Converting a linkedlist to an array

I currently have a program which reads in values from a file and stores them in a linked list, but i would like to convert this linked list to an array so i can use my bubble sort code on it which ive already got and it works by sorting through an array. i've tried using the .toArray() method on the list to convert it to an array but its not working. can anyone help me out here?

try something like this:
LinkedList list = new LinkedList();
... // populating the list
Object[] listItems = (Object[])list.toArray(new Object[0]);you should replace Object[] by the Class type you are going to resolve (String[], Integer[], SomethingElse[], ...).

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Hi, how can i break the value for a row and column once i have converted the image to the array???????

Hi, I would like to know how can i break the value for a row and column once i have converted the image to the array. I wanted to make some modification on the element of the array at a certain position. how can i do that?
At the moment (as per attachhment), the value of the new row and column will be inserted by the user. But now, I want to do some coding that will automatically insert the new value of the row and the column ( I will use the formula node for the programming). But the question now, I don't know how to split the row and the column. Is it the value of i in the 'for loop'? I've tried to link the 'i' to the input of the 'replace subset array icon' , but i'm unable to do it as i got some error.
Please help me!
For your information, I'm using LABView 7.0.

Hi,
Thanks for your reply.Sorry for the confusion.
I manage to change the array element by changing the row and column value. But, what i want is to allow the program to change the array element at a specified row and column value, where the new value is generated automatically by the program.
Atatched is the diagram. I've detailed out the program . you may refer to the comments in the formula node. There are 2 arrays going into the loop. If a >3, then the program will switch to b, where if b =0, then the program will check on the value of the next element which is in the same row with b but in the next column. But if b =45, another set of checking will be done at a dufferent value of row and column.
I hope that I have made the problem clear. Sorry if it is still confusing.
Hope you can help me. Thank you!!!!
Attachments:
arrayrowncolumn2.JPG ‏64 KB

Can I convert 3D image to an array of pixels in LabVIEW?

Hi all;
I am still new with labview. I has 1 question, can I convert 3D image to an array of pixels using labview?
Most of the examples I found they only convert 2D image. Hope anyone can give me some hint.
Thank You

look at this thread.
It has links to other threads where the 3D graphs were used.
You should also search for "gif reader" to find threads where images are read from gif files.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

Converting XML String to MessageElement array

Hi,
I am trying to call a .NET web service from my Java client. I used WSDL2Java to generate the java classes for calling the .NET web service. The generated classes to call the service expects an array of org.apache.axis.message.MessageElement objects. I have a string representing an XML document which looks like this:
String xmlString = "<Results><Adjustments><Adjustment><RebuildAdjustmentID>16</RebuildAdjustmentID><IsBasicAdjustment>true</IsBasicAdjustment><AdjustmentType>stone/AdjustmentType><Title>External walls</Title></Adjustment></Adjustments></Results>"
I have tried converting the string into an array of MessageElement objects by the following way:
MessageElement[] m = new MessageElement[1];
Document XMLDoc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(new InputSource(new StringReader(result2.toString())));
m[0] = XMLDoc.getDocumentElement();
However I keep getting the following message returned from the service:
"Object reference not set to an instance of an object"
I have tried a handful of ways but keep getting this same error. I have searched the web for hours looking for a solution to this problem without success so any help/ideas much appreciated,
Thanks.
Paul

Any updates on this?
I am facing a similar problem.

I want to convert a String into an array of bytes

I am working with telnet programming with java, where I want to convert login name and password of an online user in 'String' format to 'Bytes', plz help me. Which Input or Output Stream I can use

Assuming you've got the username / password into a String object, you can convert it to a byte[] array using this method.
String.getBytes();
Look at the String API
http://java.sun.com/j2se/1.3/docs/api/java/lang/String.html
Hope that helps.

Convert float to 4 bytes array

How can I convert float type to 4 byte array -
not with strings but to exact binary representation.

See the javadoc of Float.floatToIntBits. Converting an int to an array of 4 bytes is easy, so I will left it as an exercise.
floatToIntBits
public static int floatToIntBits(float value)Returns a representation of the specified floating-point value according to the IEEE 754 floating-point "single format" bit layout.
Bit 31 (the bit that is selected by the mask 0x80000000) represents the sign of the floating-point number. Bits 30-23 (the bits that are selected by the mask 0x7f800000) represent the exponent. Bits 22-0 (the bits that are selected by the mask 0x007fffff) represent the significand (sometimes called the mantissa) of the floating-point number.
If the argument is positive infinity, the result is 0x7f800000.
If the argument is negative infinity, the result is 0xff800000.
If the argument is NaN, the result is 0x7fc00000.
In all cases, the result is an integer that, when given to the intBitsToFloat(int) method, will produce a floating-point value the same as the argument to floatToIntBits (except all NaN values are collapsed to a single "canonical" NaN value).
Parameters:
value - a floating-point number.
Returns:
the bits that represent the floating-point number.

Convert table control table to array

have can I convert the table control to array at LabVIEW?

A table is a 2D array ! So there is nothing to do to convert a table to an array. See attached example with visible row and column headers.
Attachments:
Table to array.vi ‏20 KB

Convert JPA Query getResultList to Array

I have been struggling with this problem for several hours now. All I have succeeded in doing is attempt every possible way to convert a List into an array and I just get errors.
     // create native SQL query
     Query q = em.createNativeQuery("SELECT * FROM Project p");
     // get and process the results
     List<Project> list = q.getResultList();
        Project[] retVal = new Project[list.size()];
     for (int i = 0; i < list.size(); i++)
         retVal[i] = list.get(i);
     }One would assume this to work, however this generates a ClassCastException, cannot convert Object to Project, oddly because as far as I can see everything in the code is strongly typed. I think Persistence fills the typed List with Object and not Project??
So I tried:
Project[] retVal = list.toArray(new Project[0]);This generates an ArrayStoreException.
Finally I tried the basic, should generate x-lint warning:
Project[] retVal = (Project[])(list.toArray());This also return ClassCastException, same reason as the first attempt.
I want my WebService function to return a standard Project[] not the java.lang.List class. But it seems JPA queries only support getting a List. I have googled to no end for a solution. Help appreciated!
Thanks.

You are almost right, you can solve this two ways as below:
First, use native query with result class reference.
Second, use JPA query with createQuery method.
Both the options should work, see code below:
// First option, create native SQL query with result class reference.
Query q = em.createNativeQuery("SELECT * FROM Project p",Project.class);
// Second option, Create JPA Query.
// Query q = em.createQuery("SELECT p FROM Project p");
// get and process the results
List<Project> list = q.getResultList();
// Putting result to an array
Project[] retVal = new Project[list.size()];
list.toArray(retVal);*Cheers,
typurohit* (Tejas Purohit)

How to convert a waveform signal into array of complex numbers

How to convert a waveform signal into array of complex numbers.

Hi Chaks,
try this:
(Get Waveform components, convert to complex DBL)
Message Edited by GerdW on 01-28-2008 09:23 AM
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome
Attachments:
ToCDB.png ‏1 KB

Convert binary string into binary array

Dear I am looking for a way to convert my ten bit string array into 10 bit array.
Any idea?

Yes, but you need to tell us in more details what you have and what you want.
There is no "10bit string", they come in integer multiples of 8 bits. Some possible interpretations:
Maybe you have a 2 character string (16bits). Do you want the 10 low order bits?
Maybe you have a 10 character formatted string of zeroes and ones, one character for each bit.
Do you have a long string and every 10 consecutive bits are one 10bit number that you want as integer?
Please clarify!
There is no "10bit array". Do you want:
a boolean array with 10 elements, one element per bit?
An integer array if ones and zeroes?
An array of U16, each element corresponding to 10bits of the original string?
something else?
It might help if you could attach a small example containing typical data. (make current values default before saving and attaching here).
LabVIEW Champion . Do more with less code and in less time .

Convert a string to an array/collection

Hi,
I have a string
String s = "[ab,cd,ef,gh]";How can I convert this into a string array , arraylist or vector such that ab, cd, ef, gh are the elements of the array/collection.
Please help.
Any help in this regard will be well appreciated with dukes.
Regards,
Anees

virusakos wrote:
codingMonkey, the "^\\[|\\]$" regular expression will only work for [....,...,....] inputs and not for [...,[....],]...[,...] inputs.
The OP should find the correct regular expression according to the requirements ;-)Meaning that any brackets which are part of the actual data will remain intact.

Converting a vector to an array

hello :-)
i am converting my vector into an array with this syntax:
String[] lmname = (String[])name.toArray();
and try to print my array with
for(int i=0; i<lmname.size; i++)
System.out.println(lmname);
unfortunately, i get this error:
java.lang.ClassCastException
what did i do wrong?

-- you cannot do that...
- if you still want to convert Vector into String[] then you can do this:
             Vector v=new Vector();
           v.add("1");
           v.add("2");
           v.add("3");
           v.add("4");
           String strVector[]=new String[v.size()];
           for (int i = 0; i<v.size(); i++)
                   strVector=new String((String)v.get(i));
     for (int i = 0; i<strVector.length; i++)
     System.out.println (strVector[i]);
... By the way, you can use List instead of Vector,,,

Convert XML data to byte array...

Hello All,
In my application, i have an XML file and the corresponding XSD file. This XML file is having some date, which i want to convert into an byte[] and then save it in a file.
How i can convert the XML data in the byte[]? Here as an example of the xml file and the byte[] data which i want to save in a file.
<?xml version="1.0" encoding="utf-8"?>
<HeadersInfo>
<header>
<id>0</id>
<Name>H1</Name>
</header>
<header>
<id>1</id>
<Name>H2</Name>
</header>
</HeasersInfo>
In the above example 'id' field is of type 'uint' and 'name' field is of type 'string' with max length of '5'. So in this case my byte array should be as shown below:
00 00 00 01 48 31 00 00 00
00 00 00 02 48 32 00 00 00
Here underlines values are for the 'id' parameter where as values in bold are for 'Name' parameter for all the header values in sequence. Name parameter is null (0x00) padded.
Thanks in advance,
IamHuM

Hi,
the following example extract the id, name values using LINQ To Xml and writes it to a memory stream using a binary writer and returns the result as a byte array:
internal static byte[] GetXmlAsByteArray()
var document = XDocument.Parse("<HeadersInfo>"
+ " <header><id>1</id><Name>H1</Name></header>"
+ " <header><id>2</id><Name>H2</Name></header>"
// additional testing
+ " <header><id>32767</id><Name>H1234</Name></header>"
+ " <header><id>305419896</id><Name>H56789</Name></header>"
+ "</HeadersInfo>");
const int NameLength = 5; // Max length for a name
byte[] zeroBytes = new byte[NameLength]; // Helper to fill name
using (var ms = new MemoryStream())
using (var writer = new BinaryWriter(ms))
// write each header
foreach (var header in document.Root.Elements("header"))
int id = (int)header.Element("id");
string name = (string)header.Element("Name");
byte[] nameBytes = System.Text.Encoding.UTF8.GetBytes(name);
Console.WriteLine("id: {0}, Name: {1}", id, name);
// Write id
writer.Write(GetUIntBytes((uint)id));
// Write name NameLength (5) max, otherwise padded
if (nameBytes.Length > NameLength)
writer.Write(nameBytes, 0, NameLength);
else
writer.Write(nameBytes, 0, nameBytes.Length);
if (nameBytes.Length < NameLength)
writer.Write(zeroBytes, 0, NameLength - nameBytes.Length);
byte[] result = ms.ToArray();
// dump array
foreach (var value in result)
Console.Write("{0:X2} ", value);
Console.WriteLine();
return result;
public static byte[] GetUIntBytes(uint value)
if (BitConverter.IsLittleEndian)
// swap bytes
value = ((value & 0x00ff) << 24)
| ((value & 0xff00) << 8)
| ((value & 0x00ff0000) >> 8)
| ((value & 0xff000000) >> 24);
return BitConverter.GetBytes(value);
For a general purpose solution you should create a class and split the example into separate methods to extract the data and write the values (integers, strings).
Regards, Elmar

Convert a string of an array to an int

I want to convert numbers[k] which is a string array to an int. How can i do this. I have tried everyting on the net I can find but not much help

This is my code and I still get a complier error of found: String
required:int
public void squares()
{System.out.println(stringNumbers.length);
for (int k=3;k<=4;k++)
{   System.out.println("the value of k is "+k);
     sqCount++;
//int sqsize= (Integer) stringNumbers[k].valueOf(sqsize);
for (int p=0;p<=stringNumbers.length;p++)
{ String str=stringNumbers[p];
          Integer.parseInt(str);
for(int i=0;i<=4;i++)
{   xcord=i;
     for(int j=0;j<=4;j++)
{   ycord=j;
     if(xcord+stringNumbers[k]<=stringNumbers[2]&& ycord+stringNumbers[k]<=stringNumbers[2])
     { //creating an array for each set of sqNum,xcord,ycord
     System.out.println(sqCount+" "+xcord+" "+ycord);
     else
     { System.out.print("");
}

How do I convert an arrayList to an array []

I want to create a generic method that I can pass a Collection ( An ArrayList if I have to be specific ) and also tell this method the underlying Object type the Collection contains and have it call the Collections.toArray method and create an array [] of the type I specify.
Part of the problem is how do I have the method resolve the return type at run time and how do I use the Class variable to tell it the type of objects the Collection holds.
Fo instance I load an ArrayList with 3 MyClass objects.
I want to pass this to the method and have it return me an array of Type MyClass containing 3 items.
I don't want to have to be tied to a method with the signature
public MyClass [] convert( ArrayList myList ){ ... }Thanks ...

Since it is an "old system" I doubt that is feasible. Also I believe that this was intentionally left out of the API because specifying the array type is more natural than the Class object and using the normal approach you get back the same zero-length array that you passed in if the collection is of size zero. It does look nice from a "caller" perspective though.

Converting a linkedlist to an array

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