如何自定义setRandom的范围？

public void setRandom(int min, int max) {
    Random random = new Random();
    int randomNumber = random.nextInt(max - min + 1) + min;
    this.randomNumber = randomNumber;
}

enum Range {
    LOW(1, 10),
    MEDIUM(11, 20),
    HIGH(21, 30);

    private final int min;
    private final int max;

    Range(int min, int max) {
        this.min = min;
        this.max = max;
    }

    public int getMin() {
        return min;
    }

    public int getMax() {
        return max;
    }
}

public void setRandom() {
    Random random = new Random();
    int randomIndex = random.nextInt(Range.values().length);
    Range range = Range.values()[randomIndex];
    int randomNumber = random.nextInt(range.getMax() - range.getMin() + 1) + range.getMin();
    this.randomNumber = randomNumber;
}

// 配置文件范例：range.json
{
  "min": 1,
  "max": 100
}

public void setRandom() {
    try (InputStream inputStream = getClass().getResourceAsStream("range.json")) {
        JSONObject config = new JSONObject(new JSONTokener(inputStream));
        int min = config.getInt("min");
        int max = config.getInt("max");
        Random random = new Random();
        int randomNumber = random.nextInt(max - min + 1) + min;
        this.randomNumber = randomNumber;
    } catch (IOException e) {
        e.printStackTrace();
    }
}