Editing Java Platform, Standard Edition (section)

=== java.math ===
The {{Javadoc:SE|package=java.math|java/math}} package supports [[Arbitrary-precision arithmetic|multiprecision arithmetic]] (including modular arithmetic operations) and provides multiprecision prime number generators used for cryptographic key generation. The main classes of the package are:

* {{Javadoc:SE|java/math|BigDecimal}} – provides arbitrary-precision signed decimal numbers. <code>BigDecimal</code> gives the user control over rounding behavior through <code>RoundingMode</code>.
* {{Javadoc:SE|java/math|BigInteger}} – provides arbitrary-precision integers. Operations on <code>BigInteger</code> do not [[Arithmetic overflow|overflow]] or lose precision. In addition to standard arithmetic operations, it provides [[modular arithmetic]], [[Greatest common divisor|GCD]] calculation, [[primality testing]], [[prime number]] generation, [[bit]] manipulation, and other miscellaneous operations.
* {{Javadoc:SE|java/math|MathContext}}  – encapsulate the context settings that describe certain rules for numerical operators.
* {{Javadoc:SE|java/math|RoundingMode}} – an enumeration that provides eight rounding behaviors.