Storing arrays in a single file!!

Hello all,
Is it possible to store two arrays into a single file either separately or together as a POJO. How to accomplish this??..Need some guidance

try DataInputStream and DataOutputStream
ObjectInput/OutputSTream is used to store Object which use more space.

Similar Messages

How to share structure with arrays in a single file between C# and C with arrays?

It is possible to define things so that a file that contains a struct definition can be included in both C# and C programs once the differences are taken into account. Most of these differences can be handled but not all. One of those problems is arrays.
Here's a contrived example of a file that can be imported directly into either a C or a C# project. If '__c__' is defined then the file is being imported into a C++ project. If not then the file is being consumed by a C# project. This simple little
thing allows those things that are different between the two environments to be taken into consideration. The one really knotty problem is how to handle arrays. In C, an array can be given a fixed size in a struct. Not so in C#. C# generates a compile time
error. I've been working around it so far by numbering the elements in the C# branch.
// If '__c__' is defined then the file is being included in a C project.
// If not then the file is being included in a C# project.
#if !__c__
// C# can utilize a namespace. C cannot.
namespace CrossPlatform
// C# wants to include the struct in a class.
public class Structs
#endif
#if __c__
// C defines a struct as a named typedef.
typedef struct _RtInfo
#else
// C# wants a struct object with a name.
public struct RtInfo
#endif
// Simple value types and previously defined structures
// can be shared directly between both C and C#.
float f;
#if __c__
// Arrays cannot be shared. C can use arrays with a size.
int v[4];
#else
// but C# cannot deal with sized arrays at all.
int v0;
int v1;
int v2;
int v3;
#endif
#if __c__
// C optionally gives the struct a name.
} CALDATA;
#else
// C# does not do that here.
#endif
#if !__c__
} // end of class.
} // end of namespace block wrapper.
#endif
Richard Lewis Haggard

Hi
Richard.
Would you mind letting us know the result of the suggestion?
I temporarily mark
Viorel’s last response as an answer. You can unmark
it if they provide no help.
Best regards,
Kristin
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How to store 2C array to a singl binary file

Hi
I have to store multiple waveforms output that is each 1D array to a single binary file. how do i do this.
i can store 1D array to binary file and retrieve it by reading the binary file and plotting the waveform. but i am not able to store 2D array to the single file. how do store many 1D array in one binary file,
Thank you. Hema

(We would also need to know your LabVIEW version. If you have a very old version, things would be quite different.)
As Smercurio_fc already mentioned, the option to "prepend array size" would make things much easier here, because then you would read it as a single 2D array.
Here's how that would look like. This is probably the recommended solution, just for simplicity reasons.
Not prepending the size is more useful if you write the data in increments, but later want to read it as one.
Message Edited by altenbach on 11-15-2008 09:02 AM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
SaveRestore2D.png ‏21 KB

Writing multiple arrays to a single xml file at seperate times without overwriting the previous file?

Hi my name is Dustin,
I am new to labview and teststand... I am trying to right multiple arrays of data to a single xml file. I can do this with a cluster but I have to create a variable for each of those arrays (21 arrays) and I was hoping to use the same variable for each array. Meaning I obtain my array of data write it to an xml file then replace that array in that variable with a new array and then call up my VI that writes that array to an xml file and write it to the same xml file underneath the first array without overwriting it. Attached is my VI I created to write an array to an xml file. Again I am wondering if there is a way to write multiple arrays to a single xml file at different times without overwriting the previous xml file.
Thanks
Solved!
Go to Solution.
Attachments:
Write_to_XML_File.vi ‏11 KB

Hi dlovell,
Check the attached example. I think it may help you.
Regards,
Nitz
(Give Kudos to Good Answers, Mark it as a Solution if your problem is Solved)
Attachments:
Write to XML.vi ‏17 KB

2 Hyper-V Servers with Failover Cluster and a single File Server and .VHDs stored on a SMB 3 Share

I have 2 X M600 Dell Blades (100 GB local storage and 2 NICs) and a Single R720 File Server (2.5 TB local SAS storage and 6 NICs). I´m planning a Lab/developer enrironment using 2 Hyper-V Servers with Failover Cluster and a single File Server putting
all .VHDs stored on a SMB 3 Share on the File Server.
The ideia is to have a HA solution, live migration, etc, storing the .VHDs onm a SMB 3 share
\\fileserver\shareforVHDs
It is possible? How Cluster will understand the
\\fileserver\shareforVHDs as a cluster disk and offer HA on it?
Or i´ll have to "re-think" and forget about VHDs on SMb 3 Share and deploy using iSCSI?
Storage Spaces makes difference in this case?
All based on wind2012 R2 STD English version

I have 2 X M600 Dell Blades (100 GB local storage and 2 NICs) and a Single R720 File Server (2.5 TB local SAS storage and 6 NICs). I´m planning a Lab/developer enrironment using 2 Hyper-V Servers with Failover Cluster and a single File Server putting
all .VHDs stored on a SMB 3 Share on the File Server.
The ideia is to have a HA solution, live migration, etc, storing the .VHDs onm a SMB 3 share
\\fileserver\shareforVHDs
It is possible? How Cluster will understand the
\\fileserver\shareforVHDs as a cluster disk and offer HA on it?
Or i´ll have to "re-think" and forget about VHDs on SMb 3 Share and deploy using iSCSI?
Storage Spaces makes difference in this case?
All based on wind2012 R2 STD English version
You can do what you want to do just fine. Hyper-V / Windows Server 2012 R2 can use SMB 3.0 share instead of a block storage (iSCSI/FC/etc). See:
Deploy Hyper-V over SMB
http://technet.microsoft.com/en-us/library/jj134187.aspx
There would be no shared disk and no CSV just SMB 3.0 folder both hypervisor hosts would have access to. Much simplier to use. See:
Hyper-V recommends SMB or CSV ?
http://social.technet.microsoft.com/Forums/en-US/d6e06d59-bef3-42ba-82f1-5043713b5552/hyperv-recommends-smb-or-csv-
You'll have however a limited solution as your single physical server being a file server would be a single point of failure.
You can use Storage Spaces just fine but you cannot use Clustered Storage Spaces as in this case you'll have to take away your SAS spindles from your R720 box and mount them into SAS JBOD (make sure it's certified). So you get rid of an active components
(CPU, RAM) and keep more robust all-passive SAS JBOD as your physical shared storage. Better then a single Windows-running server but for a true fault tolerance you'll have to have 3 SAS JBODs. Not exactly cheap :) See:
Deploy Clustered Storage Spaces
http://technet.microsoft.com/en-us/library/jj822937.aspx
Storage Spaces,
JBODs, and Failover Clustering – A Recipe for Cost-Effective, Highly Available Storage
http://blogs.technet.com/b/storageserver/archive/2013/10/19/storage-spaces-jbods-and-failover-clustering-a-recipe-for-cost-effective-highly-available-storage.aspx
Using
Storage Spaces for Storage Subsystem Performance
http://msdn.microsoft.com/en-us/library/windows/hardware/dn567634.aspx#enclosure
Storage
Spaces FAQ
https://social.technet.microsoft.com/wiki/contents/articles/11382.storage-spaces-frequently-asked-questions-faq.aspx
Alternative way would be using Virtual SAN similar to VMware VSAN in this case you can get rid of a physical shared storage @ all and use cheap high capacity SATA spindles (and SATA SSDs!) instead of an expensive SAS.
Hope this helped :)
StarWind VSAN [Virtual SAN] clusters Hyper-V without SAS, Fibre Channel, SMB 3.0 or iSCSI, uses Ethernet to mirror internally mounted SATA disks between hosts.

Getting the response in a single file

Dear friends,
I need a clarriffcation, i am getting the response from rfc for my scenario file-xi-rfc(synchronous). And the result was stored in the ftp folder as a file.Now my issue is my source file having more than one sales order detials so the bappi is triggerd more than once and a result file is created for every sale order created. but i need a single file only to created having all the details of the created sale order. Please tell me how can i hold all the values together and write it at once in a single file. I have tried in sdn but i couldnot get the relevant answer.note i need to perform the same with out bpm.
Thanks and Regards
Karthikeyan

That should be possible using RFC mapping lookups, which is explained in detail in https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/a03e7b02-eea4-2910-089f-8214c6d1b439

How do i save STACKS of images (e.g. TIFF) as a SINGLE file in IMAQ?

I would like to save stacks of images (movies and time series) as single files (TIFF in particular) but i can only find support in IMAQ for saving single images to single files. Does anyone know how to save STACKS? (As far as i know that is a common feature in most frame grabbers).
I am using a PCI-1408 card for analog acquisition and NI-IMAQ driver in Windows 2000.

Bernhard,
There are no utilities in IMAQ to save image sequences in a single file.
One possible solution, if you aren't trying to compress the images, is to extract the 2D array of pixel intensities and save them as a standard array. You would be able to store as many arrays as you want in a single file.
If you want to compress the images, there are utilities for creating AVI files. I have used a wavelet compression utility that I wrote LV drivers for, also. If you are willing to spend a little money, that might be a good solution. You can contact me at bruce@ammonsengineering if you want to discuss it further.
Bruce
Bruce Ammons
Ammons Engineering

Problem in reading no. of files and writing into a single file

Hi,
Iam with Problem in reading no. of files and writing into a single file....
Iam reading no. of files stored in local directory.......
Iam able to read and print the data in files successfully....but while writing..only first file is being written...and the next files are not written in my output file...
plz tell me my mistake....I hope Iam doing some mistake while writing into file...PLz help.....
Basically my code structure is like this....
import java.io.*;
import java.util.regex.*;
import java.util.*;
import java.text.*;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFCell;
class Writing {
public static void main(String args[]) throws Exception {
          FileOutputStream fileOut = new FileOutputStream("ServerResult.xls"); //my output file
          int counter = 1;
          File dir = new File("C:/Perform/ServerLogs");
          String[] children = dir.list();
          if( children == null)
               System.out.println("The Directory mentioned does not exist");
          else {
               for (int fileNo = 0; fileNo < children.length; fileNo++ ) {        //Files iteration starts
                    String filename = children[fileNo];
          File logFile = new File(filename);
FileReader logFileReader = new FileReader(logFile);
BufferedReader logReader = new BufferedReader(logFileReader);
StringBuffer sBuf = new StringBuffer(5000);
          HSSFWorkbook wb = new HSSFWorkbook();
          HSSFSheet sheet = wb.createSheet();
          HSSFRow rowTitle;
          HSSFRow rowReq;
          HSSFRow rowRes;
String aLine = null;
boolean skip = false;
boolean readed = false;
boolean initReq = false;
          boolean flag = false;
long requestTime = 0;
long responseTime = 0;
long recdTime = 0;
long sentTime = 0;
          long hasTime = 0;
          long presentTime = 0;
          int hasCalls = 0;
Pattern startMessage = Pattern.compile("^<MESSAGE.*ID=\".*_"+args[0]+"\".*", Pattern.DOTALL);
Pattern requestMessage = Pattern.compile("^<MESSAGE.*TS=\"(.*)\" CATEGORY=\"RequestMsg.\".*ID=\".*_"+args[0]+"\".*<ActName>(.*)</ActName>.*", Pattern.DOTALL);
Pattern requestMessage1 = Pattern.compile("^<MESSAGE.*TS=\"(.*)\" CATEGORY=\"RequestMsg.\".*ID=\".*_"+args[0]+"\".*<Svc id=\"(.*)\">.*", Pattern.DOTALL);
Pattern responseMessage = Pattern.compile("^<MESSAGE.*TS=\"(.*)\" CATEGORY=\"ResponseMsg\".*ID=\".*_"+args[0]+"\".*", Pattern.DOTALL);
Pattern initMessage = Pattern.compile("^<MESSAGE.*TS=\"(.*)\" CATEGORY=\"HostConnInit\".*ID=\".*_"+args[0]+"\".*", Pattern.DOTALL);
Pattern initResMessage = Pattern.compile("^<MESSAGE.*TS=\"(.*)\" CATEGORY=\"ResponseMsg\".*ID=\"null\".*", Pattern.DOTALL);
Pattern initResIDMessage = Pattern.compile("^<MESSAGE.*TS=\"(.*)\" CATEGORY=\"ResponseMsg\".*ID=\"null\".*<IATA>"+args[0]+"</IATA>.*", Pattern.DOTALL);
          Pattern sentMessage = Pattern.compile("^<MESSAGE.*TS=\"(.*)\" CATEGORY=\"DCMsgSentInfo\".*ID=\".*_"+args[0]+"\".*", Pattern.DOTALL);
          Pattern rcvdMessage = Pattern.compile("^<MESSAGE.*TS=\"(.*)\" CATEGORY=\"DCMsgRcvdInfo\".*ID=\".*_"+args[0]+"\".*", Pattern.DOTALL);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
DecimalFormat dcf = new DecimalFormat("########.##");
String actName = "";
          if (fileNo ==0)
          rowTitle = sheet.createRow((short)0);
          rowTitle.createCell((short)0).setCellType(HSSFCell.CELL_TYPE_STRING);
          rowTitle.createCell((short)0).setCellValue("Req/Res");
          rowTitle.createCell((short)1).setCellType(HSSFCell.CELL_TYPE_STRING);
          rowTitle.createCell((short)1).setCellValue("Action");
          rowTitle.createCell((short)2).setCellType(HSSFCell.CELL_TYPE_STRING);
          rowTitle.createCell((short)2).setCellValue("Server Time(in ms)");
          rowTitle.createCell((short)3).setCellType(HSSFCell.CELL_TYPE_STRING);
          rowTitle.createCell((short)3).setCellValue("Request Vs Response Time in Server(in ms)");
          rowTitle.createCell((short)4).setCellType(HSSFCell.CELL_TYPE_STRING);
          rowTitle.createCell((short)4).setCellValue("Time Taken By HAS/HOST(in ms)");
          rowTitle.createCell((short)5).setCellType(HSSFCell.CELL_TYPE_STRING);
          rowTitle.createCell((short)5).setCellValue("No. of HAS calls");
          rowTitle.createCell((short)6).setCellType(HSSFCell.CELL_TYPE_STRING);
          rowTitle.createCell((short)6).setCellValue("Data Size");
          //wb.write(fileOut);
while((aLine=logReader.readLine()) != null) {
if(aLine.startsWith("<MESSAGE TYPE=\"EVENT\"")) {
Matcher m = startMessage.matcher(aLine);
if(m.find()) {
sBuf.setLength(0);
sBuf.append(aLine);
skip = false;
initReq = false;
m = initMessage.matcher(aLine);
if(m.find()) {
initReq = true;
} else {
if(initReq) {
m = initResMessage.matcher(aLine);
if(m.find()) {
sBuf.setLength(0);
sBuf.append(aLine);
skip = false;
} else if(aLine.startsWith("</MESSAGE>")) {
if(!skip) {
sBuf.append(aLine);
readed = true;
} else if(!skip){
sBuf.append(aLine);
if(!skip && readed) {
String tempStr = sBuf.toString();
if(tempStr.length() > 0) {
boolean reqMatched = false;
Matcher m = null;
if(initReq) {
m = initMessage.matcher(tempStr);
actName = "Intialization";
} else {
m = requestMessage.matcher(tempStr);
String time = "";
if(m.find()) {
reqMatched = true;
for (int i=1; i<=m.groupCount(); i++) {
String groupStr = m.group(i);
if(i == 1) {
time = groupStr;
} else if(i == 2) {
actName = groupStr;
} else if(!initReq){
m = requestMessage1.matcher(tempStr);
if(m.find()) {
reqMatched = true;
for (int i=1; i<=m.groupCount(); i++) {
String groupStr = m.group(i);
if(i == 1) {
time = groupStr;
} else if(i == 2) {
actName = groupStr;
if(time.length() > 0 ) {
try{
requestTime = sdf.parse(time).getTime();
}catch(Exception ex){}
System.out.println("Request,"+actName+","+time+",,,,"+dcf.format(((double)time.length()/1024.0))+"K");
                              //bw.write("Request,"+actName+","+time+",,,,"+dcf.format(((double)time.length()/1024.0))+"K");
                              String reqDataSize = dcf.format(((double)time.length()/1024.0))+"K" ;
                              rowReq = sheet.createRow((short)counter);
                                   rowReq.createCell((short)0).setCellType(HSSFCell.CELL_TYPE_STRING);
                                   rowReq.createCell((short)0).setCellValue("Request");
                                   rowReq.createCell((short)1).setCellType(HSSFCell.CELL_TYPE_STRING);
                                   rowReq.createCell((short)1).setCellValue(actName);
                                   rowReq.createCell((short)2).setCellType(HSSFCell.CELL_TYPE_STRING);
                                   rowReq.createCell((short)2).setCellValue(time);
                                   rowReq.createCell((short)3).setCellType(HSSFCell.CELL_TYPE_STRING);
                                   rowReq.createCell((short)3).setCellValue("");
                                   rowReq.createCell((short)4).setCellType(HSSFCell.CELL_TYPE_STRING);
                                   rowReq.createCell((short)4).setCellValue("");
                                   rowReq.createCell((short)5).setCellType(HSSFCell.CELL_TYPE_STRING);
                                   rowReq.createCell((short)5).setCellValue("");
                                   rowReq.createCell((short)6).setCellType(HSSFCell.CELL_TYPE_STRING);
                                   rowReq.createCell((short)6).setCellValue(reqDataSize);
                                   counter = counter +1;
                                   System.out.println("counter is "+counter);
                         Matcher l = sentMessage.matcher(tempStr);
                         Matcher k = rcvdMessage.matcher(tempStr);
               if(l.find()) {
                                        for (int i=1; i<=l.groupCount(); i++) {
     String groupStr2 = l.group(i);
try{
sentTime = sdf.parse(groupStr2).getTime();
}catch(Exception ex){}
                    if(k.find())
                                             for(int j=1;j<=k.groupCount(); j++) {
                                             String groupStr1 = k.group(j);
                                             try{
recdTime = sdf.parse(groupStr1).getTime();
}catch(Exception ex){}
                                             presentTime = (recdTime - sentTime);
                                             hasTime = hasTime + presentTime;
                                             hasCalls = hasCalls +1;
if(!reqMatched) {
if(initReq) {
m=initResIDMessage.matcher(tempStr);
} else {
m=responseMessage.matcher(tempStr);
if(m.find()) {
for (int i=1; i<=m.groupCount(); i++) {
String groupStr = m.group(i);
try{
responseTime = sdf.parse(groupStr).getTime();
}catch(Exception ex){}
                                             String resDataSize = dcf.format(((double)tempStr.length()/1024.0))+"K" ;
                                             rowRes = sheet.createRow((short)(counter));
                                             rowRes.createCell((short)0).setCellType(HSSFCell.CELL_TYPE_STRING);
                                             rowRes.createCell((short)0).setCellValue("Response");
                                             rowRes.createCell((short)1).setCellType(HSSFCell.CELL_TYPE_STRING);
                                             rowRes.createCell((short)1).setCellValue(actName);
                                             rowRes.createCell((short)2).setCellType(HSSFCell.CELL_TYPE_STRING);
                                             rowRes.createCell((short)2).setCellValue(groupStr);
                                             rowRes.createCell((short)3).setCellType(HSSFCell.CELL_TYPE_NUMERIC);
                                             rowRes.createCell((short)3).setCellValue((responseTime - requestTime));
                                             rowRes.createCell((short)4).setCellType(HSSFCell.CELL_TYPE_NUMERIC);
                                             rowRes.createCell((short)4).setCellValue(hasTime);
                                             rowRes.createCell((short)5).setCellType(HSSFCell.CELL_TYPE_NUMERIC);
                                             rowRes.createCell((short)5).setCellValue(hasCalls);
                                             rowRes.createCell((short)6).setCellType(HSSFCell.CELL_TYPE_STRING);
                                             rowRes.createCell((short)6).setCellValue(resDataSize);
                                             hasTime = 0;
                                             hasCalls = 0;
                                             counter = counter + 1 ;
sBuf.setLength(0);
readed = false;
          wb.write(fileOut);
          } // End of for (int fileNo = 0; fileNo < children.length; fileNo++ )
}     //End of else
          fileOut.close();
} //End of public static void main
} // End of Class

First of all, use [code]-tags to make your code readable, please.
I didn't do a complete inspection of your code (because it's too much and unreadable as it is) and I don't know POI, but creating a new HSSFWorkbook for each input file sounds fishy to me ... try re-using the workbook and just creating a new sheet in each iteration.

Only writing Integer pixel array to a .txt file,or showing in Frame

Sir,
I want to write integer values (range:0 to 255) to a .txt file .Actually after manipulating a .jpeg/.gif image I have gotten a 2D pixel array and a 1D pixel array that can be easily shown in console but I want to write this pixel array into a .txt file. Using of writeInt() is not working. Actually after using this faction the created file contain information which is non-alphanumeric /alphanumeric characters......
following is error free the code: Plz. See only and only into the �class TestImage�and plz look after line marked by //�my_problem_to_be_resolved.�It is just few lines of code .I promise you will not be bothered.Plz��..
import java.awt.*;
import java.io.File;
import java.io.FileWriter;
import java.awt.image.*;
import java.io.*;
import java.util.*;
import javax.imageio.*;
import javax.imageio.stream.*;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
class Image {
protected int width,height;
// 'samples' stores the image pixel values.
protected int[][] samples;
// Constructor: Reads the image from the
// specified file name.
public Image(String filename)
throws Exception { read(filename); }
// Returns the pixel width of the image.
public int getWidth() { return width; }
// Returns the pixel height of the image.
public int getHeight() { return height; }
// Reads the image from the specified file
// name into the 'samples' array. Throws an
// exception if the image is stored in an
// unsupported file format (currently only
// .GIF, .JPG, and .PNG are supported by Sun).
public void read(String filename)
throws Exception {
// Extract the file name suffix.
String ext = filename.substring
(filename.indexOf('.')+1);
// Create a file object for the file name.
File fileImage = new File(filename);
// Get a list of ImageReaders that claim
// to be able to decode this image file
// based on the file name suffix.
Iterator imageReaders = ImageIO.
getImageReadersBySuffix(ext);
ImageReader imageReader;
// Grab the first ImageReader in the list.
if (imageReaders.hasNext())
imageReader = (ImageReader)
imageReaders.next();
// If we get here we cannot decode the image.
else throw new IIOException
("Unsupported image format");
// Create a file input stream object to
// read the image date.
FileImageInputStream imageInputStream =
new FileImageInputStream(fileImage);
// Tell the ImageReader object to read data
// from our file input stream object.
imageReader.setInput(imageInputStream);
// Get the width and height of the image.
width = imageReader.getWidth(0);
height = imageReader.getHeight(0);
// Read the image from the file input stream,
// and close the input stream when done.
BufferedImage bufImage =
imageReader.read(0);
imageInputStream.close();
// Get a raster object so we can extract the
// pixel data from the BufferedImage.
WritableRaster wRaster =
bufImage.getRaster();
// Create our 'samples' 2d-array.
samples = new int[height][width];
// Extract the image data into our 'samples'
// array.
for (int row = 0; row < height; row++)
for (int col = 0; col < width; col++)
samples[row][col] =
wRaster.getSample(col,row,0);
// Write the image stored in the 'samples'
// array to the specified file. The file name
// suffix should be a supported image file
// format (currently either .JPG or .PNG).
public void write(String filename)
throws Exception {
// Extract the file name suffix.
String ext = filename.substring
(filename.indexOf('.')+1);
// Create a file object for the file name.
File fileImage = new File(filename);
// Get a list of ImageWriters that claim to
// be able to encode images in the specified
// image file format based on the file name
// suffix.
Iterator imageWriters = ImageIO.
getImageWritersBySuffix(ext);
ImageWriter imageWriter;
// Grab the first ImageWriter in the list.
if (imageWriters.hasNext())
imageWriter = (ImageWriter)
imageWriters.next();
// If we get here we cannot encode the image.
else throw new IIOException
("Unsupported image format");
// Create a file output stream object to
// write the image data.
FileImageOutputStream imageOutputStream
= new FileImageOutputStream
(fileImage);
// Tell the ImageWriter to use our file
// output stream object.
imageWriter.setOutput
(imageOutputStream);
// The ImageWriter.write() method expects a
// BufferedImage. Convert our 'samples' array
// into a BufferedImage.
BufferedImage bufImage =
createBufferedImage();
// Encode the image to the output file.
imageWriter.write(bufImage);
imageOutputStream.close();
// Draws the image stored in the 'samples'
// array on the specified graphics context.
public void draw(Graphics gc,int x,int y){
BufferedImage bufImage =
createBufferedImage();
gc.drawImage(bufImage,x,y,null);
// Converts the 'samples' array into a
// BufferedImage object. Students do not have
// to understand how this works.
private BufferedImage
createBufferedImage() {
// Create a monochrome BufferedImage object.
BufferedImage bufImage = new
BufferedImage(width,height,
BufferedImage.TYPE_BYTE_GRAY);
// Create a WriteableRaster object so we can
// put sample data into the BufferedImage
// object's raster.
WritableRaster wRaster =
bufImage.getRaster();
// Copy the 'samples' data into the
// BufferedImage object's raster.
for (int row = 0; row < height; row++)
for (int col = 0; col < width; col++)
wRaster.setSample
(col,row,0,samples[row][col]);
// Return the newly created BufferedImage.
return bufImage;
} // End of Class Image
class TestImage {
public static void main(String args[])
throws Exception {
// Create a frame to display the image.
Frame frame = new Frame("Test Image");
frame.setSize(1024,768);
frame.setVisible(true);
Graphics gc = frame.getGraphics();
try {
// Read the image from the file.
Image img = new Image("C:/lilies.jpg");
int height=img.getHeight();
int width =img.getWidth();
//�my_problem_to_be_resolved.�
     File image_object_arry=new File("C:/Image_array.txt");
     FileOutputStream image_object_arry_stream= new FileOutputStream(image_object_arry);
     DataOutputStream int_image_object_arry_stream=new DataOutputStream(image_object_arry_stream);
//Conversion of two dimensional pixel arrry into one dimensional array
int intPixels1[] = new int [height * width];
int k = 0;
for(int i = 0; i <= width; i++) {
for(int j = 0; j <= height; j++) {
intPixels1[k] = img.samples[i][j];
int_image_object_arry_stream.writeInt((int) intPixels1[k]);
// System.out.println(intPixels1[k]);
k = k+1;
import java.awt.*;
import java.io.File;
import java.io.FileWriter;
import java.awt.image.*;
import java.io.*;
import java.util.*;
import javax.imageio.*;
import javax.imageio.stream.*;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
class Image {
protected int width,height;
// 'samples' stores the image pixel values.
protected int[][] samples;
// Constructor: Reads the image from the
// specified file name.
public Image(String filename)
throws Exception { read(filename); }
// Returns the pixel width of the image.
public int getWidth() { return width; }
// Returns the pixel height of the image.
public int getHeight() { return height; }
// Reads the image from the specified file
// name into the 'samples' array. Throws an
// exception if the image is stored in an
// unsupported file format (currently only
// .GIF, .JPG, and .PNG are supported by Sun).
public void read(String filename)
throws Exception {
// Extract the file name suffix.
String ext = filename.substring
(filename.indexOf('.')+1);
// Create a file object for the file name.
File fileImage = new File(filename);
// Get a list of ImageReaders that claim
// to be able to decode this image file
// based on the file name suffix.
Iterator imageReaders = ImageIO.
getImageReadersBySuffix(ext);
ImageReader imageReader;
// Grab the first ImageReader in the list.
if (imageReaders.hasNext())
imageReader = (ImageReader)
imageReaders.next();
// If we get here we cannot decode the image.
else throw new IIOException
("Unsupported image format");
// Create a file input stream object to
// read the image date.
FileImageInputStream imageInputStream =
new FileImageInputStream(fileImage);
// Tell the ImageReader object to read data
// from our file input stream object.
imageReader.setInput(imageInputStream);
// Get the width and height of the image.
width = imageReader.getWidth(0);
height = imageReader.getHeight(0);
// Read the image from the file input stream,
// and close the input stream when done.
BufferedImage bufImage =
imageReader.read(0);
imageInputStream.close();
// Get a raster object so we can extract the
// pixel data from the BufferedImage.
WritableRaster wRaster =
bufImage.getRaster();
// Create our 'samples' 2d-array.
samples = new int[height][width];
// Extract the image data into our 'samples'
// array.
for (int row = 0; row < height; row++)
for (int col = 0; col < width; col++)
samples[row][col] =
wRaster.getSample(col,row,0);
// Write the image stored in the 'samples'
// array to the specified file. The file name
// suffix should be a supported image file
// format (currently either .JPG or .PNG).
public void write(String filename)
throws Exception {
// Extract the file name suffix.
String ext = filename.substring
(filename.indexOf('.')+1);
// Create a file object for the file name.
File fileImage = new File(filename);
// Get a list of ImageWriters that claim to
// be able to encode images in the specified
// image file format based on the file name
// suffix.
Iterator imageWriters = ImageIO.
getImageWritersBySuffix(ext);
ImageWriter imageWriter;
// Grab the first ImageWriter in the list.
if (imageWriters.hasNext())
imageWriter = (ImageWriter)
imageWriters.next();
// If we get here we cannot encode the image.
else throw new IIOException
("Unsupported image format");
// Create a file output stream object to
// write the image data.
FileImageOutputStream imageOutputStream
= new FileImageOutputStream
(fileImage);
// Tell the ImageWriter to use our file
// output stream object.
imageWriter.setOutput
(imageOutputStream);
// The ImageWriter.write() method expects a
// BufferedImage. Convert our 'samples' array
// into a BufferedImage.
BufferedImage bufImage =
createBufferedImage();
// Encode the image to the output file.
imageWriter.write(bufImage);
imageOutputStream.close();
// Draws the image stored in the 'samples'
// array on the specified graphics context.
public void draw(Graphics gc,int x,int y){
BufferedImage bufImage =
createBufferedImage();
gc.drawImage(bufImage,x,y,null);
// Converts the 'samples' array into a
// BufferedImage object. Students do not have
// to understand how this works.
private BufferedImage
createBufferedImage() {
// Create a monochrome BufferedImage object.
BufferedImage bufImage = new
BufferedImage(width,height,
BufferedImage.TYPE_BYTE_GRAY);
// Create a WriteableRaster object so we can
// put sample data into the BufferedImage
// object's raster.
WritableRaster wRaster =
bufImage.getRaster();
// Copy the 'samples' data into the
// BufferedImage object's raster.
for (int row = 0; row < height; row++)
for (int col = 0; col < width; col++)
wRaster.setSample
(col,row,0,samples[row][col]);
// Return the newly created BufferedImage.
return bufImage;
} // End of Class Image
/*class TestImage {
public static void main(String args[])
throws Exception {
// Create a frame to display the image.
Frame frame = new Frame("Test Image");
frame.setSize(1024,768);
frame.setVisible(true);
Graphics gc = frame.getGraphics();
try {
// Read the image from the file.
Image img = new Image("C:/srk.jpg");
// Display the image.
img.draw(gc,10,40);
// Flip the image upside down
//img.flipX();
// Display the flipped image.
img.draw(gc,20+img.getWidth(),40);
// Write the new image to a file
img.write("HorseNew.jpg");
} catch (Exception e) {
System.out.println
("Exception in main() "+e.toString());
class TestImage {
public static void main(String args[])
throws Exception {
// Create a frame to display the image.
Frame frame = new Frame("Test Image");
frame.setSize(1024,768);
frame.setVisible(true);
Graphics gc = frame.getGraphics();
try {
// Read the image from the file.
Image img = new Image("C:/lilies.jpg");
int height=img.getHeight();
int width =img.getWidth();
File image_object_arry=new File("C:/Image_array.txt");
FileOutputStream image_object_arry_stream=new FileOutputStream(image_object_arry);
     DataOutputStream int_image_object_arry_stream=new DataOutputStream(image_object_arry_stream);
//Conversion of two dimensional pixel arrry into one dimensional array
int intPixels1[] = new int [height * width];
int k = 0;
for(int i = 0; i <= width; i++) {
for(int j = 0; j <= height; j++) {
intPixels1[k] = img.samples[i][j];
int_image_object_arry_stream.writeInt((int) intPixels1[k]);
// System.out.println(intPixels1[k]);
k = k+1;
catch (Exception e) {
System.out.println("Exception in main() "+e.toString());
catch (Exception e) {
System.out.println("Exception in main() "+e.toString());
}

My Friend, you need to put your code within CODE tags
And I suspect if anyone would go through your code this way.
Assuming your problem is to write pixel values to a file you may use this,
      try{
        // Create file
        FileWriter fstream = new FileWriter("out.txt");
        BufferedWriter out = new BufferedWriter(fstream);
        for(int i =0; pixels.length() ; i++)
          out.write(pixels[i]+"\t");
       //Close the output stream
       out.close();
       }catch (Exception e){//Catch exception if any
      System.err.println("Error: " + e.getMessage());
    }

Trouble writing pixel array back to gif file

Hi everyone. I am in the middle of constructing a steganography api for a final year group project. I have taken out the pixels into an array from a gif file. I am having trouble writing it back to a gif file. Here is my code:
import javaSteg.stegoLibrary.*;
import java.awt.*;
import java.awt.image.*;
import java.io.*;
import Acme.*;
import Acme.JPM.Encoders.*;
public class Gif extends Canvas{
     public void encodeGif(byte[] imageData){
          //create toolkit obarrayPointerect
          Toolkit t = Toolkit.getDefaultToolkit();
          MediaTracker tracker = new MediaTracker(this);
          //decode specified Gif cover
          Image img = t.createImage(imageData);
          tracker.addImage(img,0);
          try{
               tracker.waitForAll();
          catch(InterruptedException e){
          System.out.println("Tracker interrupted.");
          //retrive picture from image
          int[] pix = new int[img.getWidth(this) * img.getHeight(this)];
          PixelGrabber pg = new PixelGrabber(img, 0, 0, img.getWidth(this), img.getHeight(this), pix, 0, img.getWidth(this));
          try{ pg.grabPixels();
          } catch (InterruptedException ioe) {
               System.err.println("Interrupted");
          if ((pg.getStatus() & ImageObserver.ABORT) != 0) {
          System.err.println("image fetch aborted or errored");
          return;
          //put into byte array
          byte[] pixels = new byte[img.getWidth(this) * img.getHeight(this)];
          for(int arrayPointer=0;arrayPointer<pix.length;arrayPointer++){
               pixels[arrayPointer] = new Integer(pix[arrayPointer]).byteValue();
          //edit pixels not implemented yet
//assign edited pixels to an image
          img = t.createImage(pixels);
          // Now encode the image using ACME free GIF encoder (www.acme.com)
          try{
               FileOutputStream fos = new FileOutputStream("D:\\result.gif");
               GifEncoder encoder = new GifEncoder(img, fos);
               encoder.encode();
               fos.close();
          }catch(IOException e) {
          System.out.println("FATAL IOException "+e);
From this i get a single pixel in my output gif file. Is there a way of swapping out the edited pixels with the origonal pixels in the image file? or an alternative way to write back the complete file.
Thanks a lot
MickyT

ive managed to solve it. For those who come across this thread and want to know the solution i needed to use MemoryImageSource with the pixels inorder to pass them to the createImage method :o)

How to concat multiple text files to a single file??

Hi, guys .. This may be a simple question for you but quite headache for me...
I got files:
c:\text1.txt
c:\text2.txt
c:\text3.txt
and I wanna concat them to a single file and stored as
c:\txt\text123.txt
How do I achieve it? Thanks a lot!
yours, SD

Hello,
The following code is a straightforward way of doing it. You can read directly from file1, file2, file3 withouth using the buffered stream, but the buffered streams are more efficient.
java.io.File f1 = new java.io.File("c:/text1.txt");
java.io.FileInputStream file1 = new java.io.FileInputStream(f1);
java.io.BufferedInputStream input1 = new java.io.BufferedInputStream(file1);
java.io.File f2 = new java.io.File("c:/text2.txt");
java.io.FileInputStream file2 = new java.io.FileInputStream(f2);
java.io.BufferedInputStream input2 = new java.io.BufferedInputStream(file2);
java.io.File f3 = new java.io.File("c:/text3.txt");
java.io.FileInputStream file3 = new java.io.FileInputStream(f3);
java.io.BufferedInputStream input3 = new java.io.BufferedInputStream(file3);
java.io.File f = new java.io.File("c:/text123.txt");
java.io.FileOutputStream out = new java.io.FileOutputStream(f);
int ch = input1.read();
while (ch >= 0){
out.write(ch);
ch = input1.read();
ch = input2.read();
while (ch >= 0){
out.write(ch);
ch = input2.read();
ch = input3.read();
while (ch >= 0){
out.write(ch);
ch = input3.read();

Adding large arrays to a text file as new columns

I am trying to merge several large text data files into a single file in Labview 8.0. The files are too large to read in all at once (9-15 million lines each), so decided I need to read them in as smaller chunks, combine the arrays, and write them to a new file.
The reason there are three separate data files was for speed and streaming purposes in the project, and the users wanted the raw, unadulterated data written to file before any kind of manipulation took place.
My VI:
1. Takes a header generated from another VI and writes it to the output file.
2. Creates a time column based on sample rate and the total number of data points
3. Reads in 3 files that each have text data (each data point is 9 bytes wide, there are up to 15 million data points per file.
4. Each iteration of the for loop writes a chunk of 10 to 100 thousand points (Somewhere in there seems to be the fastest it will do), formatted with the time column on the left, then the three data columns, until it's done. I haven't quite figured out how to write the last iteration if there are fewer data points than the chunk size.
Anyways, the main thing I was looking for was suggestions on how to do this faster. It takes about a minute per million points on my laptop to do this operation, and though I recognize it is a lot of data to be moving around, this speed is painfully slow. Any ideas?
Attachments:
Merge Fast Data.vi ‏67 KB

Thanks for the tip. I put the constants outside the array and noticed a little improvement in the speed. I know I could improve the speed by using the binary file VI's but I need the files as tab delimited text files to import them into MATLAB for another group to do analysis. I have not had any luck converting binary files into text files. Is there an easy way to do that? I don't know enough about binary file systems to use them. I looked at the high speed data logger examples but they seemed complicated and hard to adapt to what I need to do. Creating the binary header file seemed like a chore.
I am up for more advice on the VI I posted, or suggestions on different ways to convert a binary file to a MATLAB readable text file.
Thanks!

Log messages from multiple instances in single file.

Hi!
I have a requirement that i need to log messages from muliple instances of the same object in a file. The new file will be created every day. Likewise, multiple objects might have various instances each.
One class
->multiple instances
-> log message stored in single file.
Note :
I am using the Message driven bean. I need to log from the bean class. JDK 1.3
If u could help me out that would be great.

As long as they are all from the same OS program (a single Java VM), that's OK - you can use Log4j, and use a rotating file logger.
If you point two different virtual machine processes at the same file, one may have it open when the other is trying to rotate it, and your rotation may fail (at best) and/or you may lose the old log (the worst case).
If you need to collect log messages from multiple processes (or even multiple machines), use a syslog-based logger (Log4j has a SyslogAppender) or use Log4j's SocketAppender to write to a log4j-builtin log listener (SocketNode).

Recover a single file in Content Services

I've been asked to document how we would go about recovering a single file in Content Services. The Trash/Archive angle I'm clear on, but what about an extreme case. Lets say that someone created a file, trashed it, emptied the trash, and then it expired from the Archive before the user realized that they needed the file.
Is it possible, and if so how would one go about getting the file back assuming that there is a full db backup once a day?
Would enabling BFILE aging help? If so, how?
On a related note: If archive is set to expire content after 1 month, but BFILE aging is turned off, when does deleted content get purged from the Archive? It's not 1 month, as I have deleted files in the Archive going back to January.

Archive expiration and BFile aging are orthogonal. BFile pushes the LOBs of documents that are in the archive to bfile. Archive expiration deletes files from the archive after the configured time. If this is not the behaviour you are seeing please file a TAR and they can help check whether your system is configured correctly or if you are running into a bug.
regards,
-sancho

Scanning multiple pages to single file

I have the HP Officejet Pro 8600. I use to be able to scan multiple pages to one file. For some reason now it separates the pages into single files. Under advanced settings it looks like the option "create a separate file for each scanned page" is checked, however, it is not highlighted so I can't change it or uncheck it.

KB-Sales,
Welcome to the HP Forum.
Assuming a recent Windows Operating System and that you install the Full Feature Software (printer software), then you may use the Printer Assistant shortcut to access Scan Document or Photo.
From there, you may be able to use / create a Scan Template to combine files to output to a final, single file.
The following Dragon Document may help:
Scan_Multiple_Documents-Combine
Note the hint about creating your own Shortcut / Template in the instructions.
Click the Kudos Thumbs-Up to show you appreciate the help and time from our Experts.
Although I strive to reflect HP's best practices, I do not work for HP.
Click Accept as Solution when the Answer is a good Fix or Workaround!
Kind Regards,
Dragon-Fur

Storing arrays in a single file!!

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