From 8445b7d11b29b870815c3cef137391faac9afca5 Mon Sep 17 00:00:00 2001
From: Stefan Suhren <suhren.stefan@fh-swf.de>
Date: Wed, 15 Oct 2014 15:02:26 +0200
Subject: First commit of my Java1 work.

---
 src/de/fhswf/in/inf/java1/aufgabe1/HelloWorld.java |  45 ++++++++
 src/de/fhswf/in/inf/java1/aufgabe4/Fill.java       | 117 +++++++++++++++++++++
 src/de/fhswf/in/inf/java1/tests/Tests.java         |  31 ++++++
 3 files changed, 193 insertions(+)
 create mode 100644 src/de/fhswf/in/inf/java1/aufgabe1/HelloWorld.java
 create mode 100644 src/de/fhswf/in/inf/java1/aufgabe4/Fill.java
 create mode 100644 src/de/fhswf/in/inf/java1/tests/Tests.java

(limited to 'src/de/fhswf/in/inf')

diff --git a/src/de/fhswf/in/inf/java1/aufgabe1/HelloWorld.java b/src/de/fhswf/in/inf/java1/aufgabe1/HelloWorld.java
new file mode 100644
index 0000000..b80b714
--- /dev/null
+++ b/src/de/fhswf/in/inf/java1/aufgabe1/HelloWorld.java
@@ -0,0 +1,45 @@
+/**
+ * 
+ */
+package de.fhswf.in.inf.java1.aufgabe1;
+
+/**
+ * Begrüßung der Sprache Java. Diese Klasse begrüßt die Sprache Java mit einem
+ * traditionellen "Hello World!".
+ *
+ * @author $Author: $
+ * @version $Revision: $, $Date: $ UTC
+ */
+public final class HelloWorld
+{
+   private HelloWorld()
+   {
+
+   }
+
+   /**
+    * Hauptmethode der Application. Begrüßung der Sprache Java. Diese Klasse
+    * begrüßt die Sprache Java mit einem traditionellen "Hello World!".
+    *
+    * @param args
+    *           Übergabeparameter des Programms.
+    */
+   public static void main(String[] args)
+   {
+      System.out.println("Anzahl der Argumente: " + args.length);
+      if (args.length != 0)
+      {
+         System.out.print("Ihr Name ist:");
+         for (int i = 0; i < args.length; i++)
+         {
+            System.out.print(" " + args[i]);
+         }
+         System.out.println(".");
+      }
+      else
+      {
+         System.out.print("Kein Name vorhanden.");
+      }
+   }
+
+}
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 µs
+      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 µs
+      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 µs
+      Fill.createStringFilledWith3(anzDurchlaefe, 'x'); // Function call
+      // Calculates the time runtime of creatStringFilledWith3()
+      System.out.println("Elapsed time: "
+            + (System.currentTimeMillis() - start) + " ms");
+   }
+}
diff --git a/src/de/fhswf/in/inf/java1/tests/Tests.java b/src/de/fhswf/in/inf/java1/tests/Tests.java
new file mode 100644
index 0000000..ddf711e
--- /dev/null
+++ b/src/de/fhswf/in/inf/java1/tests/Tests.java
@@ -0,0 +1,31 @@
+package de.fhswf.in.inf.java1.tests;
+/**
+ * 
+ * Test-Klasse für kleine Java-Snippets.
+ *
+ * @author $Author:  $
+ * @version $Revision:  $, $Date:  $ UTC
+ */
+public final class Tests
+{
+   private Tests()
+   {
+      
+   }
+   
+   /**
+    * 
+    * Haupt-Methode zum Testen von Java-Snippets.
+    *
+    * @param args
+    *       Übergebene Argumente
+    */
+   public static void main(String[] args)
+   {
+      int a = -1;
+      System.out.println(Integer.toBinaryString(a));
+      System.out.println(Integer.toBinaryString(a >>> 1));
+      
+   }
+
+}
-- 
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