(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 55555000o 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

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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(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

Expert Solution

Introduction

Time class UML diagram :

The Time class contains the hour, minute, and second as the private data members of the class. The Time class contains the default constructor, parameterized constructor. The Time class contains the setTime that takes long as milliseconds and converts the milliseconds to the hours, minutes, and seconds.

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