如何将带有整型数组的双精度数转换为ToString覆盖？

public class Main {
    public static void main(String[] args) {
        int[] intArray = {1, 2, 3, 4, 5};
        double doubleNumber = 3.14;

        // 将整型数组转换为双精度数
        doubleNumber = convertIntArrayToDouble(intArray);

        // 将双精度数转换为字符串
        String result = convertDoubleToString(doubleNumber);

        System.out.println(result);
    }

    private static double convertIntArrayToDouble(int[] intArray) {
        double result = 0.0;
        for (int num : intArray) {
            result += num;
        }
        return result;
    }

    private static String convertDoubleToString(double doubleNumber) {
        return Double.toString(doubleNumber);
    }
}