Java, double too large, to avoid showing how to use scientific notation

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1, as far as possible using BigDecimal to replace, double. Although BigDecimal operate some trouble, but at the show, and indeed have an advantage in convenience precision.

2, through experiments, I have come to when the data is greater than 1000W, double scientific notation will be used to show, given the following two ways to solve this problem.

    public static void main(String[] args) {
        double j = 10000000.1;
        System.out.println(j);

        // 方法一
        NumberFormat nf = NumberFormat.getInstance();
        nf.setGroupingUsed(false);
        System.out.println(nf.format(j));
        
        //方法二
        System.out.println(new BigDecimal(j + "").toString());
    }