finished CountWordsVisitor

src/uebung08/doc/Book.java

@@ -1,5 +1,6 @@
 package uebung08.doc;
 
+import java.util.ArrayList;
 import java.util.List;
 
 public class Book {
@@ -28,10 +29,22 @@ public class Book {
     }
 
     public String tableOfContents() {
-        return "";
+        List<String> res = new ArrayList<>();
+
+        for (TextComponent textComponent : content) {
+            res.addAll(textComponent.accept(new TableOfContentsVisitor()));
+        }
+
+        return res.toString();
     }
 
     public int countWordsByVisitor() {
-        return 0;
+        int count = 0;
+
+        for (TextComponent textComponent : content) {
+            count += textComponent.accept(new CountWordsVisitor());
+        }
+
+        return count;
     }
 }