(The Time class)

Design a class named

Time

.

The class contains:

– The data fields

hour

,

minute

, and

second

that represent a time.

– A no-arg constructor that creates a

Time

object for the current time. (The values of the data fields will represent the current time.)

– A constructor that constructs a

Time

object with a specified elapsed time since midnight, January 1, 1970, in milliseconds. (The values of the data fields will represent this time.)

– A constructor that constructs a

Time

object with the specified

hour

,

minute

, and

second

.

– Three getter methods for the data fields

hour

,

minute

, and

second

, respectively.

– A method named

setTime(long elapseTime)

that sets a new time for the object using the elapsed time. For example, if the elapsed time is

555550000

milliseconds, the hour is

10

, the minute is

19

, and the second is

10

.

Draw the UML diagram for the class and then implement the class.

Write a test program that creates two

Time

objects (using

new Time()

,

new Time(555550000)

, and

new Time(5, 23, 55))

and displays their hour, minute, and second in the format hour:minute:second.

(Hint: The first two constructors will extract the hour, minute, and second from the elapsed time. For the no-arg constructor, the current time can be obtained using

System.currentTimeMillis()

, as shown in LiveExample 2.7, ShowCurrentTime.java.)

Class Name:

Exercise10_01