abstract class : An abstract class is a class which may or may not include abstract methods and cannot be instantiated but rather can be sub classed. Program Code: Filename: TestCalendar.Java //Import the packages import java.util.; //class definition public class TestCalendar { //main function definition public static void main(String[] args) { / Construct a Gregorian calendar for the current date and time*/ Calendar calendar = new GregorianCalendar(); //print current time by using object Calender System. out .println("Current time is " + new Date()); System. out .println("YEAR: " + calendar.get(Calendar. YEAR )); System. out .println("MONTH: " + calendar.get(Calendar. MONTH )); System. out .println("DATE: " + calendar.get(Calendar. DATE )); System. out .println("HOUR: " + calendar.get(Calendar. HOUR )); System. out .println("HOUR_OF_DAY: " + calendar.get(Calendar. HOUR_OF_DAY )); System. out .println("MINUTE: " + calendar.get(Calendar. MINUTE )); System. out .println("SECOND: " + calendar.get(Calendar. SECOND )); //print the current day of the week System. out .println("DAY_OF_WEEK: " calendar.get(Calendar. DAY_OF_WEEK )); //print the current day of the month System. out .println("DAY_OF_MONTH: " + calendar.get(Calendar. DAY_OF_MONTH )); //print the current day of the year System. out .println("DAY_OF_YEAR: " + calendar.get(Calendar. DAY_OF_YEAR )); //print the current week of the month System. out .println("WEEK_OF_MONTH: " + calendar.get(Calendar. WEEK_OF_MONTH )); //print the current week of the year System. out .println("WEEK_OF_YEAR: " + calendar.get(Calendar. WEEK_OF_YEAR )); //print whether time is in A.M or P.M. System. out .println("AM_PM: " + calendar.get(Calendar. AM_PM )); // Construct a calendar for December 25, 1997 Calendar calendar1 = new GregorianCalendar(1997, 11, 25); String[] dayNameOfWeek = {"Sunday", "Monday", "Tuesday", "Wednesday","Thursday", "Friday", "Saturday"}; //print day of the week System. out .println("December 25, 1997 is a " + dayNameOfWeek[calendar1.get(Calendar. DAY_OF_WEEK ) - 1]); } }

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Chapter 13.4, Problem 13.4.2CP

Program Plan Intro

abstract class:

An abstract class is a class which may or may not include abstract methods and cannot be instantiated but rather can be sub classed.

Program Code:

Filename: TestCalendar.Java

//Import the packages

import java.util.;

//class definition

public class TestCalendar

{

//main function definition

public static void main(String[] args)

{

/ Construct a Gregorian calendar for the current date and time*/

    Calendar calendar = new GregorianCalendar();

//print current time by using object Calender

System.out.println("Current time is " + new Date());

System.out.println("YEAR: " + calendar.get(Calendar.YEAR));

System.out.println("MONTH: " + calendar.get(Calendar.MONTH));

System.out.println("DATE: " + calendar.get(Calendar.DATE));

System.out.println("HOUR: " + calendar.get(Calendar.HOUR));

    System.out.println("HOUR_OF_DAY: " +

    calendar.get(Calendar.HOUR_OF_DAY));

System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));

System.out.println("SECOND: " + calendar.get(Calendar.SECOND));

//print the current day of the week

System.out.println("DAY_OF_WEEK: " calendar.get(Calendar.DAY_OF_WEEK));

//print the current day of the month

    System.out.println("DAY_OF_MONTH: " +

     calendar.get(Calendar.DAY_OF_MONTH));

//print the current day of the year

    System.out.println("DAY_OF_YEAR: " +

     calendar.get(Calendar.DAY_OF_YEAR));

//print the current week of the month

    System.out.println("WEEK_OF_MONTH: " +

     calendar.get(Calendar.WEEK_OF_MONTH));

//print the current week of the year

    System.out.println("WEEK_OF_YEAR: " +

     calendar.get(Calendar.WEEK_OF_YEAR));

//print whether time is in A.M or P.M.

System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));

    // Construct a calendar for December 25, 1997

Calendar calendar1 = new GregorianCalendar(1997, 11, 25);

String[] dayNameOfWeek = {"Sunday", "Monday", "Tuesday", "Wednesday","Thursday", "Friday", "Saturday"};

//print day of the week

    System.out.println("December 25, 1997 is a " +

        dayNameOfWeek[calendar1.get(Calendar.DAY_OF_WEEK) - 1]);

}

}

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