BigInteger
) and arbitraryprecision decimal
arithmetic (BigDecimal
).See: Description
Class  Description 

BigDecimal 
Immutable, arbitraryprecision signed decimal numbers.

BigInteger 
Immutable arbitraryprecision integers.

MathContext 
Immutable objects which encapsulate the context settings which
describe certain rules for numerical operators, such as those
implemented by the
BigDecimal class. 
Enum  Description 

RoundingMode 
Specifies a rounding behavior for numerical operations
capable of discarding precision.

BigInteger
) and arbitraryprecision decimal
arithmetic (BigDecimal
). BigInteger
is analogous
to the primitive integer types except that it provides arbitrary
precision, hence operations on BigInteger
s do not overflow
or lose precision. In addition to standard arithmetic operations,
BigInteger
provides modular arithmetic, GCD calculation,
primality testing, prime generation, bit manipulation, and a few
other miscellaneous operations.
BigDecimal
provides arbitraryprecision signed decimal
numbers suitable for currency calculations and the like. BigDecimal
gives the user complete control over rounding behavior,
allowing the user to choose from a comprehensive set of eight
rounding modes.