Performing digital operation using BigDecimal

Digital calculation, calculation may be performed using the BigDecimal.

String number = "100";
BigDecimal decimal1 = new BigDecimal(number);
String number1 = "10";
BigDecimal decimal2 = new BigDecimal(number1);
System.out.println("加法："+number+"+"+number1+"="+decimal1.add(decimal2).toString());
System.out.println("减法："+number+"-"+number1+"="+decimal1.subtract(decimal2).toString());
System.out.println("乘法："+number+"*"+number1+"="+decimal1.multiply(decimal2).toString());
System.out.println("除法："+number+"/"+number1+"="+decimal1.divide(decimal2).toString());

These are the four basic operations, as well as a mean, I did not write it.

It is important to note that the use

BigDecimal decimal1 = new BigDecimal(number);

When you create a BigDecimal objects, number can not be empty, if empty, then there will be an exception.

This time on the first record to be here, if there are problems later records.