Assignment No.2 implementations

Implements every function except the main.

4 files changed, 211 insertions, 187 deletions

diff --git a/src/de/fhswf/in/inf/java1/aufgabe5/Bank.java b/src/de/fhswf/in/inf/java1/aufgabe5/Bank.java
index e7c68d7..32fd3f5 100644
--- a/src/de/fhswf/in/inf/java1/aufgabe5/Bank.java
+++ b/src/de/fhswf/in/inf/java1/aufgabe5/Bank.java
@@ -1,36 +1,36 @@
-/**

- * 

- */

-package de.fhswf.in.inf.java1.aufgabe5;

-

-/**

- * TODO Add comment here

- *

- * @author $Author:  $

- * @version $Revision:  $, $Date:  $ UTC

- */

-public final class Bank

-{

-

-   /**

-    * TODO Add constructor comment here

-    *

-    */

-   private Bank()

-   {

-      // TODO Auto-generated constructor stub

-   }

-

-   /**

-    * TODO Add method comment here

-    *

-    * @param args

-    *       Shell arguments

-    */

-   public static void main(String[] args)

-   {

-      // TODO Auto-generated method stub

-

-   }

-

-}

+/**
+ * 
+ */
+package de.fhswf.in.inf.java1.aufgabe5;
+
+/**
+ * Package for main function.
+ *
+ * @author $Author: $
+ * @version $Revision: $, $Date: $ UTC
+ */
+public final class Bank
+{
+
+   /**
+    * Prevents instantiation of the unity class Bank.
+    *
+    */
+   private Bank()
+   {
+
+   }
+
+   /**
+    * Main function for testing the Bank system.
+    *
+    * @param args
+    *           Shell arguments
+    */
+   public static void main(String[] args)
+   {
+      // TODO Auto-generated method stub
+
+   }
+
+}
diff --git a/src/de/fhswf/in/inf/java1/aufgabe5/Konto.java b/src/de/fhswf/in/inf/java1/aufgabe5/Konto.java
index 3d3aed5..24194b3 100644
--- a/src/de/fhswf/in/inf/java1/aufgabe5/Konto.java
+++ b/src/de/fhswf/in/inf/java1/aufgabe5/Konto.java
@@ -1,75 +1,99 @@
-/**

- * 

- */

-package de.fhswf.in.inf.java1.aufgabe5;

-

-import java.math.BigDecimal;

-

-/**

- * TODO Add comment here

- *

- * @author $Author: $

- * @version $Revision: $, $Date: $ UTC

- */

-public class Konto

-{

-

-   private BigDecimal guthaben;

-

-   private BigDecimal dispo;

-

-   private Person besitzer;

-

-   /**

-    * TODO Add constructor comment here

-    *

-    * @param besitzer

-    *           Owner of the account

-    * @param dispo

-    *           Dispo of the account

-    * @param guthaben

-    *           Initial balance of the account

-    */

-   public Konto(Person besitzer, BigDecimal dispo, BigDecimal guthaben)

-   {

-

-      if (besitzer == null)

-      {

-         throw new IllegalArgumentException("Besitzer can't be null");

-      }

-      if (dispo == null)

-      {

-         throw new IllegalArgumentException("Dispo can't be null");

-      }

-      if (guthaben == null)

-      {

-         throw new IllegalArgumentException("Guthaben can't be null");

-      }

-

-      this.besitzer = besitzer;

-      this.dispo = dispo;

-      this.guthaben = guthaben;

-

-   }

-

-   /**

-    * TODO Add method comment here

-    *

-    * @param betrag

-    */

-   public void abheben(BigDecimal betrag)

-   {

-

-   }

-

-   /**

-    * TODO Add method comment here

-    *

-    * @param betrag

-    */

-   public void einzahlen(BigDecimal betrag)

-   {

-

-   }

-

-}

+/**
+ * 
+ */
+package de.fhswf.in.inf.java1.aufgabe5;
+
+import java.math.BigDecimal;
+
+/**
+ * An implementation of the Konto class wich represents a bank account.
+ *
+ * @author $Author: $
+ * @version $Revision: $, $Date: $ UTC
+ */
+public class Konto
+{
+
+   private BigDecimal guthaben;
+
+   private BigDecimal dispo;
+
+   private Person besitzer;
+
+   /**
+    * Creates an account with an owner, a dispo and an initial balance.
+    *
+    * @param besitzer
+    *           Owner of the account
+    * @param dispo
+    *           Dispo of the account
+    * @param guthaben
+    *           Initial balance of the account
+    */
+   public Konto(Person besitzer, BigDecimal dispo, BigDecimal guthaben)
+   {
+
+      if (besitzer == null)
+      {
+         throw new IllegalArgumentException("Besitzer can't be null");
+      }
+      if (dispo == null)
+      {
+         throw new IllegalArgumentException("Dispo can't be null");
+      }
+      if (guthaben == null)
+      {
+         throw new IllegalArgumentException("Guthaben can't be null");
+      }
+
+      this.besitzer = besitzer;
+      this.dispo = dispo;
+      this.guthaben = guthaben;
+
+   }
+
+   /**
+    * Function for withdrawing money from the account.
+    *
+    * @param betrag
+    *           Amount of cash to be withdrawn
+    */
+   public void abheben(BigDecimal betrag)
+   {
+      if (betrag == null)
+      {
+         throw new IllegalArgumentException("Betrag can't be null");
+      }
+      if (betrag.compareTo(BigDecimal.ZERO) < 0)
+      {
+         throw new IllegalArgumentException("Betrag can't be negative");
+      }
+      if (guthaben.add(dispo).compareTo(betrag) >= 0)
+      {
+         throw new IllegalArgumentException("Betrag surpasses dispo limit");
+      }
+
+      guthaben = guthaben.subtract(betrag);
+   }
+
+   /**
+    * Function to deposit money into the account.
+    *
+    * @param betrag
+    *           Amount of cash to be disposed
+    */
+   public void einzahlen(BigDecimal betrag)
+   {
+      if (betrag == null)
+      {
+         throw new IllegalArgumentException("Betrag can't be null");
+      }
+      if (betrag.compareTo(BigDecimal.ZERO) < 0)
+      {
+         throw new IllegalArgumentException("Betrag can't be negative");
+      }
+
+      guthaben = guthaben.add(betrag);
+   }
+
+}
diff --git a/src/de/fhswf/in/inf/java1/aufgabe5/Person.java b/src/de/fhswf/in/inf/java1/aufgabe5/Person.java
index 24824ae..bd7fb8a 100644
--- a/src/de/fhswf/in/inf/java1/aufgabe5/Person.java
+++ b/src/de/fhswf/in/inf/java1/aufgabe5/Person.java
@@ -1,48 +1,48 @@
-/**

- * 

- */

-package de.fhswf.in.inf.java1.aufgabe5;

-

-/**

- * TODO Add comment here

- *

- * @author $Author: $

- * @version $Revision: $, $Date: $ UTC

- */

-public class Person

-{

-   private String vorname;

-

-   private String nachname;

-

-   /**

-    * TODO Add constructor comment here

-    *

-    * @param vorname

-    *           First name of the person

-    * @param nachname

-    *           Last name of the person

-    */

-   public Person(String vorname, String nachname)

-   {

-      if (vorname == null)

-      {

-         throw new IllegalArgumentException("Vorname can't be null");

-      }

-      if (nachname == null)

-      {

-         throw new IllegalArgumentException("Nachname can't be null");

-      }

-      if (vorname == "")

-      {

-         throw new IllegalArgumentException("Vorname can't be empty");

-      }

-      if (nachname == "")

-      {

-         throw new IllegalArgumentException("Nachname can't be empty");

-      }

-      this.vorname = vorname;

-      this.nachname = nachname;

-   }

-

-}

+/**
+ * 
+ */
+package de.fhswf.in.inf.java1.aufgabe5;
+
+/**
+ * A person which can own an account.
+ *
+ * @author $Author: $
+ * @version $Revision: $, $Date: $ UTC
+ */
+public class Person
+{
+   private String vorname;
+
+   private String nachname;
+
+   /**
+    * Creates a person with first and last name.
+    *
+    * @param vorname
+    *           First name of the person
+    * @param nachname
+    *           Last name of the person
+    */
+   public Person(String vorname, String nachname)
+   {
+      if (vorname == null)
+      {
+         throw new IllegalArgumentException("Vorname can't be null");
+      }
+      if (nachname == null)
+      {
+         throw new IllegalArgumentException("Nachname can't be null");
+      }
+      if (vorname == "")
+      {
+         throw new IllegalArgumentException("Vorname can't be empty");
+      }
+      if (nachname == "")
+      {
+         throw new IllegalArgumentException("Nachname can't be empty");
+      }
+      this.vorname = vorname;
+      this.nachname = nachname;
+   }
+
+}
diff --git a/src/de/fhswf/in/inf/java1/aufgabe5/Student.java b/src/de/fhswf/in/inf/java1/aufgabe5/Student.java
index 50856cc..769c91a 100644
--- a/src/de/fhswf/in/inf/java1/aufgabe5/Student.java
+++ b/src/de/fhswf/in/inf/java1/aufgabe5/Student.java
@@ -1,28 +1,28 @@
-/**

- * 

- */

-package de.fhswf.in.inf.java1.aufgabe5;

-

-/**

- * TODO Add comment here

- *

- * @author $Author: $

- * @version $Revision: $, $Date: $ UTC

- */

-public class Student extends Person

-{

-

-   /**

-    * TODO Add constructor comment here

-    *

-    * @param vorname

-    *           First name of the student

-    * @param nachname

-    *           Last name of the student

-    */

-   public Student(String vorname, String nachname)

-   {

-      super(vorname, nachname);

-   }

-

-}

+/**
+ * 
+ */
+package de.fhswf.in.inf.java1.aufgabe5;
+
+/**
+ * Extends Person and represents a student.
+ *
+ * @author $Author: $
+ * @version $Revision: $, $Date: $ UTC
+ */
+public class Student extends Person
+{
+
+   /**
+    * Simply calls the super constructor to initialize person.
+    *
+    * @param vorname
+    *           First name of the student
+    * @param nachname
+    *           Last name of the student
+    */
+   public Student(String vorname, String nachname)
+   {
+      super(vorname, nachname);
+   }
+
+}