Java Reference
In-Depth Information
}
}
Arrays in Java work nicely. The type checking provides reasonable integrity, and array
bounds are always checked by the runtime system, further contributing to reliability.
The only problem with arrays is: what if the array fills up and you still have data coming in?
See
Resizing an Array
.
Resizing an Array
Problem
The array filled up, and you got an
ArrayIndexOutOfBoundsException
.
Solution
Make the array bigger. Or, use an
ArrayList
.
Discussion
One approach is to allocate the array at a reasonable size to begin with, but if you find your-
self with more data than will fit, reallocate a new, bigger array and copy the elements into
public
public class
class
Array2
Array2
{
public
public final
final static
static
int
int
INITIAL
=
10
,
GROW_FACTOR
=
2
;
public
public static
static
void
void
main
(
String
[]
argv
) {
int
int
nDates
=
0
;
Date
[]
dates
=
new
new
Date
[
INITIAL
];
StructureDemo source
=
new
new
StructureDemo
(
21
);
Date c
;
while
while
((
c
=(
Date
)(
source
.
getDate
())) !=
null
null
) {
// if (nDates >= dates.length) {
// System.err.println("Too Many Dates! Simplify your life!!");
// System.exit(1); // wimp out
