Done

src/de/hs_mannheim/informatik/bank/Main.java

@@ -3,10 +3,12 @@ package de.hs_mannheim.informatik.bank;
 
 import de.hs_mannheim.informatik.bank.UI.UI;
 import de.hs_mannheim.informatik.bank.facade.Banksystem;
+import persistance.Read;
 
 public class Main {
 
 	public static void main(String[] args) {
+		Read r = new Read();
 		Banksystem bs = new Banksystem("Spaßkasse Mannheim");
 		UI ui = new UI(bs);
 	}

src/de/hs_mannheim/informatik/bank/UI/UI.java

@@ -31,6 +31,8 @@ public class UI {
 				System.out.println("4 -> Auszahlen");
 				System.out.println("5 -> Kontostand Suchen");
 				System.out.println("6 -> Verlauf Zeigen");
+				System.out.println("7 -> Speichern");
+				System.out.println("8 -> laden");
 				System.out.println("9 -> Beenden");
 				System.out.println();
 
@@ -45,6 +47,11 @@ public class UI {
 					case 4: ausziehen(); break;
 					case 5: standSuchen(); break;					
 					case 6: zeigeVerlauf(); break;
+					case 7: speichern(); break;
+					case 8: laden(); break;
+					
+
+
 					
 					case 9: break mainloop;
 				}
@@ -128,5 +135,32 @@ public class UI {
 		
 		
 	}
+	private void speichern()
+	{
+		if(bs.speichern())
+		{
+			System.out.println("Date gespeichert");
+			return;
+		}else
+		{
+			System.out.println("Ein Fehler ist aufgetreten");
+		}
+		
+	}
+	private void laden() 
+	{
+		try {
+		if(bs.laden())
+		{
+			System.out.println("Data gespeichert");
+			return;
+		}
+		}
+		catch(ClassNotFoundException a)
+		{
+			System.out.println("Ein Fehler ist aufgetreten");
+
+		}
+	}
 
 }

src/de/hs_mannheim/informatik/bank/domain/Bank.java

@@ -5,10 +5,23 @@ package de.hs_mannheim.informatik.bank.domain;
 import java.util.Collection;
 import java.util.HashMap;
 
+import persistance.Read;
+import persistance.Write;
+
 public class Bank {
 	private String name;
 	private HashMap<Integer, Konto> konten = new HashMap<>();
 	
+	public HashMap<Integer, Konto> getKonten() {
+		return konten;
+	}
+
+
+	public void setKonten(HashMap<Integer, Konto> konten) {
+		this.konten = konten;
+	}
+	
+
 	public Bank(String name) {
 		this.name = name;
 	}
@@ -25,6 +38,13 @@ public class Bank {
 		return konten.values();
 	}
 	
+	public boolean save()
+	{
+		Write w = new Write();
+		return w.saveFile(konten);
+		
+	}
+	
 	
 	
 }

src/de/hs_mannheim/informatik/bank/domain/Konto.java

@@ -1,9 +1,10 @@
 package de.hs_mannheim.informatik.bank.domain;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 
-public class Konto {
+public class Konto implements Serializable{
 	private static int kontozähler = 0;
 	private List<Long> history = new ArrayList<Long>();
 	

src/de/hs_mannheim/informatik/bank/facade/Banksystem.java

@@ -2,12 +2,15 @@ package de.hs_mannheim.informatik.bank.facade;
 
 
 
-import java.util.ArrayList;
+import java.io.IOException;
 import java.util.Collection;
+import java.util.HashMap;
 import java.util.List;
 
 import de.hs_mannheim.informatik.bank.domain.Bank;
 import de.hs_mannheim.informatik.bank.domain.Konto;
+import persistance.Read;
+import persistance.Write;
 
 public class Banksystem {
 	private Bank bank;
@@ -100,5 +103,21 @@ public class Banksystem {
 		
 		return null;
 	}
+	public boolean laden() throws ClassNotFoundException
+	{
+		Read r = new Read();
+		HashMap<Integer,Konto> x = r.load();
+		if(x == null) return false;
+		bank.setKonten(r.load());
+		return true;
+	
+	}
+	public boolean speichern() 
+	{
+		Write w = new Write();
+		return w.saveFile(bank.getKonten());
+		
+		
+	}
 
 }

src/persistance/Read.java

@@ -0,0 +1,29 @@
+package persistance;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.util.HashMap;
+
+import de.hs_mannheim.informatik.bank.domain.Konto;
+
+public class Read {
+	
+	public HashMap<Integer,Konto> load() throws ClassNotFoundException  
+	{
+		try {
+		ObjectInputStream ois = new ObjectInputStream(new FileInputStream("object.ser"));
+		HashMap<Integer, Konto> map =  (HashMap<Integer, Konto>) ois.readObject();
+		ois.close();
+		return map;
+		} catch(IOException   e )
+		{
+			return null;
+		}
+		
+	
+		
+	}
+
+}

src/persistance/Write.java

@@ -0,0 +1,35 @@
+package persistance;
+
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.ObjectOutputStream;
+import java.util.HashMap;
+
+import de.hs_mannheim.informatik.bank.domain.Konto;
+
+public class Write {
+
+	public boolean saveFile(HashMap<Integer, Konto> data) 
+	{
+		
+		try{
+			 FileOutputStream fos =new FileOutputStream("object.ser");
+        ObjectOutputStream oos = new ObjectOutputStream(fos);
+        oos.writeObject(data);
+        fos.close();
+        oos.close();
+
+        return true;
+		}
+		catch(IOException  a)
+		{
+			System.out.println("tff");
+			return false;
+			
+		}
+		
+		
+		 
+	}
+}