Making BigInteger equal another BigInteger variable in Java

Question

I'm wondering is there a way to change a BigInteger variable's value to another BigInteger's value? It seems like 'BigInteger.valueOf' doesn't accept other BigIntegers as its value and neither does 'new BigInteger'.

Answer 1

I didn't read your question carefully enough.

I'm wondering is there a way to change a BigInteger variable's value to another BigInteger's value

No, since BigInteger is immutable.

However, you can create a new BigInteger instance that would have the same value as the original :

One way is to convert to String and construct the copy from that String :

BigInteger source = ...
BigInteger target = new BigInteger (source.toString());

Another way is to use the byte array :

BigInteger target = new BigInteger (source.toByteArray());