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executing dos command in java program

C hurst
Greenhorn

Joined: Nov 21, 2002
Posts: 4
Hi all,
i am writing a program which asks the user to select a a java file. I would then like to take this file and compile it
File theFile = chooser.getSelectedFile();
How would i compile this file from within my java program
thanks


Regards <img src="smile.gif" border="0"> <br />Ciaran
Sean Casey
Ranch Hand

Joined: Dec 16, 2000
Posts: 625
Ciaran,
I'm trying to do something similar - run a unix command from a java program. From what I understand, you can do this with java.lang.Runtime exec() method. Take a look at it. I'm trying to figure out how to return iformation from that command. I hope that helps.
Sean Casey
Ranch Hand

Joined: Dec 16, 2000
Posts: 625
Ciara,
I found this article. Take a look at it:
Running external commands in Java applications
Blake Minghelli
Ranch Hand

Joined: Sep 13, 2002
Posts: 331
I've done this before:



Blake Minghelli<br />SCWCD<br /> <br />"I'd put a quote here but I'm a non-conformist"
Blake Minghelli
Ranch Hand

Joined: Sep 13, 2002
Posts: 331
By the way...
If you're using sdk 1.4+ then you can also use the new com.sun.tools.javac.Main class (in tools.jar) to programmatically compile java classes.
Cindy Glass
"The Hood"
Sheriff

Joined: Sep 29, 2000
Posts: 8521
Well, actually the Main Class of tools came out with the 1.2 release.


Dear Licensee,

The Java(TM) 2 Platform, Standard Edition team will be making a change that might impact you.

The change is that the class "sun.tools.javac.Main" (used for compiling java classes) will be removed in J2SE 1.4.
This is not a public API change. If you depend on this class you may be impacted.

If you have questions, please follow-up with your designated Licensee Engineer.

Regards,
Jill Smith
Java Partner Engineering


You could use the Compile Class of tools. But since neither of these is technically available for the public, and therefore not handled with that consideration in mind, you would be at some risk.


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