Converting bytes to character array problem

I am trying to convert a byte array into a character array, however no matter which Character Set i choose i am always getting the '?' character for some of the bytes which means that it was unable to convert the byte to a character.
What i want is very simple. i.e. map the byte array to its Extended ASCII format which actually is no change in the bit represtation of the actual byte. But i cannot seem to do this in java.
Does anyone have any idea how to get around this problem?

Thanks for responding.
I have however arrived at a solution. A little un-elegant but it seems to do the job.
I am converting each byte into char manually by this algorithm:
          for (int i=0;i<compressedDataLength;i++)
               if (((int) output)<0)
                    k=(127-((int) output[i]));
                    outputChr[i]=((char) k);
               else
                    k=((int) output[i]);
                    outputChr[i]=((char) k);
               System.out.println(k);
where output is the byte array and outputChr is the character array

Similar Messages

Character array problem

i need to convert this program so it sorts characters instead of numbers:
public class SortDemo {
public static void main(String[] args) {
int[] arrayOfInts = { 32, 87, 3, 589, 12, 1076,
2000, 8, 622, 127 };
for (int i = arrayOfInts.length; --i >= 0; ) {
for (int j = 0; j < i; j++) {
if (arrayOfInts[j] > arrayOfInts[j+1]) {
int temp = arrayOfInts[j];
arrayOfInts[j] = arrayOfInts[j+1];
arrayOfInts[j+1] = temp;
for (int i = 0; i < arrayOfInts.length; i++) {
System.out.print(arrayOfInts[i] + " ");
System.out.println();
Any help please....

Skydiver,
Change your int[] to char[]. It makes sense to change your arrayOfInt to arrayOfChar for the sake of form.
Note that the char values for initializing the array are enclosed in single quotes.
Change your temp variable to type char.
And if you really want to be lazy.....
public class SortDemo {
     public static void main(String[] args) {
          char[] arrayOfChar = {'a','x','f','l','z','b','e','s','q','t'};
          for (int i = arrayOfChar.length; --i >=0;) {
               for (int j = 0; j < i; j++) {
                    if (arrayOfChar[j] > arrayOfChar[j + 1]) {
                         char temp = arrayOfChar[j];
                         arrayOfChar[j] = arrayOfChar[j + 1];
                         arrayOfChar[j + 1] = temp;
                    } // end of if loop
               } // end of j iteration
          } // end of i iteration
          for (int i = 0; i < arrayOfChar.length; i++)
            System.out.print(arrayOfChar[i] + " ");
          System.out.println();
     } // end method main
} // end class SortDemo

Is there an easier way to convert bytes into bit(boolean) arrays?

I am currently using this method to convert bytes into bit arrays:
/*convert byte to int such that it is between 0-255 this is the bytes[] array
                    if ((bytes/128)==1)
                         bit[c+0]=true;
                    else
                         bit[c+0]=false;
                    if ((bytes[i]-bitInt[c+0]*128)/64==1)
                         bit[c+1]=true;
                    else
                         bit[c+1]= false;
                    if ((bytes[i]-bitInt[c+0]*128-bitInt[c+1]*64)/32==1)
                         bit[c+2]=true;
                    else
                         bit[c+2]= false;
                    if ((bytes[i]-bitInt[c+0]*128-bitInt[c+1]*64-bitInt[c+2]*32)/16==1)
                         bit[c+3]=true;
                    else
                         bit[c+3]= false;
                    if ((bytes[i]-bitInt[c+0]*128-bitInt[c+1]*64-bitInt[c+2]*32-bitInt[c+3]*16)/8==1)
                         bit[c+4]=true;
                    else
                         bit[c+4]= false;
                    if ((bytes[i]-bitInt[c+0]*128-bitInt[c+1]*64-bitInt[c+2]*32-bitInt[c+3]*16-bitInt[c+4]*8)/4==1)
                         bit[c+5]=true;
                    else
                         bit[c+5]= false;
                    if ((bytes[i]-bitInt[c+0]*128-bitInt[c+1]*64-bitInt[c+2]*32-bitInt[c+3]*16-bitInt[c+4]*8-bitInt[c+5]*4)/2==1)
                         bit[c+6]=true;
                    else
                         bit[c+6]= false;
                    if ((bytes[i]-bitInt[c+0]*128-bitInt[c+1]*64-bitInt[c+2]*32-bitInt[c+3]*16-bitInt[c+4]*8-bitInt[c+5]*4-bitInt[c+6]*2)==1)
                         bit[c+7]=true;
                    else
                         bit[c+7]= false;

You can loop through and use a bitwise operator instead. Here is an example without the loop.
byte b = 6 ;
if( b & Math.pow( 2, 0 ) == Math.pow( 2, 0 ) ) ;
// the 2^0 bit is on
if( b & Math.pow( 2, 1 ) == Math.pow( 2, 1 ) ) ;
// the 2^1 bit is onetc...
You should get something like 110 when you're done.
If you're wonder what & does (no, its not a boolean &&), it takes the bits in the two numbers you give it and returns a number with all the bits on that are on for each of them.
For example:
10011011 &
11001101 =
10001001
So if we take
110 (6) &
010 (2^1, or 2) =
010 (2 again)
Which means that the number (6) has the 2^1 bit on.

Convert byte array to table of int

[http://www.codeproject.com/KB/database/PassingArraysIntoSPs.aspx?display=Print|http://www.codeproject.com/KB/database/PassingArraysIntoSPs.aspx?display=Print] Hello friends.
I'm pretty new with PL/SQL.
I have code that run well on MSSQL and I want to convert it to PL/SQL with no luck.
The code converts byte array to table of int.
The byte array is actually array of int that was converted to bytes in C# for sending it as parameter.
The TSQL code is:
CREATE FUNCTION dbo.GetTableVarchar(@Data image)
RETURNS @DataTable TABLE (RowID int primary key IDENTITY ,
Value Varchar(8000))
AS
BEGIN
--First Test the data is of type Varchar.
IF(dbo.ValidateExpectedType(103, @Data)<>1) RETURN
--Loop thru the list inserting each
-- item into the variable table.
DECLARE @Ptr int, @Length int,
@VarcharLength smallint, @Value Varchar(8000)
SELECT @Length = DataLength(@Data), @Ptr = 2
WHILE(@Ptr<@Length)
BEGIN
--The first 2 bytes of each item is the length of the
--varchar, a negative number designates a null value.
SET @VarcharLength = SUBSTRING(@Data, @ptr, 2)
SET @Ptr = @Ptr + 2
IF(@VarcharLength<0)
SET @Value = NULL
ELSE
BEGIN
SET @Value = SUBSTRING(@Data, @ptr, @VarcharLength)
SET @Ptr = @Ptr + @VarcharLength
END
INSERT INTO @DataTable (Value) VALUES(@Value)
END
RETURN
END
It's taken from http://www.codeproject.com/KB/database/PassingArraysIntoSPs.aspx?display=Print.
The C# code is:
public byte[] Convert2Bytes(int[] list)
if (list == null || list.Length == 0)
return new byte[0];
byte[] data = new byte[list.Length * 4];
int k = 0;
for (int i = 0; i < list.Length; i++)
byte[] intBytes = BitConverter.GetBytes(list);
for (int j = intBytes.Length - 1; j >= 0; j--)
data[k++] = intBytes[j];
return data;
I tryied to convert the TSQL code to PL/SQL and thats what I've got:
FUNCTION GetTableInt(p_Data blob)
RETURN t_array --t_array is table of int
AS
l_Ptr number;
l_Length number;
l_ID number;
l_data t_array;
BEGIN
     l_Length := dbms_lob.getlength(p_Data);
l_Ptr := 1;
     WHILE(l_Ptr<=l_Length)
     loop
          l_ID := to_number( DBMS_LOB.SUBSTR (p_Data, 4, l_ptr));
          IF(l_ID<-2147483646)THEN
               IF(l_ID=-2147483648)THEN
                    l_ID := NULL;
               ELSE
                    l_Ptr := l_Ptr + 4;
                    l_ID := to_number( DBMS_LOB.SUBSTR(p_Data, 4,l_ptr));
               END IF;
               END IF;
l_data(l_data.count) := l_ID;
          l_Ptr := l_Ptr + 4;
     END loop;
     RETURN l_data;
END GetTableInt;
This isn't work.
This is the error:
Error report:
ORA-06502: PL/SQL: numeric or value error: character to number conversion error
06502. 00000 - "PL/SQL: numeric or value error%s"
I think the problem is in this line:
l_ID := to_number( DBMS_LOB.SUBSTR (p_Data, 4, l_ptr));
but I don't know how to fix that.
Thanks,
MTs.

I'd found the solution.
I need to write:
l_ID := utl_raw.cast_to_binary_integer( DBMS_LOB.SUBSTR(p_Data, 4,l_ptr));
instead of:
l_ID := to_number( DBMS_LOB.SUBSTR (p_Data, 4, l_ptr));
The performance isn't good, it's take 2.8 sec to convert 5000 int, but it's works.

Character array type conversion problem

Hi, I'm using BlazeDS (v3.0.0.544) to remotely call Java code on the server from my Flex client. I'm having trouble when converting a character array type from Java to ActionScript and vice-versa. In my Flex code, if the ActionScript class uses a String type to map to the char[] then the char[] is successfully converted from Java to ActionScript, but not from ActionScript to Java.
// Extract from ActionScript code
private var m_charArray:String;
public function get charArray():String
return m_charArray;
public function set charArray(value1:String):void
m_charArray = value1;
Alternatively, if my ActionScript class uses an Array type then I can successfully send data from the client and populate a char[] field on the server, but can't send an updated char[] back to my ActionScript class.
In fact the Flex console reports:
TypeError: Error #1034: Type Coercion failed: cannot convert "myString" to Array.
The code this time:
// Extract from ActionScript code
private var m_charArray:Array;
public function get charArray():Array
return m_charArray;
public function set charArray(value1:Array):void
m_charArray = value1;
All the other types I have tried work successfully, it's only with char arrays that I've hit a problem.
Any help would be appreciated, thanks.

Hi Graeme,
It is how it works. I can see the inconsistency. You can find an example how of echo char[] in blazeds\trunk\qa\apps\qa-regress\testsuites\mxunit\tests\remotingService\dataTypes\CharTy pesTest.mxml. It echos a char[] in return of a string. You can get the char in a string easily string.charAt() and get its length using length(). I think it may be the reason remoting decided to use a string to represent a char[] instead of a generic objects array. It should be more memory efficient. However, I can see that it can turn into problem as what you descibed. When the data has to send back to server, it has to convert back to array. If the char[] type is used inside an object, it is impossible to do the conversion unless the getter and setter are generic
public function get charArray():Object
return m_charArray;
public function set charArray(value1:Object):void
if (value1 is String)
m_charArray = new Array();
//copy the string elements to it
else
m_charArray = value1;
I know it is ugly, but it the only work around I can think of. I think it needs to log a bug to correct this conversion behavior
William

How do I convert an ASCII character to an array of co-ordinates.

I need to convert and ASCII character to an array of X, Y co-ordinates. I also need to be-able to vary the size of the text (scale of graph i suppose) and position on the graph So i can desplay multiple characters on a graph. However it needs to be stored in an array (or set of arrays) so i can isue these co-ordinates to an instrument.

Maybe the attached VI can help. Using picture control functions, it get the
1bit bitmap of the character/text
on input in a 2D array of booleans.
Jean-Pierre Drolet
"m0mbaj0mba" a écrit dans le message news:
[email protected]..
> I am trying to find a simple way to convert a letter (ASCII character)
> into an array of X,Y co-ordinates. I am involved in two projects that
> involve spelling letters with lasers. At the moment we are plotting
> the points on a graph in excel, transferring the co-ordinates into a
> text file and then converting the content of these text files into a
> set on 1D arrays. As I am sure you can appreciate this is a very long
> winded process. Is there anyway of pl
otting points on an X,Y, graph
> and outputting those points to an array or set of arrays?
>
> Excel spreadshett is attached.
[Attachment GetTextBitmap.vi, see below]
LabVIEW, C'est LabVIEW
Attachments:
GetTextBitmap.vi ‏45 KB

How do I convert the ASCII character % which is 25h to a hex number. I've tried using the scan value VI but get a zero in the value field.

How do I convert the ASCII character % ,which is 25h, to a hex number 25h. I've tried using the scan value VI but I get a zero in the value field.

You can use String to Byte Array for this.

Sending character array (as a bytebuffer) via udp

Hi,
I do have to send a udp packet, containing several variables, and the reciever awaits it as a character array ... (C++, cannot change this part!)
As far as I see it, I can only send ByteBuffers via DatagramPackets via udp.
Has anyone a clue how I can convert a ByteBuffer into another Bytebuffer in a way so that the udp reciever gets it as if I had sent a character array instead ?!?
Or is there actually a character array udp sender ?!?
Any help is highly appreciated, big Thanx in advance,
~Carmela

In C++, char' are unsigned bytes. Thus converting between bytes and chars is fairly straight forward. Java treats char as unsigned short (16-bit) so it converts chars to bytes as UTF-8. (By default) Unless you are using special on ascii characters i.e. 128+ all this makes no difference whatsoever.
A bytebuffer is just a container for bytes. You can encode anything as bytes so there is no magic here. Just get the data as bytes and put it into a ByteBuffer.
String string = "text";
ByteBuffer bb = ByteBuffer.wrap(string.getBytes());

How can i convert an ascii character to a number?

where can I find the function?

A string will be converted to an array of U8.
Unless you convert a single character.
RayR
Message Edited by JoeLabView on 06-27-2008 05:39 PM
Attachments:
Str2Num.vi ‏7 KB
String2Number.PNG ‏7 KB

How do I convert a 1-D array of cluster of 5 elements into a 2-D array of numbers? (history data from a chart)

Hello,
in my vi I have a chart with 5 Plots displaying measurement data.
The user should be able to save all the history data from the chart at anytime. (e.g. the user watches the chart and some event happens, then he presses a "save"-button)
I know, that I can read out the history data with a property node. That is not the problem. The problem is, how do I handle the data? The type of the history data is a 1-D array of cluster of 5 elements.
I have to convert that data somehow into a 2 D-array of numbers or strings, so that I can easily save it in a text-file.
How do I convert a 1-D array of cluster of 5 elements into a 2-D array of numbers?
I use LabVIEW 7.1
Johannes
Greetings Johannes
Using LabVIEW 7.1 and 2009 recently
Solved!
Go to Solution.

Gerd,
thank you for the quick response and the easy solution.
Look what I did in the meantime. I solved the problem too, but muuuch more complicate :-)
And I have converted the numbers to strings, so that I can easily write them into a spreasheet file.
Johannes
Message Edited by johanneshoer on 04-28-2009 10:39 AM
Greetings Johannes
Using LabVIEW 7.1 and 2009 recently
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SaveChartHistory.JPG ‏57 KB
SaveChartHistory.JPG ‏57 KB

Backup failure due to Character set problem

Hi,
I am manually running a COLD backup script in Windows NT environment and all the logs has been captured below:
Recovery Manager: Release 8.1.6.0.0 - Production
RMAN-06005: connected to target database: db1 (DBID=754030292)
RMAN-06009: using target database controlfile instead of recovery catalog
RMAN> shutdown immediate;
2> startup mount;
3> RUN {
4> ALLOCATE CHANNEL disk1 TYPE disk;
5> BACKUP DATABASE TAG 'db1_db_full' FORMAT 'e:\backup\db1\db1_backup';
6> copy current controlfile to 'e:\backup\db1\Control_db1.ctl';
7> }
8>
RMAN-06405: database closed
RMAN-06404: database dismounted
RMAN-06402: Oracle instance shut down
RMAN-06193: connected to target database (not started)
RMAN-06196: Oracle instance started
RMAN-06199: database mounted
Total System Global Area 934143244 bytes
Fixed Size 70924 bytes
Variable Size 260554752 bytes
Database Buffers 673439744 bytes
Redo Buffers 77824 bytes
RMAN-03022: compiling command: allocate
RMAN-03023: executing command: allocate
RMAN-08030: allocated channel: disk1
RMAN-08500: channel disk1: sid=13 devtype=DISK
RMAN-03022: compiling command: backup
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure during compilation of command
RMAN-03013: command type: backup
RMAN-06003: ORACLE error from target database: ORA-06550: line 1, column 166:
PLS-00553: character set name is not recognized
ORA-06550: line 0, column 0:
PL/SQL: Compilation unit analysis terminated
RMAN-06031: could not translate database keyword
Recovery Manager complete.
As the above log shown, I cannot do any backup command in the RUN bracket and it complains that the character set is not recognized.
This set of error happens when I have create six other Oracle databases in my NT box. Before that, I can manually run the backup with no problem and a backupset has been generated.
If you have come across this problem and have solutions of it. That will be great.
Thanks !!
null

kk001 wrote:
Hi ,
The export Backup failing due to character set problem
. . exporting table ravidlx
EXP-00008: ORACLE error 6552 encountered
ORA-06552: PL/SQL: Compilation unit analysis terminated
ORA-06553: PLS-553: character set name is not recognized
P
Please suggest how to set character set
I don't know what you have.
I don't know what you do.
I don't know what you see.
It is really, Really, REALLY difficult to fix a problem that can not be seen.
use COPY & PASTE so we can see what you do & how Oracle responds.
do as below so we can know complete Oracle version & OS name.
Post via COPY & PASTE complete results of
SELECT * from v$version;

Using translate function to correct character set problem....

I have a table(TBL_STOCK) on Oracle XE.
Rows come from sql server 2005 with a trigger on sql server table via the linked server.
But there is a character set problem with some character like İ,Ş,Ğ.
They change to Ý,Þ,Ð. in Oracle.
How can i correct these ? Do you suggest the TRANSLATE function ?
What do u think, if i create an After Insert trigger on Oracle table(TBL_STOCK) and convert these character using the Translate function when they inserted from sql server.
Anyone have any other ideas that can be more efficient. Any thoughts appreciated.
Thanks in advance.
Adam
PS:The NLS_CHARACTERSET of Oracle is AL32UTF8.

It is sql server 2005 and Collation is SQL_Latin1_General_CP1_CI_AS

Converting object wrapper type array into equivalent primary type array

Hi All!
My question is how to convert object wrapper type array into equivalent prime type array, e.g. Integer[] -> int[] or Float[] -> float[] etc.
Is sound like a trivial task however the problem is that I do not know the type I work with. To understand what I mean, please read the following code -
//Method signature
Object createArray( Class clazz, String value ) throws Exception;
//and usage should be as follows:
Object arr = createArray( Integer.class, "2%%3%%4" );
//"arr" will be passed as a parameter of a method again via reflection
public void compute( Object... args ) {
    a = (int[])args[0];
//or
Object arr = createArray( Double.class, "2%%3%%4" );
public void compute( Object... args ) {
    b = (double[])args[0];
//and the method implementation -
Object createArray( Class clazz, String value ) throws Exception {
     String[] split = value.split( "%%" );
     //create array, e.g. Integer[] or Double[] etc.
     Object[] o = (Object[])Array.newInstance( clazz, split.length );
     //fill the array with parsed values, on parse error exception will be thrown
     for (int i = 0; i < split.length; i++) {
          Method meth = clazz.getMethod( "valueOf", new Class[]{ String.class });
          o[i] = meth.invoke( null, new Object[]{ split[i] });
     //here convert Object[] to Object of type int[] or double[] etc...
     /* and return that object*/
     //NB!!! I want to avoid the following code:
     if( o instanceof Integer[] ) {
          int[] ar = new int[o.length];
          for (int i = 0; i < o.length; i++) {
               ar[i] = (Integer)o;
          return ar;
     } else if( o instanceof Double[] ) {
     //...repeat "else if" for all primary types... :(
     return null;
Unfortunately I was unable to find any useful method in Java API (I work with 1.5).
Did I make myself clear? :)
Thanks in advance,
Pavel Grigorenko

I think I've found the answer myself ;-)
Never thought I could use something like int.class or double.class,
so the next statement holds int[] q = (int[])Array.newInstance( int.class, 2 );
and the easy solution is the following -
Object primeArray = Array.newInstance( token.getPrimeClass(), split.length );
for (int j = 0; j < split.length; j++) {
     Method meth = clazz.getMethod( "valueOf", new Class[]{ String.class });
     Object val = meth.invoke( null, new Object[]{ split[j] });
     Array.set( primeArray, j, val );
}where "token.getPrimeClass()" return appropriate Class, i.e. int.class, float.class etc.

Converting bytes to pixels???

Hi Everyone,
My Jdev version is 11.1.2.3.0.
I have deloped one ADF applicaton which is working fine.
Now i have added a table to the page which has 3 columns. The width of the column in ADF page should be equal to width of the column in the database.
How can i convert bytes to pixels in my ADF page.
The three column's width in database are: 200Bytes, 250Bytes, 150Bytes. Now i need to specify the width in pixels in ADF.
how can i do that?
Any ways to do that?
Thanks.

Yeah I meant e[i] - sorry about that.
When you say "diagram the to / from arrays" do you mean you want to see their definition & initialisation? If so, please see below:
numBands, length & width are the three fields read in from the image header.
byte[] imageDataByte = new byte[numBands * length * width];
          ra.read(imageDataByte,0,numBands * length * width);
          int[] iD = new int[numBands * length * width];
          int count = 0;
          int[] imageData = new int[numBands * length * width];
          for (int x = 0; x < length; x++)
          for (int y = 0; y < numBands; y++)
          for (int z = 0; z < width; z++)
               imageData[(length*z+x) + (length* width*y)] += imageDataByte[(length*z+x) + (length* width*y)] << ((length*z+x) + (length* width*y)*512);
               count = count + 1;
               System.out.println(count + ": " + imageData[(length*z+x) + (length* width*y)]);
Any help would be greatly appreciated.
Many thanks,
CG.

HOW TO DO CHECKING BETWEEN THE CHARACTER ARRAY.

hi all!!
can any one please help me in checking the two character arrays.
in my code i need to compare a character array(seq) to that of hydrob and hydrop . if the seq has hydrob then it should be given a different colour. if it has a hydrop then it should be assigned a different colour. if the sequence does not have a character that is neither in hydrob and hydrop then they shuld be given a separate colour.
for (int i=0;i<seqlength;i++)//a for loop to get a letter
            char str1 = seq; // getting the first letter from
for (int j=0;j<hydroblen;j++)//for loop to check the
if (str1 == hydrob[j])//checking problem in here (suppose)
res=1;//setting a value
System.out.println("reach") ;
repaint();//calling d paint function to paint in
//System.out.println("reach") ;
//j++;
System.out.println("over") ;
for (int i=0;i<seqlength;i++)
char str2 = seq[i];
for (int k =0;k<hydroplen;k++)
while(str2==hydrop[k])
res =0;
repaint();
k++;
System.out.println("reach") ;
i have compared them using this. but this is not much efficient which just paints the hydrophilic sequence lenght and paints the seq for that length of sequence.
also the if loop in the paint function which have to do the paint for hydrob is not executing.
if(res==1)
            gc.drawString(s, 700,700) ;// not executing the loop
             for (int i =0;i<seqlength;i++)
           gc.drawString(s, 700,700) ; //to check whether the loop s executing.
        for (int j=0; j<hydroblen;j++)
            x= x0 + radius*Math.sin(theta*(i));
y[i]= y0 - radius*Math.cos(theta*(i));
X[i] = (int) x[i];
Y[i]= (int) y[i];
gc.fillOval(X[j]-7,Y[j]-7,14,14);
seq1 = seq[i] + "";
hydrop1 = hydrop[j]+"";
gc.drawString(seq1, X[i], Y[i]-8);
gc.drawString("",X[j], Y[j]-8);
gc.drawLine(X[j],Y[j],X[j+1],Y[j+1]);
gc.setColor(Color.yellow);

Hi Nitish,
I think you might have to consult SAP for this. In one of my project experience, I had local currency related probled due to currency change in SAP R/3 during the fiscal year.
I had a way out there, in a way that I dropped BW data with old currency and uploaded data with new currency and re-did the consoldiation starting from begining of the fiscal year. Unfortunatley, in your scenarios this is not possible
During my discussion with SAP, I came to know that SAP do provide specific conversion consulting in BW BCS area as well.
Hope this might help you.
Best Regards,
UR

Converting bytes to character array problem

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