import de.jungblut.math.DoubleMatrix; import de.jungblut.math.DoubleVector; import de.jungblut.math.dense.DenseDoubleVector; public class MeanCalculator { public static void main(String[] args) { DenseDoubleVector.Builder vectorBuilder = new DenseDoubleVector.Builder(); TextFileReader reader = new TextFileReader("input.txt"); String line; while ((line = reader.readLine()) != null) { double number = Double.parseDouble(line); vectorBuilder.add(number); } reader.close(); DoubleVector vector = vectorBuilder.build(); double sum = vector.sum(); double mean = sum / vector.getLength(); } }