Question

• Write a class Date with:
• Three instance variable : day, month and year all of type int.
• Define the following public methods for the class Date:

• • A constructor Date() without parameter, make the date 1-1-2000  
  • A constructor Date(int d, int m, int y) with parameters that provide the values attributes.
  • Include accessor methods:
    • getDay
    • getMonth
    • getYear
  • Include mutator methods:
    • setDay: make sure that day between 1 to 30
    • setMonth: make sure that month between 1 to 12
    • setYear
  • A method increment() : that adds one day to the current date. Make sure that after increment if day more than 30 , increment month by one and make day 1
• Write a method displaydetail() that displays the month, day and year separated by forward slashes (/)
• Complete the following datetest class

     public class datetest {

      public static void main(String[] args) {

       Scanner S = new Scanner(System.in);

                 int d , m, y;

// 1- define object(d1) of date class without initialize value.

……………………………………………………………………………………….

// 2- define object(d2) of date class with initialize value ( 23,5,2016)

…………………………………………………………………………………….

System.out.print("Enter year: ");   int y = S.nextInt();

System.out.print("Enter month: ");  int m = S.nextInt();

System.out.print("Enter day: ");   int d= S.nextInt();

  //3- set the value day of d1 to  d

……………………………………………………..

//4-set the value month of d1 to m

………………………………………………………

//5- set the value year of d1 to y

…………………………………………………….

//6-increment d2

…………………………………

//7-print d1

…………………….

// 8-print only the month of d2

…………………………………….

//9-print only the year of d1

………………………………………..}  }

Answer 1

/* JAVA Program to implement teh Date Class with constructor, Accessor, mutator method and
all other methods*/

import java.util.*;
/*class Date */
class Date
{
   //Data fields
   private int day;
   private int month;
   private int year;

   //default constructor
   public Date()
       {
           day=0;
           month=0;
           year=0;
       }

   //Parameterised constructor toinitialise Date object
   public Date(int d,int m,int y)
           {
               day=d;
               month=m;
               year=y;
           }

       //Accessor method for day
       int getDay()
           {
           return day;
           }

       //Accessor method for month
       int getMonth()
               {
               return month;
               }

       //Accessor method for year
       int getYear()
               {
                   return year;
               }

       //Mutator method for day
       void setDay(int d)
                   {
                   day=d;
                   }

       //Mutator method for month
       void setMonth(int m)
                   {
                   month=m;
                   }

       //Mutator method for year
       void setYear(int y)
                   {
                   year=y;
                   }
       //increment() to increase day by 1
       void increment()
           {
               day=day+1;
               if(day>30) //if day>30, then month=month+1 and day=1
                       {
                           month=month+1;
                           day=1;
                       }
           }
       //This mwthod display the date with slash.
       void displaydetail()
           {
               System.out.println(month + "/" + day + "/" + year);
           }

}

/*Test class as provided in Question*/
public class datetest
   {

public static void main(String[] args)
   {

        Scanner S = new Scanner(System.in);

           // 1- define object(d1) of date class without initialize value.
           Date d1=new Date();

           // 2- define object(d2) of date class with initialize value ( 23,5,2016)
           Date d2=new Date(23,5,2016);

           System.out.print("Enter year: "); int y = S.nextInt();

           System.out.print("Enter month: "); int m = S.nextInt();

           System.out.print("Enter day: "); int d= S.nextInt();

           //3- set the value day of d1 to d
           d1.setDay(d);

           //4-set the value month of d1 to m
           d1.setMonth(m);

           //5- set the value year of d1 to y

           d1.setYear(y);

           //6-increment d2

           d2.increment();

           //7-print d1

           d1.displaydetail();

           // 8-print only the month of d2

           System.out.println("Month of d2 " + d2.getMonth());

           //9-print only the year of d1

           System.out.println("Year of d1 " + d1.getYear());

           }
       }

/////////////////////////////////////////////////////////

// OUTPUT

///////////////////////////////////////////////////////////