Niche Numerics
For a surprisingly wide range of programs int and double
(along with their boxed counterparts Integer and Double)
are the only numeric types you will need.
Every now and then, however, you will want something more exotic1.
void main() {
byte b = 123;
System.out.println(b);
}
1
The reason I am calling these "exotic" and "niche" has nothing to do with how
useful they are. If you want a byte then a byte is what you want. Its just that most
of the time (in my experience) you can get by with a little help from your ints.