Custom model class example

Cat.java

package com.company;

//Name of the class
public class Cat {
    //Private variables
    private int age;
    private String name;

    //Private constant
    private final boolean isMale;

    //Constructor
    public Cat(int age, String name, boolean isMale) {
        this.age = age;
        this.name = name;
        this.isMale = isMale;
    }

    //Accessors (a.k.a. getters)
    public int getAge() {
        return age;
    }

    public String getName() {
        return name;
    }

    public boolean isMale() {
        return isMale;
    }

    //Modifiers (a.k.a. setters)

    /**
     * Sets the age for the current cat
     *
     * @param age an integer with the valid values between 0 and 25
     * @return true if value has been assigned and false if the parameter is invalid
     */
    public boolean setAge(int age) {
        //Validate your parameters, valid age for a cat is between 0 and 25 years
        if (age > 0 && age < 25) {
            this.age = age;
            return true;
        }
        return false;
    }

    public void setName(String name) {
        this.name = name;
    }

    //We cannot provide a setter for a constant, it has to be specified through a constructor

    //@toString method allows you to print information about the current object.

    @Override
    public String toString() {

        String gender = "Female";

        if (isMale) {
            gender = "Male";
        }

        return String.format("Name: %s\nAge: %s\nGender: %s", name, age, gender);
    }
}