*10.1 (The Time class) Design a class named Time. The class contains: 1 The data fields hour, minute, and second that represent a time. I A no-arg constructor that creates a Time object for the current time. (The values of the data fields will represent the current time.) 0.indd 401 er 10 Object-Oriented Thinking 1 A constructor that constructs a Time object with a specified elapsed tim since midnight, January 1, 1970, in milliseconds. (The values of the dat fields will represent this time.) I A constructor that constructs a Time object with the specified hour, minute and second. 1 Three getter methods for the data fields hour, minute, and second respectively. I A method named setTime (1ong elapseTime) that sets a new time for th object using the elapsed time. For example, if the elapsed time is 55555000 milliseconds, the hour is 10, the minute is 19, and the second is 10. Draw the UML diagram for the class then implement the class. Write test program that creates three Time objects (using new Time (), nev 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 secon from the elapsed time. For the no-arg constructor, the current time can be obtained using System.currentTimeMillis (), as shown in Listing 2.7 ShowCurrentTime.java. Assume the time is in GMT.)
*10.1 (The Time class) Design a class named Time. The class contains: 1 The data fields hour, minute, and second that represent a time. I A no-arg constructor that creates a Time object for the current time. (The values of the data fields will represent the current time.) 0.indd 401 er 10 Object-Oriented Thinking 1 A constructor that constructs a Time object with a specified elapsed tim since midnight, January 1, 1970, in milliseconds. (The values of the dat fields will represent this time.) I A constructor that constructs a Time object with the specified hour, minute and second. 1 Three getter methods for the data fields hour, minute, and second respectively. I A method named setTime (1ong elapseTime) that sets a new time for th object using the elapsed time. For example, if the elapsed time is 55555000 milliseconds, the hour is 10, the minute is 19, and the second is 10. Draw the UML diagram for the class then implement the class. Write test program that creates three Time objects (using new Time (), nev 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 secon from the elapsed time. For the no-arg constructor, the current time can be obtained using System.currentTimeMillis (), as shown in Listing 2.7 ShowCurrentTime.java. Assume the time is in GMT.)
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
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Transcribed Image Text:*10.1 (The Time class) Design a class named Time. The class contains:
1 The data fields hour, minute, and second that represent a time.
I A no-arg constructor that creates a Time object for the current time. (The
values of the data fields will represent the current time.)
10.indd 401
er 10 Object-Oriented Thinking
I 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.
1 Three getter methods for the data fields hour, minute, and second,
respectively.
I 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 then implement the class. Write a
test program that creates three 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 Listing 2.7,
ShowCurrentTime.java. Assume the time is in GMT.)
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