LottoNumber.java

package com.javabom.lotto.domain.ticket;

import java.util.Objects;

public class LottoNumber {
    public static final int MIN_LOTTO_NUM = 1;
    public static final int MAX_LOTTO_NUM = 45;

    private final int number;

    public LottoNumber(int number) {
        validateNumber(number);
        this.number = number;
    }

    private void validateNumber(int number) {
        if (number < MIN_LOTTO_NUM || number > MAX_LOTTO_NUM) {
            throw new IllegalArgumentException("로또 번호는 1~45 입니다.");
        }
    }

    public int get() {
        return number;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        LottoNumber that = (LottoNumber) o;
        return number == that.number;
    }

    @Override
    public int hashCode() {
        return Objects.hash(number);
    }
}