Question

Write a Java object class Cat with the member variables (fields) color, breed, birthday, and weight. Create an empty constructor and overload that constructor and have it accept values for each member variable. There should be manipulator (setter) and accessor (getter) methods for each member variable. Ensure the Cat object has a toString() method. The accessor method for the birthday should return the date in the format MM/DD/YYYY. Add an accessor method getAgeInYears() that calculates how many years old the cat is based on the birthday. Use java.util.Date as the data type for the birthday.

Answer 1

import java.time.LocalDate;
import java.time.Period;
import java.util.Date;
class Cat {
   private String color;
   private String breed;
   private double weight;
   private Date birthday;

   public Cat() {

   }

   public Cat(String aColor, String aBreed, double aWeight, Date aBirthday) {
       super();
       color = aColor;
       breed = aBreed;
       weight = aWeight;
       birthday = aBirthday;
   }

   public String getColor() {
       return color;
   }

   public void setColor(String aColor) {
       color = aColor;
   }

   public String getBreed() {
       return breed;
   }

   public void setBreed(String aBreed) {
       breed = aBreed;
   }

   public double getWeight() {
       return weight;
   }

   public void setWeight(double aWeight) {
       weight = aWeight;
   }

   public Date getBirthday() {
       return birthday;
   }

   public void setBirthday(Date aBirthday) {
       birthday = aBirthday;
   }

   public int getAgeInYears() {
       LocalDate today = LocalDate.now(); //Today's date
       LocalDate b = LocalDate.of(birthday.getYear(), birthday.getMonth(), birthday.getDay()); //Birth date
       Period period = Period.between(b, today);
       return period.getYears();
   }
}

public class TestCat {
   public static void main(String[] args) {
       Date d = new Date(1994,3,23);
       Cat c = new Cat("Black","Local",20,d);
       System.out.println(c.getAgeInYears());
   }
}