Highsocre manager für benutztung von Highscores eingefügt

src/main/java/de/deversmann/domain/HighscoreManager.java

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+package de.deversmann.domain;
+
+import java.io.*;
+import java.util.*;
+
+public class HighscoreManager {
+    private final Map<String, List<HighscoreEntry>> highscoreMap;
+
+    public HighscoreManager() {
+        highscoreMap = new HashMap<>();
+    }
+
+    public void addHighscore(String spielfeld, String name, long zeit, int fehler) {
+        HighscoreEntry entry = new HighscoreEntry(name, zeit, fehler);
+        highscoreMap.computeIfAbsent(spielfeld, k -> new ArrayList<>()).add(entry);
+        saveHighscores();
+    }
+
+    public List<HighscoreEntry> getHighscores(String spielfeld) {
+        return highscoreMap.getOrDefault(spielfeld, new ArrayList<>());
+    }
+
+    public double getDurchschnittszeit(String spielfeld) {
+        List<HighscoreEntry> highscores = getHighscores(spielfeld);
+        return highscores.stream().mapToLong(HighscoreEntry::getZeit).average().orElse(0);
+    }
+
+    private void saveHighscores() {
+        try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("highscores.dat"))) {
+            oos.writeObject(highscoreMap);
+        } catch (IOException e) {
+            System.err.println("Fehler beim Speichern der Highscores: " + e.getMessage());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public void loadHighscores() {
+        try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream("highscores.dat"))) {
+            Map<String, List<HighscoreEntry>> loadedMap = (Map<String, List<HighscoreEntry>>) ois.readObject();
+            highscoreMap.clear();
+            highscoreMap.putAll(loadedMap);
+        } catch (IOException | ClassNotFoundException e) {
+            System.err.println("Fehler beim Laden der Highscores: " + e.getMessage());
+        }
+    }
+
+    public static class HighscoreEntry implements Serializable {
+        private final String name;
+        private final long zeit;
+        private final int fehler;
+
+        public HighscoreEntry(String name, long zeit, int fehler) {
+            this.name = name;
+            this.zeit = zeit;
+            this.fehler = fehler;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public long getZeit() {
+            return zeit;
+        }
+
+        public int getFehler() {
+            return fehler;
+        }
+
+        @Override
+        public String toString() {
+            return name + ": " + zeit + "ms, Fehler: " + fehler;
+        }
+    }
+}