AV1 Person practice class-Sporedba so equals

package AV1;

import java.util.Objects;

public class FirstClass {
    private String name;
    private String lastName;
    private int age;

    public FirstClass(String name, String lastName, int age) {
        this.name = name;
        this.lastName = lastName;
        this.age = age;
    }

    @Override
    public String toString() {
        return name + " " + lastName + " " + age;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        FirstClass that = (FirstClass) o;
        return age == that.age && Objects.equals(name, that.name) && Objects.equals(lastName, that.lastName);
    }

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

    public static void sporedba(FirstClass p1, FirstClass p2) {
        if (p1.equals(p2)) {
            System.out.println("Isti se");
        } else {
            System.out.println("Ne se isti");
        }
    }

    public static void main(String[] args) {
        FirstClass person1 = new FirstClass("Ivana", "A", 20);
        FirstClass person2 = new FirstClass("Ivana", "A", 20);
        FirstClass person3= new FirstClass("Ivona","A",21);

        sporedba(person1, person2);
        sporedba(person1,person3);

    }
}