数字格式化,double小数不用科学计数法--备忘

[luozhangwen]

    public static void main(String[] args) throws Exception
    {       
        doubleToString();
        double aa = 3100000000.125;
        System.out.println(doubleToString(aa));
    }
    
    public static String doubleToString(Object value)
    {
        DecimalFormat df = new DecimalFormat("#,###");
        String strValue = df.format(value);
        return strValue;
    }
    public static void doubleToString()
    {
        double   jellen   =   (1.0/70000000);
        System.out.println(jellen);
        
        NumberFormat   formatter   =   NumberFormat.getNumberInstance();
        formatter.setMaximumFractionDigits(30);     //设置最大小数位
        String   s   =   formatter.format(jellen);
        System.out.println(s); 
    }

[vodown]

有用，备忘