update

Task/Averages-Mean-angle/Java/averages-mean-angle.java

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+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class RAvgMeanAngle {
+
+  private static final List<List<Double>> samples;
+
+  static {
+    samples = new ArrayList<>();
+    samples.add(Arrays.asList(350.0, 10.0));
+    samples.add(Arrays.asList(90.0, 180.0, 270.0, 360.0));
+    samples.add(Arrays.asList(10.0, 20.0, 30.0));
+    samples.add(Arrays.asList(370.0));
+    samples.add(Arrays.asList(180.0));
+  }
+
+  public RAvgMeanAngle() {
+
+    return;
+  }
+
+  public double getMeanAngle(List<Double> sample) {
+
+    double x_component = 0.0;
+    double y_component = 0.0;
+    double avg_d, avg_r;
+
+    for (double angle_d : sample) {
+      double angle_r;
+      angle_r = Math.toRadians(angle_d);
+      x_component += Math.cos(angle_r);
+      y_component += Math.sin(angle_r);
+    }
+    x_component /= sample.size();
+    y_component /= sample.size();
+    avg_r = Math.atan2(y_component, x_component);
+    avg_d = Math.toDegrees(avg_r);
+
+    return avg_d;
+  }
+
+  public static void main(String[] args) {
+
+    runSample(args);
+
+    return;
+  }
+
+  public static void runSample(String[] args) {
+
+    RAvgMeanAngle main = new RAvgMeanAngle();
+    for (List<Double> sample : samples) {
+      double meanAngle = main.getMeanAngle(sample);
+      System.out.printf("The mean angle of %s is:%n%12.6f%n%n", sample, meanAngle);
+    }
+
+    return;
+  }
+}