The Apache Commons Math project is a library of lightweight, self-contained mathematics and statistics components addressing the most common practical problems not immediately available in the Java programming language or commons-lang. 官方案例文档 org.apache.commons.math4.stat - statistics, statistical tests org.apache.commons.math4.analysis - rootfinding, integration, interpolation, polynomials org.apache.commons.math4.random - random numbers, strings and data generation org.apache.commons.math4.special - special functions (Gamma, Beta) org.apache.commons.math4.linear - matrices, solving linear systems org.apache.commons.math4.util -