Speaking of Microsoft, does anyone remember J#? I didn’t think so.
Edit you're right, C# and J# coexisted. I think its still the theme of MS using their own JVM then moving it to dotnet.
J# was Java for .NET, a C# sibling.
Funnily enough, I learned Java in the summer of 1997 in the VJ++ IDE from MSDN tutorial videos, spent a good chunk of my early career doing Java at various places and now work for MSR where I often use Java (or the JVM) on Linux.