Online Java compiler

[PhoeniX]

i have a class project:
to create an online java compiler/runner where users can write, compile and execute code...
to start, i think i have to put the compiler on the server, with the jdk of course... but i have doubts as for the interface of the application or the website... and its functionality... what if a user is implementing GUIs... how to manage the output then...

Please, anyone who's interested in giving me tips about this project or any ideas is more than welcome!!

Regards!

[Zosden]

you could just have the user send their files to a server then send back the compiled classes. Then just have the user run the compiled classes.

[PhoeniX]

I wanted it to be interactive... so the users write their code... check it for mistakes... then compile it and run it!!!
It's like a complete JAVA IDE but online!!!!

So????

[Zosden]

I don't think that is possible unless you send back a jar file then have the users run it. If you want an IDE you would have to come up with a way to read the text and check for mistakes and everything else that goes into making an IDE. This is a lot more complicated than you think. Eclipse was a multi-million dollar project worked on by a team of computer scientist. Just keep that in mind.

[rjuyal]

you are trying to create online Eclipse :eek:

[PhoeniX]

Ok guys... thx :P
I'll do my best!!

[danielstoner]

Just a suggestion:

The Java compiler has a public API. It is also integrated with the Java Scripting Engine API. You can read here: Little Tutorials about it. Maybe somehow scripting the compiler can help you achieve the things you want, at least a start. If you want to learn more about scripting a Java application you can read my latest tutorial at: Script Thy Java App | Little Tutorials

In running this kind of application online you have to consider the security implications.

Good luck

[PhoeniX]

Yeah ... that was one of my main concerns.... runnable code online :S:S
but i'll have to try it... hehe
thx anyway... i'll be checking ur tutorials now :P

[grape028]

How is the progress of the project?

[anandpr89]

I'm a final year btech student.I'm planning to do this as my final year project.So, can u help me by telling me the basic idea..and the method for implementing such a compiler?

[mrmatt1111]

That would be a cool google wave extension: Google Wave Extension

=)

[anusha paliwal]

I,m final year studend BE (IT) I choose online compiler as my project.please can u teel me how online java compilers works at server side ,when any users wants to compile their programs ..ur help give the idea about it & this will help me to making class diag,activity diag. thanks

[anandpr89]

Hey, i had done this as my project. The idea was to save the code and to compile it using the system calls.

[JosAH]

Hey, i had done this as my project. The idea was to save the code and to compile it using the system calls.

System calls? What system calls? As far as I know there are no system calls that compile Java source code ...

kind regards,

Jos

[anandpr89]

we did only for c, c++. but i think it will work for java too. In a Linux server, we can compile the code using the calls like
$command=$path_compiler.' -c "'.$compile_file.'" -o "'.$compile_file.'.o" 2>> "'.$result_file.'"';
system($command, $retval);

This is the thing we used. system calls within php.

[JosAH]

we did only for c, c++. but i think it will work for java too. In a Linux server, we can compile the code using the calls like
$command=$path_compiler.' -c "'.$compile_file.'" -o "'.$compile_file.'.o" 2>> "'.$result_file.'"';
system($command, $retval);

This is the thing we used. system calls within php.

Ah, yes, you're simply invoking the compiler from a shell/command line interpreter but that doesn't solve the 'remote compilation' task stated in this thread. b.t.w. the API for the javac compiler is public so there's no need to have a shell running in between your application and the compiler.

kind regards,

Jos

[pabletec]

There is a good online java compiler and runner here. You can also run threads and see the results immediately. http://www.browxy.com

[quad64bit]

Well, doesn't seem that difficult. You're not actually required to convert the java into bytecode yourself right? You can use the official javac?

Groovy on Grails is the way to go. Its a complete MVC web app system that allows the execution of actual java code. You can make calls to a server side instance of javac and provide links to download the compiled binaries, or execute the binary and return the results of the output to the user via formatted GSP (groovy server pages). Bonus, you stay 100% in the JVM. Jetty is a great lightweight application server for Grails apps too. Good luck!

[JosAH]

I wonder how those online compilers work: suppose I have a class A that depends on a class B that depends on a class C. I compile them all (upload the stuff and compile it). Later I change one thing to class A. I think I have to upload the sources for class B and C again if I want to (re)compile the code for class A. I don't think that online compiler keeps a repository of compiled code for me; nah ...

kind regards,

Jos

[quad64bit]

I don't think that online compiler keeps a repository of compiled code for me; nah ...

Yeah probably not. I imagine you need to upload the entire state of a code base for it to work, the same as a local solution.