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Java Forum / General / January 2006How to load java app from exe binary
I'm wondering how to load java app from a single exe file, just like eclipse, in which eclipse.exe file launches all eclipse application written in java. Does anyone know how to write such exe file using c or cpp to launch java app. I hate using .bat files > I'm wondering how to load java app from a single exe file, just like > eclipse, in which eclipse.exe file launches all eclipse application > written in java. > > Does anyone know how to write such exe file using c or cpp to launch > java app. I hate using .bat files You don't have to. 1) A jar file with a 'main' specified is 'double click launchable'. 2) An app. deployed by JWS makes it even easier for the end user (start from a desktop icon or program menu). HTH  SignatureAndrew Thompson physci, javasaver, 1point1c, lensescapes - athompson.info/andrew Thank you for your information I knew the first method you just mentioned. However, I really want to know why eclipse uses a exe file to launch all the platform, and how to write such a launcher > ..I really want to know why eclipse uses a exe file to launch > all the platform, and how to write such a launcher Maybe you should direct those questions to the people that wrote it. Their forums are here.. <http://www.eclipse.org/newsgroups/index_all.php> SignatureAndrew Thompson physci, javasaver, 1point1c, lensescapes - athompson.info/andrew The only way to do this is to launch the JVM from your C code and give as parameter the class that contains the main method and from there on is java. This is the way eclipse does it. There is no way of converting a java app into a runnable native app. Make use of JNI and you can achieve your goal but is platform dependant check this out and follow the other links too: http://www.inonit.com/cygwin/jni/invocationApi/launch.html Regards very good link Marcin Opaska Thanks a lot, this is what I want :) I heard about the programm that rebuild jar file on the exe file or only run the jar file. But this programm is payable. I think that if you know any other language (C, Pascal, VB) you may create that program. That languages offer functions to load external programs. In nearly future I will be nedeed this program too. Please send what you think over that. thanks Marcin Opaska There are many apps like this. All they do is bundle the JVM and the jar into a single file and when you run it it will do the exact same thing I described earlier. You won't be able to run a java class file on a machine without a jre. All the apps out there are packing the JVM and all the dependencies into a file and that is all. Basically there is the jvm.dll on windows that will run the rest of the java code and this jvm.dll is loaded from your C code. You all may check out sun's very own invocation API at: http://java.sun.com/j2se/1.4.2/docs/guide/jni/spec/invocation.html > I think that if you know any other language (C, Pascal, VB) you may create > that program. Sun provides the "jni.h" that is a wrapper and contains the helper methods for marshalling and with it you can achieve the bridge between jvm and the native code. You cand write your own in Pascal I presume but it ain't worth it. There are many apps like this. All they do is bundle the JVM and the jar into a single file and when you run it it will do the exact same thing I described earlier. You won't be able to run a java class file on a machine without a jre. All the apps out there are packing the JVM and all the dependencies into a file and that is all. Basically there is the jvm.dll on windows that will run the rest of the java code and this jvm.dll is loaded from your C code. You all may check out sun's very own invocation API at: http://java.sun.com/j2se/1.4.2/docs/guide/jni/spec/invocation.html > I think that if you know any other language (C, Pascal, VB) you may create > that program. Sun provides the "jni.h" that is a wrapper and contains the helper methods for marshalling and with it you can achieve the bridge between jvm and the native code. You cand write your own in Pascal I presume but it ain't worth it. See here http://www.excelsior-usa.com/articles/java-to-exe.html Marcin Opaska >I'm wondering how to load java app from a single exe file, just like >eclipse, in which eclipse.exe file launches all eclipse application >written in java. > >Does anyone know how to write such exe file using c or cpp to launch >java app. I hate using .bat files see http://mindprod.com/jgloss/aot.htm http://mindprod.com/jgloss/jet.html http://mindprod.com/jgloss/nativecompiler.html SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. 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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