They did sue Microsoft... and if memory serves they won.
Microsoft being microsoft, will never accept anything anyone else has done and must do their OWN thing with it.
IIS server, VB Script, etc etc etc are all proof of this crap that went on in the 90s and 2000s with MS.
C# is a complete rip off of Java... Once they lost the lawsuit so they couldn’t bastardize java, they built their own version of it and called it C#
Why java didn’t sue more? Well, that’s anyones guess.. SUN went from darling to bust very quickly. 90s their hardware as top notch and running lots of high powered stuff... top fo the world if you will.. In the early days of the internet, there was very little that wasn’t running on a sun server behind the scenes... then the dot com bubble popped, and their hardware while still great, wasn’t selling like it once was... by 2009 they were a shell of their former self and Oracle.
I honestly don’t know if sun could sue, implementing your own version of a language isn’t illegal. Java is a programming language it can’t be copyrighted, which is where plagiarism falls. So I really don’t think SUN could sue them for that. Courts had already spoken on lots of that, after all how many CLONES do you see (or did you see) on various systems complete rip offs of successful arcade games, that got released? Literally how many thousands of pac man clones or derivatives were sold to various home systems?
Yep. No matter what you may think of Java as a programming language, as a business strategy it was the biggest blunder since IBM let Gates sell MS-Dos to whoever.
The name of the game in complex product marketing is commoditizing the product's compliments. Think cheap gas and cheap tires to make people buy more cars. Sun's premier product wasn't their hardware. It was the Solaris operating system, which was the most popular and the most profitable of all the Unix OS's. But Java commoditizes operating systems. Introducing Jave was a stupid business move and it ultimately destroyed Sun Microsystems.
Java copied C++. C# also copied C++. Everyone copied C/C++.