How can i convert BigDecimal value in BigInteger

Hi Folk!
I am problem i need to change BigDecimal value in BigInteger. Can anybody tell me how can i do it?
I Know how to change a BigInteger value in BigDecimal. Here is the code.
BigInteger bint = BigInteger.valueOf(1231231232);
BigDecimal input2 = new BigDecimal(input);but I have a BigDecimal how can i do the opposite what i have done in code?
Thanks in Advance

I am problem... that's not good.
(Glad to see you got your problem resolved.)

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