Homework SourseWrite a class definition not a program there is no main meth
Write a class definition (not a program, there is no main method) named Geek (saved in a file Geek.java) that models a person who is a geek. For our purposes, a geek is someone who delights in answering all sorts of questions, such as “is this string a palindrome?”, “what is the sum of all numbers between two numbers?” among other things. A Geek has a name and also keeps track of how many questions s/he has answered.
Your Geek class must have:
• Only two instance variables - the Geek’s name and number of questions asked so far.
• public Geek(String name, int numQuestions) - Constructor - sets the Geek’s name and the number of questions asked. • public String getName() - Takes no parameters and returns the Geek’s name as a String (don’t count this request in the total questions).
• public int getNumberOfQuestions() - Takes no parameters and returns as an int how many questions has been asked (don’t count this request in the total).
• public boolean isEven(int num1, int num2) - It takes two integers and returns a boolean value indicating if the sum of the numbers is even or not (this counts as the Geek being asked one more question, so update the appropriate instance variable).
• public int sum(int num1, int num2) - Takes two integers and returns an int which is the sum of all numbers between the two inclusive (include the numbers in the sum) - for full credit this method should work even if the two numbers are the same (the sum is just one of the numbers) or if the first number is larger than the second. Also, you cannot assume which number will be greater.
• public boolean leapYear(int year)
- It takes an integer and returns a boolean value indicating if the year is a leap year. A leap year is one with 366 days. A year is a leap year if:
– it is divisible by 4 (for example, 1980), – except that it is not a leap year if it is divisible by 100 (for example 1900);
– however, it is a leap year if it is divisible by 400 (for example, 2000).
There were no exceptions before the introduction of the Gregorian calendar on October 15, 1582 (for example, 1500 was a leap year). You may NOT use Java’s GregorianCalendar class. (This counts as the Geek being asked one more question, so update the appropriate instance variable).
Save the Geek class in a file called Geek.java. Write a test driver called Assignment5.java with the main method to create a new Geek object and to test the methods in the class Geek. A sample output is shown below.
Assignment5.java will provide the following menu to the user. Based on the user’s choice, the program needs to perform corresponding operation. This will be done by calling (invoking) one of the methods you defined in the Geek class. The program will terminate when the user enters ’q’.
------------------------------------------------------------------
Command Options:
a : get name
b: number of questions asked
c: sum is even d: sum between two integers e: leap year ?: display the menu again
q: quit this program Here is the description for each option: a: asks for the Geek’s name b: returns the number of questions asked so far c: asks for two integers and prints if the sum of the numbers is even d: asks for two integers and returns the sum of all numbers between them, inclusive
e: asks for an integer and returns if it is a leap year or not ?: displays the menu
q: quits
-----------------------------------------------------
Sample Output:
(user input is in bold)
Command Options
———————————–
a : get name
b: number of questions asked
c: sum is even
d: sum between two integers
e: leap year
?: display the menu again
q: quit this program
Please enter a command or type? a
Name: Geek
Please enter a command or type? b
Number of questions: 0
Please enter a command or type? c
Enter a number: 3
Enter the second number: 3
The sum of the numbers is even
Please enter a command or type? c
Enter a number: 3
Enter the second number: 4
The sum of the numbers is odd
Please enter a command or type? b
Number of questions: 2
Please enter a command or type? d
Enter a number: 1
Enter a second number: 10
The sum between 1 and 10 is 55
Please enter a command or type? d
Enter the first number: 7
Enter the second number: 4
The sum between 4 and 7 is 22
Please enter a command or type? b
Number of questions: 4
Please enter a command or type? e
Enter a year: 1900
1900 is not a leap year
Please enter a command or type? e
Enter a year: 1996
1996 is a leap year.
Please enter a command or type? e
Enter a year: 2000
2000 is a leap year
Please enter a command or type? b
Number of questions: 7
Please enter a command or type? q
Press any key to continue . . .
Solution
// Geek.java
public class Geek
{
String name;
int numQuestions = 0;
public Geek (String name, int numQuestions)
{
this.name = name;
this.numQuestions = numQuestions;
}
public String getName()
{
return name;
}
public int getNumberOfQuestions()
{
return numQuestions;
}
public boolean isEven(int num1, int num2)
{
numQuestions++;
int sum = num1+num2;
if (sum%2 == 0)
return true;
else
return false;
}
public int sum(int num1, int num2)
{
int sum = 0;
if (num1 < num2)
{
for (int i = num1; i <= num2 ;i++ )
{
sum = sum + i;
}
}
else if(num1 > num2)
{
for (int i = num2; i <= num1 ;i++ )
{
sum = sum + i;
}
}
else
{
sum = num1;
}
numQuestions++;
return sum;
}
public boolean leapYear(int year)
{
numQuestions++;
if(year%400 == 0)
return true;
else
return false;
}
}
// Assignment5.java
import java.util.Scanner;
public class Assignment5
{
public static void main(String[] args)
{
Scanner scan = new Scanner(System.in);
String menu = \"Command Options\ ---------------------\ a: Geek\'s Name\ b: Num Questions Asked\ c: sum is even\ d: sum between two integers\ e: leap year\ ? Display\ q: Quit\ \ \";
boolean again = true;
Geek geek = new Geek(\"Geek\",0);
System.out.println(menu);
int num1,num2;
int year;
while (again)
{
System.out.print(\"Please enter a command or type? \");
char input = scan.next().charAt(0);
switch(input)
{
case \'a\': System.out.println(geek.getName());
break;
case \'b\': System.out.println(geek.getNumberOfQuestions());
break;
case \'c\':
System.out.print(\"Enter a number: \");
num1 = scan.nextInt();
System.out.print(\"Enter the second number: \");
num2 = scan.nextInt();
if(geek.isEven(num1,num2) == true)
System.out.println(\"The sum of the numbers is even\");
else
System.out.println(\"The sum of the numbers is odd\");
break;
case \'d\':
System.out.print(\"Enter the first number: \");
num1 = scan.nextInt();
System.out.print(\"Enter the second number: \");
num2 = scan.nextInt();
if(num1 <= num2)
System.out.print(\"The sum between \" + num1 +\" and \" + num2 + \" is \");
else
System.out.print(\"The sum between \" + num2 +\" and \" + num1 + \" is \");
System.out.println(geek.sum(num1, num2));
break;
case \'e\':
System.out.print(\"Enter a year: \");
year = scan.nextInt();
if(geek.leapYear(year) == false)
System.out.println(year+\" is not a leap year\");
else
System.out.println(year+\" is a leap year\");
break;
case \'?\': System.out.println(menu);
break;
case \'q\': again = false;
break;
}
}
}
}
/*
output:
Command Options
---------------------
a: Geek\'s Name
b: Num Questions Asked
c: sum is even
d: sum between two integers
e: leap year
? Display
q: Quit
Please enter a command or type? a
Geek
Please enter a command or type? b
0
Please enter a command or type? c
Enter a number: 3
Enter the second number: 3
The sum of the numbers is even
Please enter a command or type? c
Enter a number: 3
Enter the second number: 4
The sum of the numbers is odd
Please enter a command or type? d
Enter the first number: 1
Enter the second number: 10
The sum between 10 and 1 is 55
Please enter a command or type? d
Enter the first number: 7
Enter the second number: 4
The sum between 4 and 7 is 22
Please enter a command or type? b
4
Please enter a command or type? e
Enter a year: 1996
1996 is not a leap year
Please enter a command or type? e
Enter a year: 2000
2000 is a leap year
Please enter a command or type? e
Enter a year: 1900
1900 is not a leap year
Please enter a command or type? b
7
Please enter a command or type? q
*/
