1 files changed, 119 insertions, 0 deletions
diff --git a/src/de/fhswf/in/inf/java1/aufgabe05/Konto.java b/src/de/fhswf/in/inf/java1/aufgabe05/Konto.java
new file mode 100644
index 0000000..235f9af
--- /dev/null
+++ b/src/de/fhswf/in/inf/java1/aufgabe05/Konto.java
@@ -0,0 +1,119 @@
+/**
+ * 
+ */
+package de.fhswf.in.inf.java1.aufgabe05;
+
+import java.math.BigDecimal;
+
+/**
+ * An implementation of the Konto class which 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
+    */
+   public Konto(Person besitzer, BigDecimal dispo)
+   {
+
+      if (besitzer == null)
+      {
+         throw new IllegalArgumentException("Besitzer can't be null");
+      }
+      if (dispo == null)
+      {
+         throw new IllegalArgumentException("Dispo can't be null");
+      }
+      if (dispo.compareTo(BigDecimal.ZERO) < 0)
+      {
+         throw new IllegalArgumentException("Dispo can't be negative");
+      }
+
+      this.besitzer = besitzer;
+      this.dispo = dispo;
+      this.guthaben = new BigDecimal(0);
+      
+      this.besitzer.addKonto(this);
+
+   }
+
+   /**
+    * 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+    *           Amount of cash to be withdrawn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);
+   }
+
+   /**
+    * Returns the actual balance.
+    *
+    * @return Returns the actual balance.
+    */
+   public BigDecimal getKontostand()
+   {
+      return guthaben;
+   }
+
+   /**
+    * Just to get the owners name.
+    *
+    * @return Returns the owners name.
+    */
+   public Person getBesitzer()
+   {
+      return besitzer;
+   }
+
+}