Is Java the best programming language to develop an operating system - I want to know if Java is capable of producing a good operating system except other languages like C plus plus Python Ruby VB etc?

Answer 1

No. Apart from anything else, Java must run in a virtual machine. The only way to write an OS that runs in a VM is if the VM exists in firmware. Even so, the level of abstraction in the VM would make it unworkable. Java does not have any direct access to the hardware, which is a prerequisite for any OS. Even if it were actually possible to write an OS in Java, it would be slower than molasses for even the most basic operations.

C++ is the only real option here, combined with assembler for low-level operations. Of course you must have a complete understanding of all the hardware your OS could run on. The more variable the hardware, the more complex the OS needs to be. Gone are the days when a single programmer threw an OS together in their spare time. These days, we'll take an existing open-source OS and modify it to suit. Even so, it's still a major undertaking.