Easy to Learn Java: Programming Articles, Examples and Tips

Start with Java in a few days with Java Lessons or Lectures

Home

Code Examples

Java Tools

More Java Tools!

Java Forum

All Java Tips

Books

Submit News
Search the site here...
Search...
 
Search the JavaFAQ.nu
1000 Java Tips ebook

1000 Java Tips - Click here for the high resolution copy!1000 Java Tips - Click here for the high resolution copy!

Java Screensaver, take it here

Free "1000 Java Tips" eBook is here! It is huge collection of big and small Java programming articles and tips. Please take your copy here.

Take your copy of free "Java Technology Screensaver"!.

If we write integer or double through Java in a file then the bit pattern for ea

JavaFAQ Home » General Java Go to all tips in General Java


Bookmark and Share

Question: If we write integer or double in Java program in a file then the bit pattern for each is reverse than any other language (like C/Delphi writes an integer as qwer but java writes as rewq).

How can we convert java pattern to other pattern for integer and float/double?

Answer: If you have an int in the reverse order, in Java program you can reverse them manually:

public int reverse(int i) {
    int result = ((i&0xff000000)>>>24)+((i&0x00ff0000)>>>Cool
        +((i&0x0000ff00)<<Cool+((i&0x000000ff)<<24);
    return result;
}

and also use this int to convert to a float.

The new IO in JDK 1.4 handles this situation. ByteBuffer uses instances of java.nio.ByteOrder to determine its byte ordering. The static constants ByteOrder.BIG_ENDIAN and ByteOrder.LITTLE_ENDIAN do exactly what you would expect.

Essentially, if you talk to another Java program, leave the byte ordering alone and it will work. If you talk to a well-behaved socket application in any language, you should also leave the byte ordering alone. You fiddle with byte ordering in only two instances: when you talk to a poorly-behaved network application that does not respect network byte ordering, or when you deal with binary data files created on a little-endian machine.

tips based on article:
http://www.javaworld.com/javaworld/jw-09-2001/jw-0907-merlin_p.html


 Printer Friendly Page  Printer Friendly Page
 Send to a Friend  Send to a Friend

.. Bookmark and Share

Search here again if you need more info!
Custom Search



Home Code Examples Java Forum All Java Tips Books Submit News, Code... Search... Offshore Software Tech Doodling

RSS feed Java FAQ RSS feed Java FAQ News     

    RSS feed Java Forums RSS feed Java Forums

All logos and trademarks in this site are property of their respective owner. The comments are property of their posters, all the rest 1999-2006 by Java FAQs Daily Tips.

Interactive software released under GNU GPL, Code Credits, Privacy Policy