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Java Forum / General / May 2007EXE without JVM
Hello, i would like to know if exists a compiler from java source file to exe. I found a lot of compilers, but everyone with JVM dependence. Exists some compilers that built an all-in-one exe (obviously loosing java portability)? Thank you. > Hello, > i would like to know if exists a compiler from java source file to exe. [quoted text clipped - 3 lines] > > Thank you. FAQ Excelsior Jet GCJ (possibly) But you really should read some of the essays discussing why people want to do this. It is often either not necessary or not a good idea. I'm sure someone will be along to talk about webstart too :-) http://www.excelsior-usa.com/articles/java-to-exe.html http://mindprod.com/jgloss/nativecompiler.html http://www.bearcave.com/software/java/comp_java.html Ian Wilson ha scritto: > FAQ > Excelsior Jet [quoted text clipped - 7 lines] > http://mindprod.com/jgloss/nativecompiler.html > http://www.bearcave.com/software/java/comp_java.html Thank you. I have already considered other ways, but i think a compiled EXE is what i need (because i need fast code). I saw those links, but i need a Win32 compiler... exists something (fine) but for free? thanks >Ian Wilson ha scritto: (mentioned web start) Here are some examples.. <http://www.physci.org/jws> >I have already considered other ways, but i think a compiled EXE is what >i need (because i need fast code). 1st error in your assumptions. A slow Java app. will end up a slow exe. A fast Java app. might not only become faster on future JVM's, but also using different hardware configurations. When you compile to an exe, you must generally make decisions about what to optimise for (speed, memory footprint etc.), whereas the JVM can optimise for each different PC and its configuration. Some further considerations.. <http://www.physci.org/codes/javafaq.html#exe>  SignatureAndrew Thompson http://www.athompson.info/andrew/ Andrew Thompson ha scritto: >> Ian Wilson ha scritto: > [quoted text clipped - 8 lines] > > A slow Java app. will end up a slow exe. I found this: http://schmidt.devlib.org/java/native-compilers.html Seems a compiled runs faster than an VM-pass-through... > Seems a compiled runs faster than an VM-pass-through... I wouldn't bet the farm on that. SignatureLew >Andrew Thompson ha scritto: ... >I found this: http://schmidt.devlib.org/java/native-compilers.html Perhaps you should read it again. >Seems a compiled runs faster than an VM-pass-through... Seems (to quote from the page).. "Higher execution speed. Actually, that is not guaranteed, it depends largely on the application type, the *system* *environment*, the way a particular solution was coded etc. You must do a lot of testing to find out if your code benefits from native execution." OK - so let's imagine you've completed that process for a single configuration of one system environment. You might end up with native code that is 5% faster in that environment. What about the next PC (with a slightly different config.), or the one after that, or the ten others down the hall, or.. It is best left to the JVM to do optimisations, because, as I have mentioned before in this thread, it can do them at run-time - depending on the machine and the execution environment as it exists at that moment. SignatureAndrew Thompson http://www.athompson.info/andrew/ > Thank you. > I have already considered other ways, but i think a compiled EXE is what > i need (because i need fast code). What is your application? BugBear bugbear ha scritto: >> Thank you. >> I have already considered other ways, but i think a compiled EXE is [quoted text clipped - 3 lines] > > BugBear Pathfinding (Astar) on nodes/edges graphs. > bugbear ha scritto: > [quoted text clipped - 7 lines] > > Pathfinding (Astar) on nodes/edges graphs. I suspect that a good algorithm and careful coding will make far more difference than ahead-of-time compilation vs Just-In-Time compilation. >>> BugBear >> >> Pathfinding (Astar) on nodes/edges graphs. > > I suspect that a good algorithm and careful coding will make far more > difference than ahead-of-time compilation vs Just-In-Time compilation. Heartily agreed. Why not develop under JVM and IF FORCED, move to EXE ? BugBear > Ian Wilson ha scritto: >> Excelsior Jet [quoted text clipped - 7 lines] >> http://mindprod.com/jgloss/nativecompiler.html >> http://www.bearcave.com/software/java/comp_java.html > I have already considered other ways, but i think a compiled EXE is what > i need (because i need fast code). Why are you expecting EXE to be faster than the Java code ? I see no basis for that assumption. > I saw those links, but i need a Win32 compiler... exists something > (fine) but for free? The above is available for Win32. Arne 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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