UE19

src/UE14_130225_Streams1/UE14_Streams1.java

@@ -3,6 +3,7 @@ package UE14_130225_Streams1;
 import java.util.Random;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.stream.IntStream;
+import java.util.stream.Stream;
 
 public class UE14_Streams1 {
     public static void main(String[] args) {

src/UE15_030325_Streams2/UE15_Streams2.java

@@ -37,7 +37,9 @@ public class UE15_Streams2 {
     }
 
     public static String createRandoString(String vorrat, int len) {
-        return IntStream.range(0, len).mapToObj(_ -> String.valueOf(vorrat.charAt(new Random().nextInt(vorrat.length())))).collect(Collectors.joining());
+        return IntStream.range(0, len).mapToObj(
+
+                _ -> String.valueOf(vorrat.charAt(new Random().nextInt(vorrat.length())))).collect(Collectors.joining());
     }
 
     public static int[] deleteEquals(int[] ia) {

src/UE16_110325_Streams3/UE16_Streams3.java

@@ -155,6 +155,7 @@ public class UE16_Streams3 {
         return tdfWinners.stream().collect(Collectors.groupingBy(Winner::getNationality, Collectors.toList()));
     }
 
+
     public static Map<String, Long> winsByNationalityCounting() {
         return tdfWinners.stream().collect(Collectors.groupingBy(Winner::getNationality, Collectors.counting()));
     }

src/UE19_220425_Threads/nothread/Konto.java

@@ -0,0 +1,23 @@
+package UE19_220425_Threads.nothread;
+
+public class Konto {
+    private int kontostand;
+
+    public Konto() {
+        this.kontostand = 0;
+    }
+
+    public int getKontostand() {
+        return kontostand;
+    }
+
+    public void setKontostand(int kontostand) {
+        this.kontostand = kontostand;
+    }
+
+    public void add(int betrag) {
+        int wert = getKontostand();
+        wert = wert + betrag;
+        setKontostand(wert);
+    }
+}

src/UE19_220425_Threads/nothread/Main.java

@@ -0,0 +1,23 @@
+package UE19_220425_Threads.nothread;
+
+public class Main {
+    public static void main(String[] args) {
+        Konto a = new Konto();
+        Konto b = new Konto();
+        Konto c = new Konto();
+        Ueberweiser ab = new Ueberweiser(a, b);
+        Ueberweiser bc = new Ueberweiser(b, c);
+        Ueberweiser ca = new Ueberweiser(c, a);
+
+//        long start = System.currentTimeMillis();
+        ab.run();
+        bc.run();
+        ca.run();
+//        System.out.println(System.currentTimeMillis() - start + "ms");
+
+        System.out.println("A: " + a.getKontostand());
+        System.out.println("B: " + b.getKontostand());
+        System.out.println("C: " + c.getKontostand());
+    }
+}
+// 81ms

src/UE19_220425_Threads/nothread/Ueberweiser.java

@@ -0,0 +1,20 @@
+package UE19_220425_Threads.nothread;
+
+public class Ueberweiser {
+    private static final int anzahl = 10_000_000;
+    private static final int betrag = 10;
+    private final Konto von;
+    private final Konto nach;
+
+    public Ueberweiser(Konto von, Konto nach) {
+        this.von = von;
+        this.nach = nach;
+    }
+
+    public void run() {
+        for (int i = 0; i < anzahl; i++) {
+            von.add(-betrag);
+            nach.add(betrag);
+        }
+    }
+}