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Java Forum / General / August 2007GNU Java packages
I've just discovered the existence of the GCJ compiler and the GNU Java libraries. I've configured my Eclipse to use it as default JVM and compiler. Now I see that inside the file .jar there are different packages than the Sun version. There're always the "standard" packages (java, java.awt, etc) but there are also the "GNU version" (gnu.java, gnu.awt and so on). Now, what's the difference? If I use the normal package, am I sure that the application will work with Sun VM too? Because if I use the gnu version the computer where I will install the software must have the GCJ and the GNU libraries, right? Are the GNU version of the libraries just an extension of the original ones or the purpose is to rewrite a open version of the Java libraries? Thank you in advance for your help Cold > I've just discovered the existence of the GCJ compiler and the GNU > Java libraries. I've configured my Eclipse to use it as default JVM [quoted text clipped - 7 lines] > version of the libraries just an extension of the original ones or the > purpose is to rewrite a open version of the Java libraries? It is meant as an open version of the Java libraries. See <http://savannah.gnu.org/projects/classpath/> and <http://www.gnu.org/software/classpath/>  SignatureThomas On Jul 26, 1:31 pm, Thomas Fritsch <i.dont.like.s...@invalid.com> wrote: > > I've just discovered the existence of the GCJ compiler and the GNU > > Java libraries. I've configured my Eclipse to use it as default JVM [quoted text clipped - 15 lines] > -- > Thomas OK, but which is "meant as an open version of the Java libraries"? The traditional packages or the gnu.* packages or both? In this case, what are the gnu.* packages? Just extensions of the other ones? Hope my question is clearer now... Cold cold80 schrieb: > On Jul 26, 1:31 pm, Thomas Fritsch <i.dont.like.s...@invalid.com> > wrote: [quoted text clipped - 21 lines] > > Hope my question is clearer now... Aah, I see clear now. The whole GNU thing (i.e. its packages java.* and gnu.*) is meant to replace the whole Sun thing (i.e. their packages java.* and sun.*). When you compare the source code of GNU's and Sun's java.* packages, you'll see they are different. Actually the GNU people reinvented the java.* packages from scratch, without even looking into Sun's source code, only with looking into their API docs. The Java developer (i.e. you) will only use the java.* packages, but not the gnu.* or sun.* packages. SignatureThomas On Jul 26, 2:42 pm, Thomas Fritsch <i.dont.like.s...@invalid.com> wrote: > cold80 schrieb: > [quoted text clipped - 40 lines] > > - Show quoted text - Ah, OK, now I understand...the gnu.* package contains the stuff that was "Sun specific" in the Sun implementation. But, even if the source code is different in GNU version of the java.* packages, the signature of the methods and the object are supposed to be the same, right? I read that the GNU version is not as complete as the Sun version, but do you think for a new project is better to use one or the other? And why, as I heard that Sun realesed the JDK under the GNU license, is preferable to use the GNU version all the same? Thank you very much for your help Cold > Ah, OK, now I understand...the gnu.* package contains the stuff that > was "Sun specific" in the Sun implementation. But, even if the source [quoted text clipped - 4 lines] > why, as I heard that Sun realesed the JDK under the GNU license, is > preferable to use the GNU version all the same? Personally I never preferred the Gnu version. The Sun version is free, now open source at least in part, very efficient and, of course, guaranteed compliant. Gnu's version never worked for me. Also, AIUI, the Gnu version lacks features of Sun's. Furthermore, isn't Gnu still back at the nearly obsolete 1.4 level? I'm pretty darn sure they aren't current with 6, at least. Another really good JVM is IBM's. Their version 6 is in beta now. SignatureLew > Personally I never preferred the Gnu version. The Sun version is free, > now open source at least in part, very efficient and, of course, [quoted text clipped - 4 lines] > > Another really good JVM is IBM's. Their version 6 is in beta now. IBM's is also guaranteed compliant, since they passed the compatibility tests. Fortunately, none of the non-compliant "Java"s have made much headway in the business community. I dread having to create N different versions of my company's software, the way we had to back in the Unix/C days. And in Java, we don't even have #ifdef to help us with doing that (if you call that help). > I > read that the GNU version is not as complete as the Sun version, but [quoted text clipped - 3 lines] > > Thank you very much for your help If you care a lot about the open-source-vs-close-source debate, then you probably have your own opinions about whether Sun or GNU's library is better, so you should just pick the one that you think is better. If you don't really care, then take Sun's. More people have Sun's than GNU's, so you'll have greater compatibility that way. - Oliver >> I >> read that the GNU version is not as complete as the Sun version, but [quoted text clipped - 7 lines] > you probably have your own opinions about whether Sun or GNU's library is > better, so you should just pick the one that you think is better. The SUN library are also open source today. Even the same license: GPL with classpath exception. 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