Data commit

Task/Executable-library/Java/executable-library-2.java

@@ -0,0 +1,20 @@
+import java.util.HashMap;
+import java.util.Map;
+import java.util.stream.IntStream;
+
+public class ExecutableLibrary {
+
+    public static void main(String[] args) {
+        Map<Integer,Integer> lengthMap = new HashMap<>();
+        IntStream.range(1, 100_000)
+                 .map(n -> HailstoneSequence.hailstoneSequence(n).size())
+                 .forEach(len -> lengthMap.merge(len, 1, (v1, v2) -> v1 + v2));
+        int mostOften = lengthMap.values()
+                                 .stream()
+                                 .mapToInt(x -> x)
+                                 .max().orElse(-1);
+
+        System.out.printf("The most frequent hailstone length for n < 100,000 is %d.%n", mostOften);
+    }
+
+}