Java Reference
In-Depth Information
Display 6.9
Accessor Method for an Array Instance Variable
8
public
ToyExample(
int
arraySize)
9
{
10
a =
new
Date[arraySize];
11
for
(
int
i = 0; i < arraySize; i++)
12
a[i] =
new
Date();
13
}
Copy constructor for
ToyExample
14
public
ToyExample(ToyExample object)
15
{
16
int
lengthOfArrays = object.a.length;
17
this
.a =
new
Date[lengthOfArrays];
18
for
(
int
i = 0; i < lengthOfArrays; i++)
Copy constructor for
Date
19
this
.a[i] =
new
Date(object.a[i]);
20
}
21
public
Date[] getDateArray()
Accessor method
22
{
23
Date[] temp =
new
Date[a.length];
24
for
(
int
i = 0; i < a.length; i++)
25
temp[i] =
new
Date(a[i]);
26
return
temp;
Copy constructor for
Date
27
}
<There presumably are other methods that are not shown,
but they are irrelevant to the point at hand.>
28
}
Self-Test Exercises
18. Define a method named
removeAll
that can be added to the class
PartiallyFilledArray
. The method
removeAll
has no parameters. When
invoked, the method
removeAll
deletes all the elements in its calling object.
19. Define a method named
increaseCapacity
that can be added to the class
PartiallyFilledArray
in Display 6.5. The method has one
int
parameter
named
newCapacity
that increases the capacity of the
PartiallyFilledArray
so
that it can hold up to
newCapacity
numbers. If
newCapacity
is less than or equal
to
maxNumberOfElements
, then the method does nothing. If
newCapacity
is
greater than
maxNumberOfElements
, then
maxNumberElements
is set equal to
newCapacity
and a new array of length
newCapacity
is created for the array
instance variable
a
. The old values of the array instance variable are copied to the
newly created array.
