediainfo/File/track[@type=\"Audio\"]/Format")
on get_value_at_xpath(f, xpath)
        string f : POSIX path of source XML file
        string xpath : XPath of target node
    do shell script "/usr/bin/perl -CSDA -w <<'EOF' - " & f's quoted form & " " & xpath's quoted form & "
# $ARGV[0] : xml file
# $ARGV[1] : xpath
use strict;
use XML::LibXML;
my $parser = XML::LibXML->new();
my $doc = $parser->parse_file($ARGV[0]);
print $doc->find($ARGV[1]);
EOF"
end get_value_at_xpath
Hope this may help,
H
PS. If copied code has extra spaces in front of every line, which appears to be the case with some browsers including Firefox, please remove them before running the script.

Reading HashMap Values From a File

Hi,
I haven't done file I/O in quite a while, so I'm a little rusty.
I have a HashMap<TreePath, Entity> that I need to store persistently. Thus far I have been creating a new HashMap every time a new session starts and populating it with Entity objects that I create from JDBC ResultSets. The TreePath is generated by adding each Entity object to its parent in the JTree. That all works well.
Now I'm trying to write the HashMap to file using ObjectOutputStream. Basically I want to be able to load the JTree (which does not need to be persistent at this stage), and as I load it I get the TreePath of each TreeNode. If that TreePath is a key in the persistent HashMap, then I want to display the details stored in the corresponding Entity. However, when I try to read the HashMap using an ObjectInputStream, I get a NullPointer.
I'm not sure whether the problem is in the way I'm trying to write or read the HashMap, or both. I've followed the examples in the API but they don't seem to be doing the job.
Any suggestions?

I have isolated the problem.
HashMap<TreePath, Entity> map = memory.getMap();
TreePath nodePath = new TreePath(node.getPath()); //where node is a DefaultMutableTreeNode
System.out.println("1. Desired key is: " + nodePath);
System.out.println("2. Map contains key: " + map.containsKey(nodePath));
System.out.println("3. Keys in map: " + map.keySet().toString());When I use a volatile Java object to store the map, an example of the output produced by the following code is:
1. Desired key is: [DW, Acct]
2. Map contains key: true
3. Keys in map: [[DW], [DW, Acct]]
However, when I use file I/O to make the Java object permanent, an example of the output produced by the following code is:
1. Desired key is: [DW, Acct]
2. Map contains key: false
3. Keys in map: [[DW], [DW, Acct]]
As far as I can see, line 2 of the I/O output should be true, not false, since line 3 shows that the key is present in the map.
Am I missing something here, or is the containsKey() method returning the incorrect result? It looks like it is getting its reference to map all wrong.

How to set specific value of attached file in CRM 2013

Hi,
I have a requirement when I attach a file in notes it should has some value in currency. how to assign value for each attachment file?

Hello,
That's not possible.
In case you want to implement it I would suggest to create additional entity, store value in currency inside, add reference to your initial record and store that data in this way.
Dynamics CRM MVP/ Technical Evangelist at
SlickData LLC
My blog

How to read and update the value of property file

Hi,
I am not able read the values from property file.
Please tell me how to read and update the values from property file using Properties class
This is my property file : - Config.properties its located in D:\newfolder
Values
SMTP = localhost
Now i need to change the value of the SMTP
New value :
SMTP =10.60.1.9
Pls Help me
Thanks
Merlin Rosina,

Post a small (<1 page) example program that forum members can copy and run that demonstrates your problem.

Read Specific value/Search Into file

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