Java in Visual Studio

This is a Java question; actually it is more of a blog.

I have searched for ways to build Java files in Visual Studio. I found a few tools that are not free. I also found a web page with a bat file and relatively complicated instructions. I want something that can be somewhat automatic. I know that it is possible to create build rules in VS and it often takes time to figure ou how to do that. I have done it in the past but the VS 2010 way of doing it is different from the past. I have managed to get a start on doing it. If interested, you can try doing the following and hopefully someone can add some fmore to this. First see Specifying Custom Build Tools.

Note that I am using VS 2010; you can do something similar with VS 2008 but I don't know the details of how. Create a new project. In the Installed Templates on the left, expand the C++ node and select General and then in the right side select Empty Project. The reason I say C++ is because it will allow custom build rules but apparently not all language projects do; C# projects do not.

Then add a Java file to the project; a file with a java extension. You can create a text file but give it a java extension. Here is one important detail: save it as a non-Unicode file. I saved the file with encoding and chose US-ASCII encoding. I hope you are able to figure out what I mean. It is probably possible to use the Java compiler with a Unicode source file; I will try to figure that out later or perhaps someone can contribute that here.

Then in the Solution Explorer right-click on the project and choose Properties. First change the Configuration to All. Then in the left side expand Configuration Properties if not expanded and then select General, although I think General is the default. Then in the Solution Explorer click on the Java file. Yes, it is possible to do that; try it. The Property Pages page will change. In the Item Type select Custom Build Rule. Okay, you are almost there. Next click on Custom Build Rule on the left. For the Command line I have:

"C:\Program Files\Java\jdk1.6.0_21\bin\javac.exe" -verbose "%(FullPath)"

The verbose option is optional. For Outputs I have:

$(ProjectDir)%(Filename).class

Note however that the class in the Java file is the same as the filename; if those are different, then this rule will not work and the compiler will be executed for every build even if it is not needed.

I do not know how to build an executable from Java source code; perhaps someone can help with that. I think we would then need another build rule for linking or whatever. Is an executable Java file a jar file?

So if anyone wants to play with that, then you can let us know if you have anything to add.

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Sam Hobbs14y ago
Yes, Mahesh. We will see if we get more from other members. I think I will put more time into exploring before making it a blog or whatever is appropriate.

This would be good for simple one-file Java programs. The next step is to learn how to make a Jar file and if it is possible to do something like this for a multiple-file program (project) conveniently then that would be more useful. It is not likely we could do Android programming using VS but at least this could help developers comfortable with VS to do some beginner learning of Java.
Mahesh Chand14y ago
If it is a blog, You can always publish it as a blog :)
Sam Hobbs14y ago
A single class file can be executed by Java but if we execute Java then window is shown and disappears real fast, even if we are not debugging. So in the debugging properties for the project for the command we can execute the command application, as in "C:\Windows\system32\cmd.exe" but without the double-quotes. Then the arguments will be:

/k "C:\Program Files\Java\jdk1.6.0_21\bin\java.exe" JavaClassFile

You will need to substitute the appropriate names for where Java is at and for your source code and such. This assumes that your working directory is "$(ProjectDir)" (the default).