The Java concurrency package is the only way to get your multi-core CPU to share memory atomically without going "Arrays of 64 byte atomic Structures" with C.

And then you are in segmentation fault hell.

Sun had to rewrite the entire JVM in 2003 with a new memory model, later adopted in C++11 (and still the current C++ memory model) which failed for C++ because this model only works well if you have a VM with GC.

C# is just a plain Java copy after Microsoft got sued for J++ in 1998.

All other languages have problems with concurrency and threads that make them unsuitable for anything really.

So again, Java is the ONLY language/VM you can use on the server and on the client you still want a combination of C(++) and Java for performance + ease of use (avoid segmentation fault hell that no person should suffer).

If you saw bad Java code then that is not the fault of Java.