How do you convert A binary number to a BigInteger in Java?

Question

I needed to convert a very big binary value into its decimal equivalent. As it is a big integer I was using BigInteger. So how do I convert this binary number to a BigInteger?

Accepted Answer

If you have the `String` representation of your binary number, provide it to this overloaded `BigInteger` constructor to create an instance:

```
BigInteger(String val, int radix);
```

In your case, radix is clearly 2, i.e. you can use something like this:

```
BigInteger yourNumber = new BigInteger("101000101110...1010", 2);
```

How do you convert A binary number to a BigInteger in Java?

Solution

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