How would I compile Java with Java?

Asked Jan 29 '16 at 01:24

Active Jan 29 '16 at 01:27

Viewed 57 times

This is a question that sounds funny, but when you think about it, how does it work? I tried it in the example below:

package folder;

public class JavaCompiler {
    public static void main(String[] args){
            //I use the Path class and passes it as an argument.
        Path path = Paths.get("folder\\File.java");
        new JavaCompiler().start(path);
    }

    public void start(Path path){
            //
        Process compiler = Runtime.getRuntime().exec("javac " + path.toAbsolutePath().toString());
    }
}

And here is the class that I am compiling, easy enough right?

package folder;

public class File {
    public static void main(String[] args){
        System.out.println("Hello Java Compiler!");
    }
}

So how would I do it?

edited Jan 29 '16 at 01:27

user207421

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asked Jan 29 '16 at 01:24

SirMathhman

1

How would you do what? Other than what you've done? What happened when you tried it? Unclear what you're asking. NB This is *not* [tag:compiler-construction]. – user207421 Jan 29 '16 at 01:26
Take a look at using `ClassLoader` to load classes at runtime. It isn't exactly what you asked for, but it may be what you need. – Parker Hoyes Jan 29 '16 at 01:28
Look at this [link](http://www.java2s.com/Code/Java/JDK-6/JavaCompilertoolshowyoucancompileaJavasourcefrominsideaJavaprogram.htm) – ruyili Jan 29 '16 at 01:31
@TheCoffeeKid: The duplicate already points to something similar. – Makoto Jan 29 '16 at 01:31
Oh lol, I didn't see that; I was looking at the link and didn't refresh this page yet. – ruyili Jan 29 '16 at 01:33
Well how would I then run that file? – SirMathhman Jan 29 '16 at 01:35
Run what file? What's the question? – user207421 Jan 29 '16 at 01:37
The compiled file at the end... – SirMathhman Jan 29 '16 at 01:37
That's a completely new question. – user207421 Jan 29 '16 at 01:41
Well how would I do it? – SirMathhman Jan 29 '16 at 01:42
1

You would ask a new question. This is a Q&A site, not a forum. Nobody will ever see your new question here. – user207421 Jan 29 '16 at 01:44
You can also do this without the need for executing an external command, take a look at [How do you dynamically compile and load external java classes?](http://stackoverflow.com/questions/21544446/how-do-you-dynamically-compile-and-load-external-java-classes/21544850#21544850) which demonstrates a how to compile, load and run the resulting class – MadProgrammer Jan 29 '16 at 01:59

How would I compile Java with Java?

0 Answers0