public class Date { private int month; private int day; private int year; /** default constructor...

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Question

public class Date { private int month; private int day; private int year; /** default constructor...

public class Date {
private int month;
private int day;
private int year;

/** default constructor
* sets month to 1, day to 1 and year to 2000
*/
public Date( ) {
setDate( 1, 1, 2000 );
}

/** overloaded constructor
* @param mm initial value for month
* @param dd initial value for day
* @param yyyy initial value for year
*
* passes parameters to setDate method
*/
public Date( int mm, int dd, int yyyy ) {
setDate( mm, dd, yyyy );
}

/* accessor methods */
int getMonth( ) { return month; }
int getDay( ) { return day; }
int getYear( ) { return year; }

/** mutator method */
/** setDate
* @param mm new value for month
* @param dd new value for day
* @param yyyy new value for year
* passes parameters to setMonth, setDay, and setYear
*/
public void setDate( int mm, int dd, int yyyy ) {
setYear(yyyy);
setMonth( mm );
setDay( dd );
}

/** helper methods */
/** setDay
* @param dd new value for day
* if dd is legal day for current month, sets day to dd
* otherwise, sets day to 1
*/
private void setDay( int dd ) {
int [] validDays = { 0, 31, 29, 31, 30,
31, 30, 31, 31, 30,
31, 30, 31 };
day = ( dd >= 1 && dd <= validDays[month] ? dd : 1 );
}
/** setMonth
* @param mm new value for month
* if mm is between 1 and 12, sets month to mm
* otherwise, sets month to 1
*/
private void setMonth( int mm ) {
month = ( mm >= 1 && mm <= 12 ? mm : 1 );
}
/** setYear
* @param yyyy new value for year
* sets year to yyyy
*/
private void setYear( int yyyy ) {
year = yyyy;
}

/** toString
* @return String
* returns date in mm/dd/yyyy format
*/
public String toString( ) {
return month + "/" + day + "/" + year;
}

/** equals
* @param d Date object to compare to this
* @return true if d is equal to this
* false, otherwise
*/
public boolean equals( Date d ) {
if ( month == d.month
&& day == d.day
&& year == d.year )
return true;
else
return false;
}
}

We need to use this Data class to add to the DataClient class, which is

public class DateClient
{
public static void main( String [] args )
{
// add code to construct Data objects
   // and test and output if they are a
   // leap year or not

   // not leap year (not divisible by 4)

// leap year (divisible by 4, but not by 100)

// not leap year (divisible by 4 and by 100)

// leap year (divisible by 4 and by 100 and by 400)

}

Below are the rules to determine if a year is a leap year.

Every year divisible by 4 is a leap year,
But every year divisible by 100 is NOT a leap year,
Unless the year is also divisible by 400, then it is still a leap year.

engineering Computer-Science

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Answer 1

Answer #1

Screenshot

$public class DateClient <terminated> DateClient [Java Application] C:\Pr 1/1/2000 is a leap year 5/10/2006 is not a leap year$

Program

DateClient.java

public class DateClient
{
public static void main( String [] args )
{
// add code to construct Date objects
// and test and output if they are a
// leap year or not
// not leap year (not divisible by 4)
// leap year (divisible by 4, but not by 100)
// not leap year (divisible by 4 and by 100)
// leap year (divisible by 4 and by 100 and by 400)

   //Test object1
   Date date1=new Date();
   if (((date1.getYear() % 4 == 0) && (date1.getYear() % 100!= 0)) || (date1.getYear()%400 == 0))
        System.out.println(date1+" is a leap year");
     else
        System.out.println(date1+" is not a leap year");
   //Test object2
       Date date2=new Date(5,10,2006);
       if (((date2.getYear() % 4 == 0) && (date2.getYear() % 100!= 0)) || (date2.getYear()%400 == 0))
            System.out.println(date2+" is a leap year");
         else
            System.out.println(date2+" is not a leap year");
       //Test object3
       Date date3=new Date(32,10,1978);
       if (((date3.getYear() % 4 == 0) && (date3.getYear() % 100!= 0)) || (date3.getYear()%400 == 0))
            System.out.println(date3+" is a leap year");
         else
            System.out.println(date3+" is not a leap year");
}
}

Date.java

public class Date {
private int month;
private int day;
private int year;

/** default constructor
* sets month to 1, day to 1 and year to 2000
*/
public Date( ) {
setDate( 1, 1, 2000 );
}

/** overloaded constructor
* @param mm initial value for month
* @param dd initial value for day
* @param yyyy initial value for year
*
* passes parameters to setDate method
*/
public Date( int mm, int dd, int yyyy ) {
setDate( mm, dd, yyyy );
}

/* accessor methods */
int getMonth( ) { return month; }
int getDay( ) { return day; }
int getYear( ) { return year; }

/** mutator method */
/** setDate
* @param mm new value for month
* @param dd new value for day
* @param yyyy new value for year
* passes parameters to setMonth, setDay, and setYear
*/
public void setDate( int mm, int dd, int yyyy ) {
setYear(yyyy);
setMonth( mm );
setDay( dd );
}

/** helper methods */
/** setDay
* @param dd new value for day
* if dd is legal day for current month, sets day to dd
* otherwise, sets day to 1
*/
private void setDay( int dd ) {
int [] validDays = { 0, 31, 29, 31, 30,
31, 30, 31, 31, 30,
31, 30, 31 };
day = ( dd >= 1 && dd <= validDays[month] ? dd : 1 );
}
/** setMonth
* @param mm new value for month
* if mm is between 1 and 12, sets month to mm
* otherwise, sets month to 1
*/
private void setMonth( int mm ) {
month = ( mm >= 1 && mm <= 12 ? mm : 1 );
}
/** setYear
* @param yyyy new value for year
* sets year to yyyy
*/
private void setYear( int yyyy ) {
year = yyyy;
}

/** toString
* @return String
* returns date in mm/dd/yyyy format
*/
public String toString( ) {
return month + "/" + day + "/" + year;
}

/** equals
* @param d Date object to compare to this
* @return true if d is equal to this
* false, otherwise
*/
public boolean equals( Date d ) {
if ( month == d.month
&& day == d.day
&& year == d.year )
return true;
else
return false;
}
}

------------------------------

Output

1/1/2000 is a leap year
5/10/2006 is not a leap year
1/10/1978 is not a leap year

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Answer 2

public class Date { private int month; private int day; private int year; /** default constructor...

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public class Date { private int month; private int day; private int year; /** default constructor...

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