Java summary statistics

Java can produce summary statistics for a collection. We can retrieve the Iris dataset and put it into a collection before producing the statistics directly.

I have copied the file from http://archive.ics.uci.edu/ml/machine-learning-databases/iris/iris.data to make the processing a little smoother.

We read in the Iris data and then call upon collections to produce a summary.

The code for this example is as follows:

import java.io.IOException; 
import java.nio.file.FileSystems; 
import java.nio.file.Files; 
import java.nio.file.Path; 
import java.text.DateFormat; 
import java.util.ArrayList; 
import java.util.List; 
import java.util.Map; 
import java.util.Optional; 
import java.util.regex.Pattern; 
import java.util.stream.Collectors; 
import java.util.stream.Stream; 
 
public class Iris { 
     
    public Iris(Double sepalLength, Double sepalWidth, Double 
     petalLength, Double petalWidth, String irisClass) { 
        this.sepalLength = sepalLength; 
        this.sepalWidth...