As far as I know, they never planned to ever use those reserved words. They made them reserved because using them in your code could lead to some confusion for developers coming from a C background, I think.
The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - Heraclitus
There purpose of const was to create constant value which we could use Final
goto have done a lote of problem in other language so the people in java just want worry about using it so they leave it (I think so)