When to use primitive numbers range

Hi
I am a noob and was just wondering in what programming situations I would use javas various number primitives e.g. int, double, byte, long, short, float.
The only situations I have used numbers is:
int - to represent whole numbers
double - to represent decimals, real life example would be prices
Can anyone give me real life examples of where I might use the other number primitives?
Many thanks

Can anyone give me real life examples of where I
might use the other number primitives?Actually to use double (or floating points in general) for currency isn't such a good idea because of rounding problems. An integral type like int or long is a much better alternative for handling "prices".
Floats are often used in graphics applications because it's the "natural" floating point type in OpenGL.
Say you need to store a huge number of integers in an array. You can cut the memory requirements in half by using shorts instead of ints.
So I'd say all primitives have their uses but int and double are probably the most frequently used. If you standardize on them you also avoid implicit conversions in expressions which makes life a lot easier.

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When to use primitive numbers range

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