array in java ~ Online tutorial

IN the Java programming language arrays are objects , are dynamically
created, and may be assigned to variables of type Object . All methods of
class Object may be invoked on an array.
An array object contains a number of variables. The number of variables may
be zero, in which case the array
is said to be empty.
The variables contained in an
array have no names; instead they are referenced by array access expressions that
use nonnegative integer index values.
These variables are called the components
of the array. If an array has n components, we say n is the length of the array; the
components of the array are referenced using integer indices from 0 to ,
inclusive.
All the components of an array have the same type, called the component type
of the array. If the component type of an array is T, then the type of the array itself
is written T[].
The value of an array component of type float is always an element of the
float value set ; similarly, the value of an array component of type double
is always an element of the double value set.
It is not permitted for the value of an
array component of type float to be an element of the float-extended-exponent
value set that is not also an element of the float value set, nor for the value of an
array component of type double to be an element of the double-extended-exponent
value set that is not also an element of the double value set.

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