java 魔法值

int daysInYear = 365;

public static final int DAYS_IN_YEAR = 365;
int days = DAYS_IN_YEAR;

public enum TimeUnit {
    DAYS(365),
    HOURS(24);

    private final int value;

    TimeUnit(int value) {
        this.value = value;
    }

    public int getValue() {
        return value;
    }
}

days.in.year=365

Properties properties = new Properties();
try (InputStream input = new FileInputStream("config.properties")) {
    properties.load(input);
}
int daysInYear = Integer.parseInt(properties.getProperty("days.in.year"));

public void process(int days) {
    // 处理逻辑
}

public class MagicNumberExample {
    public static final int DAYS_IN_YEAR = 365;
    public static final double PI = 3.14159;

    public static void main(String[] args) {
        int days = DAYS_IN_YEAR;
        double area = calculateCircleArea(5.0);
        System.out.println("Days in year: " + days);
        System.out.println("Circle area: " + area);
    }

    public static double calculateCircleArea(double radius) {
        return PI * radius * radius;
    }
}