Big-endian or little-endian

Hello,
Is JVM big-endian or little-endian? Or is it platform dependent?
How does one check this?
Regards.

I also saw over the internet that java is big-endian. But when you run this small piece of code,
class Test {
     public static void main(String[] args) {
          short x = 10;
          byte high = (byte)(x >>> 8);
          byte low = (byte)x;/* cast implies & 0xff */
          System.out.println( "x=" + x + " high=" + high + " low=" + low );
The output is:
x=10 high=0 low=10
This sample code I have taken from "mindprod.com" site only.
Is storage different from display? Or am I missing something here?
Regards.

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Any need for conversation from big endian and little endian?

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I am planning to migrate an Oracle 9i Database on AIX 5.3 to Oracle 11g R2 Windows 2008, and have planned to use transportable tablespace. But prior to that task is the conversation required from big endian and little endian using RMAN?
Appreciate any suggestions, comments and hints
Thanks

Hi,
Check V$TRANSPORTABLE_PLATFORM, it shows the ending for each supported platform. Given the results on my 11g, I suspect that you'll have to convert the tablespaces...
SYSTEM@oracle11 SQL>select *
2   from V$TRANSPORTABLE_PLATFORM
3 ;
PLATFORM_ID PLATFORM_NAME                                                                                         ENDIAN_FORMAT
          7 Microsoft Windows IA (32-bit)                                                                         Little
          6 AIX-Based Systems (64-bit)                                                                            Big
          8 Microsoft Windows IA (64-bit)                                                                         Little
         12 Microsoft Windows x86 64-bit                                                                          LittleHtH
Johan

Is IntelCore processor big-endian or little-endian?

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I need to know if Mac mini's processor is big-endian or little-endian.
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Little-endian.
Snippit from What is endianness?:
"On the Macintosh platform, PowerPC-based Macintosh computers use big endian addressing, while Intel-based Macs use little-endian addressing."

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The endian matching is only a requirement for the management and data nodes of a MySQL cluster. If you are going to be using a remote MySQL DB, the VDI servers will be connecting to that remote MySQL DB as a client connection, and there is no requirement for clients to match the endian type.
http://dev.mysql.com/doc/refman/5.1/en/mysql-cluster-limitations-exclusive-to-cluster.html

Big Endian and Little Endian formats.

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Not without reading them a byte at a time and doing
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can you tell me what kind of format is used in Java? Big or Little endian?

Java big/little endian file support

Hi, hope you can help,
Firstly is Java bigendian or little endian or is this non manifest.
I have a binary file that may exist either in big endian or little endian format.
Is there support for reading differing byte orders, if not how do I go about reading either format.
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Yes, Java has support for both byte orders.
http://developer.java.sun.com/developer/JDCTechTips/2002/tt0507.html is an issue of JDC Tech Tips that discusses the use of java.nio.channels for this and has example code for writing and reading both orders.
Many thanks.
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Big endian - Little endian conversion

Hi all, I'm a new user!
I'm working with As400 and java using jtopen.
With this code:
PrintObjectTransformedInputStream is = spoolFile.getTransformedInputStream(printParms);
BufferedInputStream bufIn = new BufferedInputStream(is);
BufferedOutputStream bufOut = new BufferedOutputStream(new FileOutputStream("c:/x.tif"));
int c;
while ((c = bufIn.read()) != -1) {
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bufIn.close();
bufOut.close();I'm getting a tiff stream and then write it to a file. The tiff stream is in Big endian format, but I need a tiff in Little endian format.
How can I convert the stream from Big endian to Little endian?
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Tiff is a complex format, containing fields of different lengths, so you aren't likely to succeed just by reversing every pair of bytes in the stream without following the TIF format.
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What is Little Endian / Big Endian in Sound settings for Apple Intermediate

Hi.
In Final Cut Express, I am trying to splice together multiple video clips, combining footage from:
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1. They're compression formats. Different codec use different compression schemes.
2. You should convert your material to QuickTime using the appropriate DV codec and frame rate.
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TCP Programming / Why do not need to worry about Big and little Endian?

Please help, I do not understand this concept please explain.
The architecture of a CPU is either little-endian or big-endian; some modern CPU's allow a choice via software.
The TCP/IP protocol standard specifies that all the bytes that make up an item must be sent in "network order", which happends to be big-endian. Intel Pentium CPU's are little-endian.
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Alex

But why would I need to use the DataOutputStream,You don't have to.
But that's what the Java API provides for sending java primitives over a stream. You wouldn't have to use that. You could chop the int into bytes yourself, and send the bytes, and your Java code still wouldn't have to worry about the endiannes of it, because the VMs handle that.
DataOutputStream just does the chopping and reassembling for you, so it's easier than doing it yoursefl.

Why do not need to worry about Big and little Endian in Java

Please help, I do not understand this concept please explain.
The architecture of a CPU is either little-endian or big-endian; some modern CPU's allow a choice via software.
The TCP/IP protocol standard specifies that all the bytes that make up an item must be sent in "network order", which happends to be big-endian. Intel Pentium CPU's are little-endian.
This implies that on an Intel machine the TCP software will have to chop an int into bytes and then reverse the bytes before transmitting them.
Why does the JAVA TCP software does not need to perform the reversal?
Thanks,
Alex

Java doesn't give you direct access to the individual bytes of a larger data item such as an integer. For this reason you don't have the usual endian problems that occur in C. The actual handling of this is in the DataOutputStream and DataInputStream where the integer is coverted to and from bytes using arithmetic, not by fiddling with the internal structure.
Note that regardless of the machine architecture the operation value%256 will return the low order 8 bits. It's less efficient than assigning an int* to a char*, but it's not fraught with the endian problems or any of the other hardware baggage.

How do I swap 64-bit and 32-bit floats from little-endian to big-ending

I am trying to read a file that could contain a list of 64-bit floats or 32-bit floats that were written on a PC so they are little-endian.
I need to convert the float values to big-endian so that I can process the values. I know that straight swapping each byte with the adjacent byte doesn't work (especially since their floating point values). I've tried swapping them end for end (i.e., byte 15 from the file becomes byte 0 in my array) and that didn't work either.
I know that if I were to read the little-endian float into the big-endian float type (float or double) that the format is pretty much lost (from little I understand about how floating point values are stored in memory).
So, what I need is a way to read in a series of little-endian floating point values (64-bit and 32-bit) into a big-endian array of floating point values.
Anyone have any ideas on how to do this? Any help would be much appreciated.

A 64-bit double is represented by the sign bit, an 11-bit (biased) exponent
followed by a 52-bit mantissa. Both x86 and SPARC use the exact same
representation for 64-bit double. The only difference is the endianness
when stored to memory, as you observed.
A 32-bit float is represented by the sign bit, an 8-bit (biased) exponent
followed by a 23-bit mantissa. Again, both x86 and SPARC use the exact
same representation for 32-bit float modulo endianness.
As you can see, a 64-bit double is not merely a pair of 32-bit float.
You need to know exactly how the floating-point data was written:
if a 32-bit float was written, you must endian-swap it as a 32-bit float;
if a 64-bit double was written, you must endian-swap it as a 64-bit double.

How to find machine is Big/little endian?

Hi,
Can any one tell me that how to find machine on which we are working i.e. Big/Little Endian in using java?
One of my friend told me that in C Programming we can find this by using following code:
#include <stdio.h>
#include <arpa/inet.h>
int main() {
    if (htons(1) == 1) puts("big endian");
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    return 0;
}Can any one help me in solving this mystery?
Cheers,
Ram

java.nio.ByteOrder.nativeOrder();~D

OPEN DATASET Big/Little Endian

Thread opened on behalf of colleague:
SOURCE
I want to create a file on a system that is Big Endian with codepage 4102.
TARGET
I want to read this file in a system that is Little Endian with codepage
4103.
What is the exact 'open dataset' syntax on the SOURCE and TARGET?
The file on the little endian system is not being read correctly. It shortdumps with CONVT_CODEPAGE.
Thanks.

Hi Wang,
Check thie following link:
http://www.s001.org/ABAP-Hlp/abapopen_dataset.htm
Hope this helps you.
Regards,
Chandra Sekhar

Linear PCM - Big Little Endian

Sorry - I'm at a loss.
Assumptions:
Linear PCM is the correct format for exporting audio for FCP - ie Lossless
Ok...
Big Endian seems to be a default with Little Endian wanting a checkbox.
IS there a reason FCP wouldn't accept one or the other?
CaptM

Drew13 had this to say:
Little Endian and Big Endian is how the data is stored with the most signifcant byte on one end or the other (taken from Gulliver's Travels and how the egg should be cracked.(ETA) One of the conflicts in the book is between people who preferred cracking open their soft-boiled eggs from the little end, and the people who preferred the big end.). For the most part you do not need to concern yourself with this (unless you like finding out about those things more) it is transparent in your workflow on the Mac using these apps.(FCP, FCE etc.)
PPC Mac > Big Endian (default)
WIndows PC > Little Endian (default)
• Endianness
This is all well and good except when it comes to the Intel Macs and Dolby AC3 creation with Compressor.
At the moment there's a byte-order compatability Problem mixing UB versions of AC3 with PPC versions of AC3 within the same DVD SP 4.1 project.
Read this:
http://discussions.apple.com/thread.jspa?messageID=3130608&#3130608
MaxR says:
Apple's developer site specifically cites byte-order as a concern for developers of Universal binaries, but seems to have let this slip out anyway. Shame, shame, Apple.
G5 1.8 DP (PCI-X) Mac OS X (10.4.8) ATI X800 XT, 4GB RAM, 20" & 23" ACDs, M-Audio Revolution 5.1, Fostex D15 DAT

Oracle guids little endian, big endian problem

hello every one,
I am having an strange issue. I am developing a .net app against an Oracle DB. Well, when I insert a guid into a raw oracle changes the order of the byte array.
In VB.net I see (with all the representations of guids, with or without {,- or whatever):
ac6d5c4f-542e-4fc8-b8b6-f53821811be3
In Oracle I see (tested with toad and sql tools):
4F5C6DAC2E54C84FB8B6F53821811BE3
It goes ok with the rightests numbers but fails the the leftests.
Any suggestion?

I have to admit that I get the meaning of big/little endian confused.
As JosAH says; Big endian means the big end is first,
NOT that the big value is at the end.And I have to admit that I find that whole big/little-endian jargon quite confusing
too, I mean the most significant byte is stored at the lowest address and we
call it big-endian ... If the number is stored 'backwards' we call it little endian.
In the old days when computers were made of wood and ran on steam, we
used to call it 'low-byte-first' and 'high-byte-first'. Sigh ... those were the days ;-)
kind regards,
Jos

Big-endian or little-endian

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