在Java中安全地计算两个数的平均值的方法

public class AverageCalculator {
    public static double calculateAverage(String num1, String num2) {
        try {
            double n1 = Double.parseDouble(num1);
            double n2 = Double.parseDouble(num2);
            double sum = n1 + n2;
            double average = sum / 2;
            return average;
        } catch (NumberFormatException e) {
            System.out.println("输入的数字格式不正确");
            return 0;
        }
    }

    public static void main(String[] args) {
        String num1 = "10";
        String num2 = "20";
        double average = calculateAverage(num1, num2);
        System.out.println("平均值为：" + average);
    }
}