Re: Writing to an array

what's your question?

My question is......for my array qty. where would i put that part of the code. The purpose of the program is to allow the user to select an item to buy, pick a quantity, and loop through until done, then get a final cost of the purchase. I feel i got the loop taken care of, but as far as inputing the array, i have no idea where to input it and what to input.
( I understand what arrays do, i just have no idea how to use them in the code,)

Similar Messages

Trouble writing to object array

Hi I did a semester of java 2 years ago and I'm trying to remember what I knew so please bear with me...
I am extracting data from an xml file and then writing that information to an object array called files containing 4 string and 1 array. This files array is in turn an element in another object array containing 400 files arrays called records.
It appeared to be working but when I want it to print out which ever record I have selected it only prints out the last record! It seems to be overwriting each files array with the next?
Another problem I can only print out an element of the array not the entire thing?
Please help have spent weeks on this
Here is the code:
Object[] Records = new Object[400];
Object files[] = new Object[5];
NodeList records = doc.getElementsByTagName("record");
for( int i = 0; i < records.getLength();i++)
Element record = (Element) records.item(i);
NodeList headers = record.getElementsByTagName("header");
Element header = (Element) headers.item(0);
NodeList ids = header.getElementsByTagName("identifier");
for(int j = 0; j < ids.getLength(); j++){
Element id = (Element) ids.item(j);
String ID = getText(id);
files[0] = ID;
NodeList metadatas = record.getElementsByTagName("metadata");
Element metadata = (Element) metadatas.item(0);
NodeList citeseers = metadata.getElementsByTagName("oai_citeseer:oai_citeseer");
Element citeseer = (Element) citeseers.item(0);
NodeList titles = citeseer.getElementsByTagName("dc:title");
for(int k = 0; k < titles.getLength(); k++){
Element title = (Element) titles.item(k);
String TITLE = getText(title);
files[1] = TITLE;
NodeList subjects = citeseer.getElementsByTagName("dc:subject");
for(int m = 0; m < subjects.getLength(); m++){
Element subject = (Element) subjects.item(m);
String SUBJECT = getText(subject);
files[2] = SUBJECT;
NodeList descriptions = citeseer.getElementsByTagName("dc:description");
for(int n = 0; n < descriptions.getLength(); n++){
Element description = (Element) descriptions.item(n);
String DESCRIPTION = getText(description);
files[3] = DESCRIPTION;
String[] Names = new String[20];
NodeList authors = citeseer.getElementsByTagName("oai_citeseer:author");
for(int l = 0; l < authors.getLength(); l++){
Element author = (Element) authors.item(l);
Names[l] = author.getAttribute("name");
files[4] = Names;
System.out.println("The id is "+files[0]);
System.out.println("The title is "+ files[1]);
System.out.println("The Subject is "+ files[2]);
System.out.println("The Description is "+ files[3]);
for(int q=0; q < authors.getLength(); q++){
System.out.println("The Names are "+ ((String[])files[4])[q]);
//Records[i] = files;
System.out.println(((Object[])Records[0])[0]);

I'm afraid I'm not going to make you a millionaire but I feel so relieved at the moment that if I had a million I'd give it to you!!Yeah, I know you won't make me a millionaire, but I can dream... :)
thanks for all your helpYou are welcome. Do you understand why you needed to move the creation of the "files" array.

Writing empty byte array to outputstream

Does anyone know if writing an empty byte array to an outputstream will throw an IOException? I think a little bug in my code is causing this because all seems to work when the byte array is not empty.
Thanks in advance for any help.

The (overridden) method write(byte[]) of java.io.OutputStream throws a java.lang.NullPointerException rather than java.io.IOException when byte[] is simply null.

Writing/reading 3 arrays in one file

hello guys
i am trying to write 3 different arrays(size 25) in one file and seek to retrieve them independently to generate a comparative graph of performance in a different window, as i m designing a biological simulator.
please help me here as i m not sure how to write/read them individually in one file.
thanks a lot in advance
avi

Just write them to a sequentual access file and separate them with some sort of special character. Otherwise use random access files because you know the length of the arrays. http://java.sun.com/docs/books/tutorial/essential/io/rafs.html
I would go with the first because it is the easiest.

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());
    }

Writing data from array to file

May i know how to write string from a array into a file.
I have use string tokenizer to extract every line from a file using readline and use stringtokenizer to spilt the line using tab delimiter for processing.
But if i want to write data from array to file with tab as a delimiter and how to go to the next line. How do i do that. Below is the task and i have state a simple example on a array i have and the file output that i want.
Pls advice.. Thanks
eg of a array
array[0] = Data
array[1] = One
array[2] = Data
array[3] = Two
array[4] = Final
array[5] = Data
From the above array, i want to write to a file so that it will appear something as below
Eg textfile.txt
Data One
Data Two
Final Data
PLs attached a simple code as a example as i am only begining to start useing the IO feature in java. Thanks

Really thanks for your help,
but u are mentioning that i have already know the number of countters in advance , that is to say the 2 * counters.
But is there a way to solve this problem which i mean if i dun know the number of predefined counters. Maybe i should say, there is more than 2 counters and in another situation, the counters will only be defined during runtime. Actually the solution u give will work nicely with 2 counters. but wat if the counter is more than 4, i wll have to concatenate the string a lot of time. so is there any solution around this problem. That why i am wandering if tere is any solution to write to the file when the counters can be only determined in runtime
Pls advice on the above with a code samples if possible.

Writing an integer array to a file...

Okay, so I just wanna write a sorted integer array to file... but I'm having a problem or two.
int[] array = read(new File("C:\\college work\radixsort.txt");
radixSort(array, array.length);That text file is a list of 30 numbers.
After the radixSort method is called the values in the text file are sorted into the correct order. Then I want to write the sorted values to a text file radixSorted.txt
I had too many problems with printArray() so I figured this could be easier.
I have tried FileInputStream and FileWriter but no luck.
I don't want the answer, but just something to help point me in the right direction.
Thank you.

pri.println(char[] x) looks like the one I am looking for.
I have modified the code. I've placed only the println part inside the loop now, but it's just the pri.println(char[], array) now. I'm nearrrrly there! (I think).
try
               PrintWriter pri = new PrintWriter(new FileWriter("C:/college work/radixsort.txt", true));
               for (int h = 0; h < array.length; h++)
                    pri.println(char[], array);
          catch (Exception e)
               e.printStackTrace();
               System.out.println("No such file exists.");
          finally
               pri.close();
          }Edited by: JayJay88 on Nov 8, 2008 1:16 PM

Writing to an array

I am still having problems with my code, and I really can not figure out what the problem could be. My goal is to write a series of bytes to an array, but I can't even get one byte to be written to the array. My code right now is:
byte[] buffer = apdu.getBuffer();
byte numBytes = buffer[ISO7816.OFFSET_LC];
byte byteRead = (byte)(apdu.setIncomingAndReceive());
if (numBytes != byteRead){
ISOException.throwIt(ISO7816.SW_WRONG_LENGTH);
first [0] = buffer[ISO7816.OFFSET_CDATA];
My first array is set up in my main class as:
byte [ ] first;
What am I doing wrong that I can not write to an array? I was told that I need to allocate memory for the array, but I'm not sure how to do that or what exactly that means.

It depends.
If you want the first[] to be stored in EEProm then you have to new it. new stores data in EEProm.
If you want the first[] to be a temporary array, then use the makeTransientByteArray().
Also ONLY allocate memory BEFORE you register the applet with the JCRE. If you do it afterwards, you run the risk of not having available memory. When done before the register(), if there's no memory, then it won't register and the applet won't run.

Writing 2-D array to spreadsheet file changes value of time column when saved

I have a program that creates a new row in a table each time the loop performs. Each time the loop performs and a row is added to the table, the program uses the "write to spreadsheet file.vi" to save this new table over the previous table. The array is also visible on the front panel of the vi. The program works in such a way that you can stop adding data to the array, start adding data to a new array, then come back to the original by using the "read from spreadsheet file.vi". My problem comes after opening the spreadsheet file. The first column of the array, which corresponds to the time when the data in that row was taken, has different values than those that were seen when the array was originally displayed on the front panel. In fact, all of the rows that were created the last time the program was run with that array have the same value in the time column, while all of the other columns keep their correct values. Here is an example of what is happening...
When I start the program, and run it for 5 iterations, I get a table like this displayed on the front panel:
3241713920
85.88012
93.88012
1.735015...
3241713930
85.97603
93.97603
1.747003...
3241713940
84.58855
92.58855
1.573568...
3241713950
84.48096
92.48096
1.560119...
3241713960
84.93667
92.93667
1.617084...
This array is saved to the spreadsheet file with each added row. If I initialize and build another array, then come back to this first array using "read from spreadsheet file.vi," I will receive the following table:
3241713920
85.88012
93.88012
1.735015...
3241713920
85.97603
93.97603
1.747003...
3241713920
84.58855
92.58855
1.573568...
3241713920
84.48096
92.48096
1.560119...
3241713920
84.93667
92.93667
1.617084...
If anyone could tell me why this is happening and/or how to fix it, that would be greatly appreciated. One option I have contemplated is just having each individual row appended to the file instead of resaving the entire array with each iteration. However, I would prefer to do it the way I am currently doing it, so I can pass the array through each time and perform different tasks on it, such as averaging the values in columns over different time periods. Thank you in advance to anyone who can help.

DWDerr wrote:
If anyone could tell me why this is happening and/or how to fix it, that would be greatly appreciated. ...
This KnowledgeBase article may help. I think things changed in LV8.20, but I could be wrong.
=====================================================
Fading out. " ... J. Arthur Rank on gong."

How to load and display a byte array (jpeg) image file dynamically in Flex?

My web service client (servlet) received a binary jpeg data from an Image Server. The Flex application invokes the
servlet via HttpService and receives the binary jpeg data as byte array. How could it be displayed dynamically
without writing the byte array to a jpeg file? Please help (some sample code is very much appreciated).

JPEGEncoder is only useful for converting BitmapData to ByteArray, not the other way around.
By the way JPEGEncoder and PNGEncoder are part of the Flex SDK now, so no need to use AS3Lib (alltough it's a good library to have around).
To display/use a ByteArray as image, use a Loader instance with the loadBytes method.
    Loader.loadBytes(bytes:ByteArray, context:LoaderContext = null);
Listen for the complete event on the Loader.contentLoaderInfo and get the BitmapData in the event handler.
private function loadJpeg():void {
    var loader:Loader = new Loader();
    loader.contentLoaderInfo.addEventListener(Event.COMPLETE, loaderCompleteHandler);
    //jpgBA is the ByteArray loaded from webservice
    loader.loadBytes(jpgBA);
private function loaderCompleteHandler(evt:Event):void {
    var t:LoaderInfo = evt.currentTarget as LoaderInfo;
    // display the jpeg in an Image component
    img.source = t.content;
<mx:Image id="img" scaleContent="false" />

How do i median combine 2-D arrays?

I have 2D arrays in text file format, arranged as rows and colums. These files correspond to pixel values from a CCD. cosmic ray rejection is done by median combining a number of these files, so essentially if i have 10 files, I need to combine element (0,0) with the same element in all ten files and get the median, and write that to a new file, then do the same with element (0,1) etc etc- only thing is - How?! :-) Maybe IMAQ has this facility, but i've not been able to locate it. Thanks!
john

Attached is an example that reads 3 files with 2D tables of numbers...and finds the median.
Using binary files and writing the result array to another file should be a simple modification...
Mads
MTO
Attachments:
FindMedian_Example.zip ‏14 KB

Reading in any file and converting to a byte array

Okay what I am trying to do is to write a program that will read in any file and convert it into a int array so that I can then manipulate the values of the int array and then re-write the file. Once I get the file into an int array I want to try and compress the data with my own algorithm as well as try to write my own encryption algorithm.
What I have been looking for is code samples that essentially read in the file as a byte array and then I have been trying to convert that byte array into an int array which I could then manipulate. So does anyone have any sample code that essentially takes a file and converts it into an int array and then converts it back into a byte array and write the file. I have found code that is close but I guess I am just too new to this. Any help would be appreciated.

You can read a whole file into a byte array like this:File f = new File("somefile");
int size = (int) f.length();
byte[] contents = new byte[size];
DataInputStream in = new DataInputStream(
new BufferedInputStream(new FileInputStream(f)));
in.readFully(contents);
in.close();Note that you need to add in the proper exception handling code. You could also use RandomAccessFile instead of the DataInputStream.
Writing a byte array to a file is easier; just construct the FileOutputStream, call write on it with the byte array, and close the stream.

Pass list of values in an array to the IN statement of SELECT in Oracle 10g

Hi,
This is what I have done so far...
I have loaded the main array array_number_1 using BULK Collect. Within the loop I am filtering the data from this array and writing to another array array_number_2.
I want to use the values from array_number_2 in the SELECT statement.
Eg: SELECT sum(x_amount) charges
FROM x_table
WHERE id IN (array_number_2).
Could you provide a solution to this preferrably with an example.
thanks

I'm not entirely following you, Visakh, but I have a SQL Task setup in which I have an expression that makes a call to a db2 database such as the abbreviated set example below. The list of IDs in the IN statement must come from another SQL Server
database. In the past I have gotten the list of IDs, put them in a recordset and then put that in a for loop to iterate and make one call to db2 for each and every ID. The single ID example can literally take days to run for 100,000 IDs.
Therefore, I want to pull the entire set of results back at one time via a single (or at least fewer calls than there are IDs) DB2 call using 'in' instead. Maybe I am overlooking something but I don't quite see how your example will get me where
I want to go.
Set Example
SELECT
A,
B
FROM
Table 1,
Table 2,
WHERE
    Joins
AND PRSNEUP.ID in ( This is where I want a list of IDs )
Single ID Example
SELECT    A,
B
FROM
Table 1,    Table 2,
WHERE
Joins      AND PRSNEUP.ID = ( VariableContainingASingleID

Multiple writes of a DBL 2D array to binary file

Hello.
Does anyone have an example of writing a 2D array to a binary file multiple times?
Specifically, I need to write a 2D array of DBL to a binary file mulitple times and then (later) be able to read it back (reconvert to DBL). All of the examples that I've found only do one write and then close the file. I need to leave the file reference open and write data to it over the period of a few days. The data comes out of a queue that is fed from a DAQ loop. (In an acquistion loop I feed a queue and in a slower loop I dequeue the data and write it to disk)
I believe it has something to do with the pos mode and offset mode but I can't figure it.
I haven't been able to successfully read the data back yet from the .bin file so I'm not sure if I'm even writing it correctly.
The closest example that I've found is the High Speed Data Logger and High Speed Data Reader but I haven't had any luck with those.
Thanks in advance.
Steve
LabVIEW 7.1
Solved!
Go to Solution.

To change the representation of a number, use the Numeric > Conversion sub-palette.
The example below shows that the wires contain the representation info independently of the destination indicators : you can connect different types of numerics to the same wire and LabVIEW will automatically adapt to the type (the coercion dots indicate that a convertion has been done). Everything you should want to know about converting numbers is explained in the LabVIEW Help : "Conversion VIs and Functions"
Message Edited by chilly charly on 07-30-2005 10:57 AM
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...
Attachments:
Convert to single.png ‏27 KB

Multi dimensional arrays and table indicators

I'm wondering how I can write a string array with more than two dimensions to a table. Specifically what I want to do is this:
I am currently writing a 2d array to the table. Column 1 consists of the channel names from my DAQmx task and Column two is the current data for those channels. What I am trying to do is to split that up into a '2 column view' so that:
Column 1: 1st half of the channel names
Column 2: 1st half of the data
Column 3: 2nd half of the channel names
Column 4: 2nd half of the data
Here are the steps that I've done to try and make this work:
I've split the original 2d array in half by using the 'delete from array' vi which outputs both parts that I need then putting that through the build array vi. When I do this, the data wire out of the build array vi is of type '3d array' I'm thinking it should be a 4d array and I'm not sure why it isn't. When I try and wire the table to this it will not allow it because the sink type is for 2d arrays.
Any advice or suggestions?

Hi scrook,
that you get a 3D array is absolut correct. If you have two 2D array, then the next dimension is 3D. Draw a 2D array on one paper (your first part) and a 2D array on another paper (your second part). If you combine them, put one on the other you get a 3D array.
But you need a 2D array.
See the attached example, pelase.
Hope it helps.
Mike
Attachments:
table_LV80.vi ‏10 KB

Re: Writing to an array

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