Things that are static can be used by other classes without having to create an object of the class. For example, if you have a non-static constant in one class, you can't access that variable until you make an object of that class. If the variable were to be made static, I would not have to make a new object of a class to access the constants.
Lets say that I have a "Keys" class that I can use to get the keyCodes for KeyboardEvent listeners. Inside the class I have declared these constants:
const LEFT:int = 37
const UP:int = 38
const RIGHT:int = 39
const DOWN:int = 40
Since they're not static I would have to do something like this in whatever other class I'm using:
var keyNumbers:Keys = new Keys()
And then I could access them by going:
keyNumbers.LEFT or keyNumbers.RIGHT etc. to get the values.
But if I were make the constants static like so:
static const LEFT:int = 37
static const UP:int = 38
static const RIGHT:int = 39
static const DOWN:int = 40
In any other class, I can now simply go:
Keys.LEFT or Keys.RIGHT etc. to get the values
without ever having to create a new object of the keys class, like when I made the keyNumbers object.
