Java static imports no longer work

[Doug Blank]

This example no longer works:

import static Graphics.*;

public class JavaGraphics {
    public static void main(String[] args) {
        WindowClass window = Window("Testing", 400, 100);
    }
}

JavaGraphics.main(new String[0]);

Error message:

Run filename '/home/dblank/Calico/languages/Java/examples/JavaGraphics.java'!
tried to access class cli.Graphics$$$003CShow$$003Ec__AnonStoreyA from class cli.Graphics

Maybe we just need to rewrite it without the static imports.

[Doug Blank]

This may have to do with having $ in names. From the calico-dev mailing list, some hints:

• Methods won’t be visible in the converted .dll, because „$“ is an illegal symbol in C# but valid in Java.
• You can use Retroguard to rename the methods in the jar file before converting to a .NET dll.

[Keith O'Hara]

Let me try recreating the *.jar files with my version of ikvm and see if the issue persists. How do you create the jar files again?

[Doug Blank]

There is a makefile in the languages/Java/jar file. But I already did that. In fact, I did that before I tested, so that probably caused the problem.

[Keith O'Hara]

But I used the ikvm-fork version of ikvm, remember? I tried building the jar, but ran into a .net 2.0 vs. 4.0 snafu:

ikvmstub.exe -lib:../../../bin/ -lib:/usr/lib/cli/gtk-sharp-2.0/ -lib:/usr/lib/cli/glib-sharp-2.0/ -lib:/usr/lib/cli/atk-sharp-2.0/ -lib:/usr/lib/cli/gdk-sharp-2.0/ -lib:/usr/lib/cli/pango-sharp-2.0/ ../../../modules/Common.dll Error: unable to load assembly '../../../modules/Common.dll' as it depends on a higher version of mscorlib than the one currently loaded

[Doug Blank]

Does that mean that we can't just run make? Can you put additional instructions in that directory? Should we include the mono IKVM in Calico git?

[Keith O'Hara]

Well you can run make but odds are you will be running a different version of ikvm. I'll add a README with a link to the proper version.

What do you make of this .Net 4.0 vs. 2.0 problem. Do the modules really need 4.0? I'm totally ignorant of the differences. Except for 4.0 broke ROS support on Windows and Mac OS X.

[Doug Blank]

I am ignorant as well. I think that I broke F# and C# in this same manner. I'm going to try to go back to previous versions of both.

If the IKVM files are cross-domain, we can just add them to the repository. I think we already have some in languages/Java/lib

[Doug Blank]

Can you rebuild the libraries and see if that fixes the issue?

[Keith O'Hara]

I was able to rebuild Graphics and Myro using sdk:2 and they seem OK. I'm having trouble rebuilding Common though.

[Doug Blank]

Wait, you have to rebuild the modules/*.dll, just for use in Java? Maybe we can use copies of the DLLs compiled for Java? I would hate to make such a major change minutes before releasing...

[Keith O'Hara]

I'm trying to rebuild modules. But I'm getting caught on Common, I'm wrestling with monodevelop to make it use 2.0 rather than 4.0. The other modules have Makefiles I can easily edit.

I was unable to run ikvmstub on the dll's because of an mscor mismatch.

[Keith O'Hara]

OK, I won't rebuild those then. I think we should get this java stuff figured out before the release. What's the rush?

[Keith O'Hara]

I figured out how to rebuild the jar's from dll's and force 4.0 version of mscorlib.

[Doug Blank]

Ok, that is very good. I was tracking down some esoteric things that weren't working. But the updated libraries made them work again. So, ok!

[Doug Blank]

This issue is resolved!

[Keith O'Hara]

How'd you fix it?

[Doug Blank]

I think when you replaced the jar files, it started working again.

[Keith O'Hara]

I just finished replacing the jars in java/jars now (they werent' checked in!). I was having trouble rebuilding them with the 2.0 ikvm.

[Keith O'Hara]

I'm still getting the java error:

Run filename '/home/keithohara/gitCalico/languages/Java/examples/JavaGraphics.java'! tried to access class cli.Graphics$$$003CShow$$003Ec__AnonStoreyA from class cli.Graphics

[Doug Blank]

I must have been mistaken... I was going back to previous versions using "git checkout XXXX" and something must have been from the older version. I get the error again.

[Doug Blank]

git checkout 360f2ca

will take you to version 2.3.7.

git checkout HEAD

will return you

[Doug Blank]

My git advice is wrong... it only pulls out particular changes. Do you know how to put yourself back at a point in the git tree?

[Keith O'Hara]

I thought git checkout was the correct way to do this.

[Doug Blank]

I thought so, but if you look at the files, some of them are from later versions...

[Keith O'Hara]

A new set of .jar and dll based on ikvm-7.2.4630.5 - this fixes the java module problem with ROS stil running. Fixes Issue 27.

→ <<cset 98f52b81f380>>

[Doug Blank]

Looks good to me on all platforms. Great work!