Just as it is a good practice to make all fields private unless they need greater visibility, it is a good practice to make all fields final unless they need to be mutable.

Write a program in efficient way as you write for kernel scheduler

why bother with null and java 8 has optional

Everyone knows that debugging is twice as hard as writing a program in the first place. So if you're as clever as you can be when you write it, how will you ever debug it?

Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.

We think we're going to be especially strong in platform where we have our two platform brands: our database brand is the Oracle Database 12c, and our programming language brand is this thing called Java.