import org.apache.commons.math3.stat.descriptive.DescriptiveStatistics; public class MathExample { public static void main(String[] args) { double[] data = {1.2, 2.4, 3.6, 4.8, 6.0}; DescriptiveStatistics stats = new DescriptiveStatistics(); for (double value : data) { stats.addValue(value); } double mean = stats.getMean(); double variance = stats.getVariance(); System.out.println("Mean: " + mean); System.out.println("Variance: " + variance); } }