[usth/ICT2.2] Object Oriented Programming

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diff --git a/usth/ICT2.2/labwork/2/my-app/src/main/java/com/mycompany/app/MeanSTD.java b/usth/ICT2.2/labwork/2/my-app/src/main/java/com/mycompany/app/MeanSTD.java
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+++ b/usth/ICT2.2/labwork/2/my-app/src/main/java/com/mycompany/app/MeanSTD.java
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+package com.mycompany.app;
+
+import java.util.Arrays;
+
+// Exercise 8
+public class MeanSTD
+{
+  public static void main(String... args)
+  {
+    double n = args.length;
+    double m = Arrays.stream(args).mapToDouble(Double::parseDouble).sum() / n;
+    double s = Math.sqrt(
+      Arrays.stream(args)
+      .mapToDouble(x -> Math.pow(Double.parseDouble(x) - m, 2)).sum() / n);
+    System.out.printf("Mean: %f\nStandard deviation: %f\n", m, s);
+  }
+}