From ed5ad940a99e7e6386caa85fd01588a64220fa22 Mon Sep 17 00:00:00 2001
From: Stefan Suhren <suhren.stefan@fh-swf.de>
Date: Wed, 5 Nov 2014 00:55:06 +0100
Subject: Assignment No.6 added first version

---
 src/de/fhswf/in/inf/java1/aufgabe6/Aufgabe6.java   |  81 ++++++++++++++++
 .../fhswf/in/inf/java1/aufgabe6/ListBenchmark.java | 102 +++++++++++++++++++++
 2 files changed, 183 insertions(+)
 create mode 100644 src/de/fhswf/in/inf/java1/aufgabe6/Aufgabe6.java
 create mode 100644 src/de/fhswf/in/inf/java1/aufgabe6/ListBenchmark.java

(limited to 'src/de/fhswf')

diff --git a/src/de/fhswf/in/inf/java1/aufgabe6/Aufgabe6.java b/src/de/fhswf/in/inf/java1/aufgabe6/Aufgabe6.java
new file mode 100644
index 0000000..ddb82d1
--- /dev/null
+++ b/src/de/fhswf/in/inf/java1/aufgabe6/Aufgabe6.java
@@ -0,0 +1,81 @@
+/**
+ * 
+ */
+package de.fhswf.in.inf.java1.aufgabe6;
+
+import java.util.Iterator;
+import java.util.Vector;
+
+import de.fhswf.in.inf.java1.aufgabe4.Fill;
+
+/**
+ * Main function for testing Vectors and Lists.
+ *
+ * @author $Author: $
+ * @version $Revision: $, $Date: $ UTC
+ */
+public final class Aufgabe6
+{
+
+   /**
+    * Prevents instantiation of the utility class.
+    *
+    */
+   private Aufgabe6()
+   {
+   }
+
+   /**
+    * Main function for testing Vectors and Lists.
+    *
+    * @param args
+    *           Command line arguments.
+    */
+   public static void main(String[] args)
+   {
+      final int testLength = 100000000;
+      Vector<Integer> test = new Vector<>(testLength);
+      Integer testGet;
+
+      for (int i = 0; i < test.capacity(); i++)
+      {
+         test.add(i);
+      }
+
+      long start;
+      start = System.currentTimeMillis(); // Gets current time in µs
+
+      for (int i = 0; i < test.size(); i++)
+      {
+         testGet = test.elementAt(i);
+      }
+
+      // Calculates the runtime of for
+      System.out.println("Elapsed time: "
+            + (System.currentTimeMillis() - start) + " ms");
+
+      start = System.currentTimeMillis(); // Gets current time in µs
+
+      for (Iterator<Integer> it = test.iterator(); it.hasNext();)
+      {
+         testGet = it.next();
+      }
+
+      // Calculates the runtime of for
+      System.out.println("Elapsed time: "
+            + (System.currentTimeMillis() - start) + " ms");
+
+      start = System.currentTimeMillis(); // Gets current time in µs
+
+      for (Integer integer : test)
+      {
+         testGet = integer;
+      }
+
+      // Calculates the runtime of foreach
+      System.out.println("Elapsed time: "
+            + (System.currentTimeMillis() - start) + " ms");
+
+   }
+
+}
diff --git a/src/de/fhswf/in/inf/java1/aufgabe6/ListBenchmark.java b/src/de/fhswf/in/inf/java1/aufgabe6/ListBenchmark.java
new file mode 100644
index 0000000..a98cdd6
--- /dev/null
+++ b/src/de/fhswf/in/inf/java1/aufgabe6/ListBenchmark.java
@@ -0,0 +1,102 @@
+/**
+ * 
+ */
+package de.fhswf.in.inf.java1.aufgabe6;
+
+import java.util.List;
+import java.util.Random;
+
+/**
+ * TODO Add comment here
+ *
+ * @author $Author: $
+ * @version $Revision: $, $Date: $ UTC
+ */
+public final class ListBenchmark
+{
+
+   private final Integer testObj = new Integer(214);
+
+   /**
+    * Prevents instantiation of the utility class.
+    *
+    */
+   private ListBenchmark()
+   {
+   }
+
+   /**
+    * Starts a benchmark of different Lists and different test cases.
+    *
+    */
+   public void startBenchmark()
+   {
+
+   }
+
+   /**
+    * TODO Add method comment here
+    *
+    * @param list
+    * @param times
+    * @return
+    */
+   private long benchmarkAtBeginning(List<Integer> list, int times)
+   {
+      long start = System.currentTimeMillis(); // Gets current time in µs
+
+      for (int i = 0; i < times; i++)
+      {
+         list.add(0, testObj);
+      }
+
+      return (System.currentTimeMillis() - start); // Returns runtime
+   }
+
+   /**
+    * TODO Add method comment here
+    *
+    * @param list
+    * @param times
+    * @return
+    */
+   private long benchmarkAtEnding(List<Integer> list, int times)
+   {
+      long start = System.currentTimeMillis(); // Gets current time in µs
+
+      for (int i = 0; i < times; i++)
+      {
+         list.add(testObj);
+      }
+
+      return (System.currentTimeMillis() - start); // Returns runtime
+   }
+
+   /**
+    * TODO Add method comment here
+    *
+    * @param list
+    * @param times
+    * @return
+    */
+   private long benchmarkAtRandom(List<Integer> list, int times)
+   {
+
+      int[] randVal = new int[times];
+      Random rand = new Random();
+
+      for (int i = 0; i < randVal.length; i++)
+      {
+         randVal[i] = rand.nextInt(list.size()+i+1);
+      }
+
+      long start = System.currentTimeMillis(); // Gets current time in µs
+
+      for (int i = 0; i < times; i++)
+      {
+         list.add(randVal[i], testObj);
+      }
+
+      return (System.currentTimeMillis() - start); // Returns runtime
+   }
+}
-- 
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