Demo - The equals Method and Hash -Person Class

package ClassEqualDemo;
//Person Class - Demo of Equal and hash

import java.util.Objects;

public class Person {
    //variables**************
    private String firstName;
    private String lastName;
    private int age;

    //Constructor
    public Person(String firstName, String lastName, int age) {
        this.firstName = firstName;
        this.lastName = lastName;
        this.age = age;
    }

    // Getters and Setters
    public String getFirstName() {
        return firstName;
    }
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
    public String getLastName() {
        return lastName;
    }
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    //Override Functions
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Person person = (Person) o;
        return age == person.age && Objects.equals(firstName, person.firstName) && Objects.equals(lastName, person.lastName);
    }

    @Override
    public int hashCode() {
        return Objects.hash(firstName, lastName, age);
    }
}

Driver:

package ClassEqualDemo;

public class ClassEqualDriver {
    public static void main(String[] args)
    {
        //create some Persons
        Person personOne = new Person("Kevin", "Roark", 29);
        Person personTwo = new Person("Fred", "Flintstone", 39);
        Person personThree = new Person("Kevin", "Roark", 29);
        //Now find out if they are equal
        System.out.println("Is personOne equal to personTwo:");
        if(personOne.equals(personTwo))
        {
            System.out.println("The objects are equal");
        }
        else
        {
            System.out.println("The objects are NOT equal");
        }

        System.out.println("Is personOne equal to personThree:");
        if(personOne.equals(personThree))
        {
            System.out.println("The objects are equal");
        }
        else
        {
            System.out.println("The objects are NOT equal");
        }

        //now print out the Hash values
        System.out.println("The Hash values for each object are:");
        System.out.println("personOne: " + personOne.hashCode());
        System.out.println("personTwo: " + personTwo.hashCode());
        System.out.println("personThree: " + personThree.hashCode());

    }
}