NIT2112 Calendar Clock and Timezones

Task 1:

Consider implementing a class Clock, which contains the following attribute:

our (an integer from 0 to 23)
minute (an integer from 0 to 59)
second (an integer from 0 to 59)
and the following methods:
void setHour(int h);
//set hour according to h, where h can be any value
void setMinute(int m); //set minute according to m, where m can be any value
void setSecond(int s);
//set second according to s, where s can be any value
int getHour();
//return the current value of hour
int getMinute();
//return the current value of minute
int getSecond();
//return the current value of second
String toString();
//return a String in format of “hh:mm:ss”, for example, “15:45:37”
void addSeconds(int s); //add s seconds to the current time, and adjust minute and hour accordingly,
//where s can be a negative value
void addMinutes(int m); //add m minutes to the current time, and adjust hour accordingly,
//where m can be a negative value
void addHours(int h); //add h hours to the current time.

You are also required to put default constructor and other reasonable constructors to initial the time.

Draw a UML diagram for the class Clock.

Complete the class Clock and write a driven class to run it.

Design a few test cases to test the methods indicated.

Task 2:

Extends the class Clock to a CalendarClock by implementing the following components:

• including information about year, month and day
• toString method will return a string represent the date and time in format "dd/MM/yyyy hh:mm:ss", for example, 02/06/2020 14:30:00 for 2:30 pm of the 2nd of June in year 2020.
• Corresponding get and set methods are required.
• Following methods are required:

void addDays(int d) //add d days to the current date, and adjust month and year
//accordingly, where d can only be a positive value
void addMonths(int m) //add m months to the current date, and adjust year
//accordingly, where m can only be a positive value
void addYears(int y) //add y years to the current date

• You need to consider the influence of a leaf year. A year is defined as:

if year % 100 ==0 and year%400 == 0
year is a leaf year
else if year % 4 == 0
year is a leaf year
else
year is not a leaf year

A leaf year means that there are 29 days for February while there are only 28 days in a normal year.

You are also required to put default constructor and other reasonable constructors to initial the date and time.

Draw a UML diagram for the class CalendarClock with the relatationship to class Clock.

Complete the class CalendarClock and write a driven class to run it.

Design a few test cases to test the methods indicated.

Task 3:

Extends the class Clock to a TimezoneClock by implementing the following components:

• use an integer to represent the time zone, for example, 10 to indicate UTC+10:00, which is Melbourne time, and -5 to indicate UTC-5:00, which is US Eastern time.
• toString method will return a time with timezone information, for example, "14:20:00 UTC+10:00" representing 2:20 pm at UTC+10:00, which is equivalent to 12:20:00 UTC+8:00

You are also required to put default constructor and other reasonable constructors to initial the date and time.

Draw a UML diagram for the class TimezoneClock with the relatationship to class Clock.

Complete the class TimezoneClock and write a driven class to run it.

Design a few test cases to test the methods indicated.

Task 4:

Create a desktop program with JFrame and JPanel to display date and time information in the window.

• Consider a date dd/MM/yyyy dd is the first digit of your student ID MM is the second digit of your student ID yyyy is 2020
• Consider the time 14:50:06 at time zone +Z:00, where Z is the last digit of your student ID
• You need to show the following information in your panel: Current date and time at time zone +Z:00 The corresponding time only for time zone +10:00 The corresponding time only for time zone -5:00