Custom tab completion in Git Bash / MinGW?

Question

This thread is for Powershell. But I need help how to implement the same autocompletion behavior in Git Bash (MinGW) for Windows.

Case 1:

In a folder I have:

File1.java
File1.class
File2.java
File2.class

I want to use a shortcut so I can scroll through only the .java-files (and without the extension shown).

So if I write java and use tab I want to have

java File1

And next tab gives

java File2

Case 2:

Before compiling the java-files I have

File1.java
File2.java

I now want to write javac and use tab so I get

javac File1.java

And tab again gives

javac File2.java

And so forth.

Is this solvable?