How to convert numbers 2.15600e+03 (Uler) to numeric type?

Question

I have the following problem: I have to read a file that contains several very large numbers as an example below.

When trying to read them and send to a variable double/long/int, the error accusing it is a string. I would like to know how to convert this type of number into double/long/int (whichever is applicable in this case).

Answer 1

Use the class Double to make the conversion:

To long:

long longVar = Double.valueOf("2.15600e+03").longValue();

To double:

double doubleVar = Double.valueOf("2.15600e+03").doubleValue();