How Do I convert very big String to number in Java

Question

Hi I have a big string like this :

"999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999"

I wish to convert this string to long. But I failed. I did:

Long.parseLong(longString);

But I'm getting an error:

java.lang.NumberFormatException: For input string: "99999999.......

Are there any way to avoid this?

Answer 1

Use BigInteger class like this:

 BigInteger number = new BigInteger(longString);

Answer 2

You need to use BigInteger. Long may not accommodate that big number.

Here is javadoc for BigInteger.