fast

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

@@ -1,6 +1,7 @@
 package de.hs_mannheim.informatik.bank.domain;
 
 import java.io.Serializable;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashMap;
@@ -62,15 +63,8 @@ public class Bank implements Serializable {
 		case 2: return temp.get(Kontoart.Girokonto);
 		case 3: return temp.get(Kontoart.Tagesgeldkonto);
 		default: 
-			List<Konto> output = null;
-			for(Kontoart key : temp.keySet())
-			{
-				for(Konto k : temp.get(key))
-				{
-					output.add(k);
-				}
-				
-			}
+			List<Konto> output =  temp.values().stream().flatMap(y -> y.stream())
+					.collect(Collectors.toList());			
 			return output;
 		}
 		
@@ -78,44 +72,41 @@ public class Bank implements Serializable {
 	public long findMax()
 	{
 		Collection<Konto> kontenTemp = konten.values();
-	//	Long maxy = kontenTemp.stream().map(n -> n.getKontostand()).reduce(Long::max).get();
 		long max = kontenTemp.stream().map(n -> n.getKontostand()).max((a,b) ->
 		a.compareTo(b)).get();	
 		
-		
 		return max;
 	}
 	public long findmin()
 	{
 		Collection<Konto> kontenTemp = konten.values();
 		
-		long min = 0;
-
-		for(Konto k : kontenTemp)
-		{
-		if(min > k.getKontostand())
-			min = k.getKontostand();				
-		}
+		long min = kontenTemp.stream().map(n -> n.getKontostand()).min((a,b) ->
+		a.compareTo(b)).get();	
 		return min;
 	}
-	public long findaverage()
+	public double findaverage()
 	{
 		
 Collection<Konto> kontenTemp = konten.values();
 		
-		long average = 0;
-		int i = 0;
-		for(Konto k : kontenTemp)
+		double average = kontenTemp.stream().map(n -> n.getKontostand()).
+				collect(Collectors.averagingLong(a -> a));
+		return average;
+		
+	}
+	public Collection<Konto> minus()
 	{
-			i++;
-			average += k.getKontostand();
 		
-		}
+Collection<Konto> kontenTemp = konten.values();
 		
-		return average/i;
+Collection<Konto> minus = kontenTemp.stream().filter(n -> n.getKontostand()<0)
+.collect(Collectors.toList());
 		
+		return minus;
 	}
 	
 	
 	
+	
 }

Bank-Beispiel/src/de/hs_mannheim/informatik/bank/facade/Banksystem.java

@@ -112,5 +112,24 @@ public class Banksystem {
 	{
 		return bank.findMax();
 	}
+	public long findMin()
+	{
+		return bank.findmin();
+	}
+	public double findAvg()
+	{
+		return bank.findaverage();
+	}
+	public String[] unterMinus()
+	{
+		Collection<Konto> konten = bank.minus();
+		String[] liste = new String[konten.size()];
+		int i = 0;
+		for (Konto k : konten) {
+			liste[i++] = k.toString(); 
+		}
+
+		return liste;
+	}
 
 }

Bank-Beispiel/src/de/hs_mannheim/informatik/bank/ui/UI.java

@@ -31,7 +31,8 @@ public class UI {
 				System.out.println("7 -> Saldo abfragen");
 				System.out.println("8: -> Filtering");
 				System.out.println("10: -> find max");
-
+				System.out.println("11: -> find min");
+				System.out.println("12: -> find avg");
 				System.out.println("9 -> Beenden");
 				System.out.println();
 
@@ -52,7 +53,9 @@ public class UI {
 					case 7: saldoAbfragen(); break;
 					case 8: filtering(); break;
 					case 9: break mainloop;
-					case 10: findMax(); 
+					case 10: findMax(); break;
+					case 11: findMin(); break;
+					case 12: findAvg(); break;
 					}
 
 				} catch (Exception e) {
@@ -180,5 +183,16 @@ public class UI {
 	{
 		System.out.println(bs.findMax());
 	}
+	private void findMin()
+	{
+		System.out.println(bs.findMin());
+	}
+	private void findAvg()
+	{
+		System.out.println(bs.findAvg());
+	}
+	private void unterMinus()
+	{
 		
 	}
+}