Java Reference
In-Depth Information
6
private int
hour;
// 0 - 23
7
private int
minute;
// 0 - 59
8
private int
second;
// 0 - 59
9
10
// Time2 no-argument constructor:
11
// initializes each instance variable to zero
12
public
Time2()
13
{
14
this
(
0
,
0
,
0
);
// invoke constructor with three arguments
15
}
16
17
// Time2 constructor: hour supplied, minute and second defaulted to 0
18
public
Time2(
int
hour)
19
{
20
this
(hour,
0
,
0
);
// invoke constructor with three arguments
21
}
22
23
// Time2 constructor: hour and minute supplied, second defaulted to 0
24
public
Time2(
int
hour,
int
minute)
25
{
26
this
(hour, minute,
0
);
// invoke constructor with three arguments
27
}
28
29
// Time2 constructor: hour, minute and second supplied
30
public
Time2(
int
hour,
int
minute,
int
second)
31
{
32
if
(hour <
0
|| hour >=
24
)
33
throw new
IllegalArgumentException(
"hour must be 0-23"
);
34
35
if
(minute <
0
|| minute >=
60
)
36
throw new
IllegalArgumentException(
"minute must be 0-59"
);
37
38
if
(second <
0
|| second >=
60
)
39
throw new
IllegalArgumentException(
"second must be 0-59"
);
40
41
this
.hour = hour;
42
this
.minute = minute;
43
this
.second = second;
44
}
45
46
// Time2 constructor: another Time2 object supplied
47
public
Time2(Time2 time)
48
{
49
// invoke constructor with three arguments
this
(time.getHour(), time.getMinute(), time.getSecond());
50
51
}
52
53
// Set Methods
54
// set a new time value using universal time;
55
// validate the data
56
public void
setTime(
int
hour,
int
minute,
int
second)
57
{
Fig. 8.5
|
Time2
class with overloaded constructors. (Part 2 of 4.)
