Hist4j

Hist4j is an excellent open-source histogram library designed for use in Java environments. This library can handle datasets of any size and with any distribution or range, all while maintaining a minuscule memory footprint. Hist4j does not require any pre-processing or post-processing before use, making it a highly convenient option for developers. Additionally, Hist4j is equipped with several statistical functions which make it all the more impressive.

Currently, Hist4j offers two main statistical functions. One of these functions is the cumulative density function, which serves to graph the cumulative probabilities of data points in a data set. The second function is designed to identify the data point that splits the data set at a given percentile, a mathematical value ranking one part of the data set against the whole as a percentage value.

It is essential to note that Hist4j is entirely developed, licensed and provided under the terms and conditions of Apache License 2.0. This makes Hist4j a highly secure and trustworthy option for those who want to use histogram-based libraries without having to worry about any potential licensing issues. If you're looking for a reliable and cost-effective histogram library for your Java application, Hist4j is an ideal choice.