Stats Test_ipynb_2_ • 2 min read

public class Main {
    public static void main(String[] args) {
        // Example test data
        Map<String, List<Double>> lists = new HashMap<>();

        // Add data
        lists.put("A", Arrays.asList(1.0, 2.0, 3.0));
        lists.put("B", Arrays.asList(4.0, 5.0));
        lists.put("C", Arrays.asList(6.0, 7.0, 8.0, 9.0));
        lists.put("D", Arrays.asList(10.0));

        System.out.println(lists.entrySet());

        Set<Map.Entry<String, List<Double>>> entrySet = lists.entrySet();

        if (!entrySet.isEmpty()) {
            // Using iterator
            Iterator<Map.Entry<String, List<Double>>> iterator = entrySet.iterator();
            Map.Entry<String, List<Double>> firstEntry = iterator.next();
            List<Double> valueOfFirstEntry = firstEntry.getValue();
            System.out.println("Value of the first entry: " + valueOfFirstEntry);
        } else {
            System.out.println("Map is empty");
        }
        

        // Print the test data
        for (Map.Entry<String, List<Double>> entry : lists.entrySet()) {
            String key = entry.getKey();
            List<Double> values = entry.getValue();
            System.out.println("Key: " + key + ", Values: " + values);
        }
        
    }
}

Main.main(null);

[A=[1.0, 2.0, 3.0], B=[4.0, 5.0], C=[6.0, 7.0, 8.0, 9.0], D=[10.0]]
Value of the first entry: [1.0, 2.0, 3.0]
Key: A, Values: [1.0, 2.0, 3.0]
Key: B, Values: [4.0, 5.0]
Key: C, Values: [6.0, 7.0, 8.0, 9.0]
Key: D, Values: [10.0]