Two .compareTo method questions?

I searched for a complete table of the lexicographic ordering used in Java, with no avail.

I find collating pattern. But what I need is a ordering that includes letter in upper and lower cases, numbers, operators, space.

I know space is the first in that ordering, what about the rest?

Done of my first question, my 2nd question is:

What exactly does the number returned by compareTo method tells you?

For ex. How many letters apart are two letter of the same index of two different words?