UE19

.idea/inspectionProfiles/Project_Default.xml

@@ -4,6 +4,11 @@
     <inspection_tool class="CommentedOutCode" enabled="true" level="WEAK WARNING" enabled_by_default="true">
       <option name="minLines" value="11" />
     </inspection_tool>
+    <inspection_tool class="DuplicatedCode" enabled="true" level="WEAK WARNING" enabled_by_default="true">
+      <Languages>
+        <language minSize="49" name="Java" />
+      </Languages>
+    </inspection_tool>
     <inspection_tool class="RegExpAnonymousGroup" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="RegExpEscapedMetaCharacter" enabled="false" level="INFORMATION" enabled_by_default="false" />
   </profile>

src/UE19_220425_Threads/thread/Konto.java

@@ -0,0 +1,23 @@
+package UE19_220425_Threads.thread;
+
+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/thread/Main.java

@@ -0,0 +1,30 @@
+package UE19_220425_Threads.thread;
+
+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.start();
+        bc.start();
+        ca.start();
+        try {
+            ab.join();
+            bc.join();
+            ca.join();
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+//        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());
+    }
+}
+// 501ms

src/UE19_220425_Threads/thread/Ueberweiser.java

@@ -0,0 +1,20 @@
+package UE19_220425_Threads.thread;
+
+public class Ueberweiser extends Thread {
+    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);
+        }
+    }
+}