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Java Forum / General / December 2005CRC32
Hi, I want create a method that receive as input a byte[] and calculate its crc32. How can I do? I have found java.util.zip.CRC32 but I'm using JDK 1.3. Can you halp me? Thanks >I have found java.util.zip.CRC32 but I'm using JDK 1.3. I thought it came out in JDK 1.1. Anyway, how to use it is documented at http://mindprod.com/jgloss/crc.html I have the source code for a CRC-16 posted there. Perhaps you could generalise it to 32 bit.  SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. I'm unable to see "how you compute a 32-bit CRC using Java' native method" into mindprod site. I have this message error: java.lang.ClassNotFoundException:com.mindprod.jdisplay.JDisplay.class Please can you cut and past the code and send me it ? >I'm unable to see "how you compute a 32-bit CRC using Java' native >method" into mindprod site. I have this message error: >java.lang.ClassNotFoundException:com.mindprod.jdisplay.JDisplay.class >Please can you cut and past the code and send me it ? you likely don't have your java installed correctly. See http://mindprod.com/jgloss/jre.html#TESTING SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. It's too complicate! I have need to resolve my problem before possible. Thanks >It's too complicate! >I have need to resolve my problem before possible. >Thanks If you are JRE/JDK is not installed properly you are not going to get very far until you sort that out. SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. On Wed, 21 Dec 2005 11:00:27 GMT, Roedy Green <my_email_is_posted_on_my_website@munged.invalid> wrote, quoted or indirectly quoted someone who said : >I have the source code for a CRC-16 posted there. Perhaps you could >generalise it to 32 bit. I did quick look on the net and found a FORTH and an Pascal version. If you need a Java version, I will translate it for you into Java and guarantee it gives the same answers as Sun's CRC32 for $50. SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. No thanks. > No thanks. LOL - that was not a bad deal. If only I could get Roedy to make my CR10 RS232 Communication library in Java for 50$. I have code in C++ which 'mostly' works. I wrote a CRC algorithm in C++ once, and could translate it. - <humor> I can underbid Roedy, but only give 80% guarantee that it will work. </humor> -- LTP :) I do not want to buy null. I will find on the net >I do not want to buy null. I will find on the net What is "null"? Do you mean "custom written"? SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. >>I do not want to buy null. I will find on the net > > What is "null"? Do you mean "custom written"? Null = Zero If I were attempting to interprit this statement I would translate null as "anything" -- LTP :) > What is "null"? Do you mean "custom written"? He is probably deeply offended by the unthinkable idea of first fixing his Java installation and then just using the since 1.2 included CRC32 class. Which happens to be based on a CRC implementation in native code. /Thomas SignatureThe comp.lang.java.gui FAQ: ftp://ftp.cs.uu.nl/pub/NEWS.ANSWERS/computer-lang/java/gui/faq http://www.uni-giessen.de/faq/archiv/computer-lang.java.gui.faq/ Yes I want say anything. Excuse me but I don't speak english very well. I'm Italian. > Yes I want say anything. > Excuse me but I don't speak english very well. > I'm Italian. It might help to post both English *and* Italian versions. Many people here will get more from the 'native language' version. [ Though posting in Italian *only*, would not be very welcome. ] SignatureAndrew Thompson physci, javasaver, 1point1c, lensescapes - athompson.info/andrew > Yes I want say anything. > Excuse me but I don't speak english very well. > I'm Italian. No problem. You should just download the latest JDK -- LTP :) I cannot buy null. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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