This week\'s programming part of the assignment is closely related to the exerci

Question

This week's programming part of the assignment is closely related to the exercise on the recorded video link about writing class definitions (Chapter 10 of the Zelle book). You should write a class definition about a "time" class. The class defines a time object to have the instance variables "hours" and "minutes". As with all class definitions there should be a constructor. Also you should implement getter methods for both instance variables. Then there should be a method that can set at time. Define a method for returning a string that can be used to print a given time. And you also should enable this class to add and subtract time expressions with corresponding methods. Then you should write a main program that uses/tests all the methods.

Explanation / Answer

public class Date

{

String hours,time;

public void sethours(String hours)

{

this.hours=hours;

}

public String gethours()

{

return hours;

}

public void settime(String time)

{

this.time=time;

}

public String gettime()

{

return time;

}

}

import java.util.*;
import java.text.*;

public class DateExample {
   public static void main(String args[]) {

       // Instantiate a Date object
       Date date = new Date();

       // Get current date and time
      
       // 1st way: current time and date using toString()
       System.out.println("Today's date is: "+date.toString());

       // 2nd way: current time and date using SimpleDateFormat
       SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy hh:mm:ss");
       System.out.println("Today's date is: "+dateFormat.format(date));

       // Convert string to date
       SimpleDateFormat dateformat2 = new SimpleDateFormat("dd-M-yyyy hh:mm:ss");
       String strdate2 = "02-04-2013 11:35:42";
       try {
           Date newdate = dateformat2.parse(strdate2);
           System.out.println(newdate);
       } catch (ParseException e) {
           e.printStackTrace();
       }
      

       // Date Comparison
  
       // 1st way: using before(), after(), equals()
       SimpleDateFormat dateformat3 = new SimpleDateFormat("dd/MM/yyyy");
       try {
           Date date1 = dateformat3.parse("17/07/1989");
           Date date2 = dateformat3.parse("15/10/2007");
          
           System.out.println("Date1 is: "+dateformat3.format(date1));
           System.out.println("Date2 is: "+dateformat3.format(date2));

           if (date1.after(date2)) {
               System.out.println("Date1 is later than Date2");
           }else if (date1.before(date2)) {
               System.out.println("Date1 is earlier than Date2");
           }else if (date1.equals(date2)) {
               System.out.println("Date1 is the same with Date2");
           }

           // 2nd way: using compareTo()
           date1 = dateformat3.parse("27/09/2012");
           date2 = dateformat3.parse("27/09/2009");

           System.out.println("Date1 is: "+dateformat3.format(date1));
           System.out.println("Date2 is: "+dateformat3.format(date2));

           if (date1.compareTo(date2) > 0) {
               System.out.println("Date1 is later than Date2");
           } else if (date1.compareTo(date2) < 0) {
               System.out.println("Date1 is earlier than Date2");
           } else if (date1.compareTo(date2) == 0) {
               System.out.println("Date1 is the same with Date2");
           }

       } catch (ParseException e) {
           e.printStackTrace();
       }

   }
}

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