Apfloat is a high performance arbitrary precision arithmetic library. You can perform calculations with a precision of millions of digits with it. It's as simple to use as Java's BigDecimal or BigInteger classes, but performs a lot better with extreme precision numbers (more than a few hundred digits). Also, a full suite of mathematical functions for arbitrary precision numbers are available: all those existing in java.lang.Math and more. Apfloat is distributed under the terms of the MIT License and comes with NO WARRANTIES.

Highlights:

• Pi calculator - Calculate a million digits of pi (or more)
• Version 1.16.0 - Download the apfloat library
• Calculator applet - Online arbitrary precision calculator

The apfloat library is also available via Maven.

The source code repository is in GitHub.

Apfloat requires Java 8 or later.

A C++ version is also available.