What is the most effective way to create BigInteger instance from int value?

Question

I have a method (in 3rd-party library) with BigInteger parameter:

public void setValue (BigInteger value) { ... }

I don't need 'all its power', I only need to work with integers. So, how can I pass integers to this method? My solution is to get string value from int value and then create BigInteger from string:

int i = 123;
setValue (new BigInteger ("" + i));

Are there any other (recommended) ways to do that?

Answer 1

BigInteger.valueOf(i);

Answer 2

Use the static method BigInteger.valueOf(long number) . int values will be promoted to long automatically.

Answer 3

您可以使用此静态方法： BigInteger.valueOf(long val)

Answer 4

setValue(BigInteger.valueOf(123L));