public class Man {

    private String noseSize;
    private String eyesColor;
    private String haircut;
    private boolean scars;
    private int dnaCode;

    public Man(String noseSize, String eyesColor, String haircut, boolean scars, int dnaCode) {
        this.noseSize = noseSize;
        this.eyesColor = eyesColor;
        this.haircut = haircut;
        this.scars = scars;
        this.dnaCode = dnaCode;
    }
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Man man = (Man) o;
        return dnaCode == man.dnaCode;
    }
//геттеры сеттеры и тд

public class Test {
    public static void main(String[] args) {
        Man man1 = new Man("Большой", "Зеленый", "Горшок", true, 13);
        Man man2 = new Man("Большой", "Зеленый", "Горшок", true, 13);
        System.out.println(man1.hashCode());
    }
}

public class Test {
    public static void main(String[] args) {
        Man man1 = new Man("Большой", "Зеленый", "Горшок", true, 13);
        Man man2 = new Man("Большой", "Зеленый", "Горшок", true, 13);
        System.out.println(man1.hashCode() + "  " + man2.hashCode());
    }
}

1802598046  659748578



 public class Test {
        public static void main(String[] args) {
            Man man1 = new Man("Большой", "Зеленый", "Горшок", true, 13);
            Man man2 = new Man("Большой", "Зеленый", "Горшок", true, 13);
            System.out.println(man1.hashCode() + "  " + man2.hashCode());
        }
    }