1 files changed, 117 insertions, 0 deletions
diff --git a/src/de/fhswf/in/inf/java1/aufgabe4/Fill.java b/src/de/fhswf/in/inf/java1/aufgabe4/Fill.java
new file mode 100644
index 0000000..20fdd84
--- /dev/null
+++ b/src/de/fhswf/in/inf/java1/aufgabe4/Fill.java
@@ -0,0 +1,117 @@
+/**
+ * 
+ */
+package de.fhswf.in.inf.java1.aufgabe4;
+
+import java.util.Arrays;
+
+/**
+ * Tests the different methods to created a prefilled String.
+ *
+ * @author $Author: $
+ * @version $Revision: $, $Date: $ UTC
+ */
+public final class Fill
+{
+   private Fill()
+   {
+   }
+
+   /**
+    * 
+    * Creates a string of given length filled with the given char.
+    *
+    * @param length
+    *           Length of the returned String.
+    * @param c
+    *           Char the String is filled with.
+    * @return Returns the generated String.
+    */
+   public static String createStringFilledWith(int length, char c)
+   {
+      // String that will be returned
+      String result = "";
+      for (int i = 0; i < length; i++)
+      {
+         // Every iteration, a new string is created.
+         result += c;
+      }
+      // Return the build string
+      return result;
+   }
+
+   /**
+    * 
+    * Creates a string of given length filled with the given char.
+    *
+    * @param length
+    *           Length of the returned String.
+    * @param c
+    *           Char the String is filled with.
+    * @return Returns the generated String.
+    */
+   public static String createStringFilledWith2(int length, char c)
+   {
+      // charArray that will be returned
+      char[] result = new char[length];
+
+      Arrays.fill(result, c);
+
+      // Return the build string
+      return result.toString();
+   }
+
+   /**
+    * 
+    * Creates a string of given length filled with the given char.
+    *
+    * @param length
+    *           Length of the returned String.
+    * @param c
+    *           Char the String is filled with.
+    * @return Returns the generated String.
+    */
+   public static String createStringFilledWith3(int length, char c)
+   {
+      // String that will be returned
+      StringBuilder result = new StringBuilder(length);
+      for (int i = 0; i < length; i++)
+      {
+         // Every iteration, a new string is created.
+         result.append(c);
+      }
+      // Return the build string
+      return result.toString();
+   }
+
+   /**
+    * 
+    * Calls the function createStringFilledWith() and measures its runtime.
+    *
+    * @param args
+    *           Console line arguments.
+    */
+   public static void main(String[] args)
+   {
+      final int anzDurchlaefe = 100000000;
+
+      long start;
+      start = System.currentTimeMillis(); // Gets current time in 盜
+      Fill.createStringFilledWith(anzDurchlaefe, 'x'); // Function call
+      // Calculates the time runtime of creatStringFilledWith()
+      System.out.println("Elapsed time: "
+            + (System.currentTimeMillis() - start) + " ms");
+
+      start = System.currentTimeMillis(); // Gets current time in 盜
+      Fill.createStringFilledWith2(anzDurchlaefe, 'x'); // Function call
+      // Calculates the time runtime of creatStringFilledWith2()
+      System.out.println("Elapsed time: "
+            + (System.currentTimeMillis() - start) + " ms");
+
+      start = System.currentTimeMillis(); // Gets current time in 盜
+      Fill.createStringFilledWith3(anzDurchlaefe, 'x'); // Function call
+      // Calculates the time runtime of creatStringFilledWith3()
+      System.out.println("Elapsed time: "
+            + (System.currentTimeMillis() - start) + " ms");
+   }
+}