init

01/Eins.java

@@ -0,0 +1,23 @@
+public class Eins {
+
+    public static void main(String[] args) {
+        System.out.println(calculateScore("imperative") == 9);
+        System.out.println(calculateScore("no") == 2);
+        System.out.println(wordScore("declarative") == 9);
+        System.out.println(wordScore("yes") == 3);
+    }
+
+    public static int calculateScore(String word) {
+        int score = 0;
+        for (char c : word.toCharArray()) {
+            if (c != 'a') {
+                score++;
+            }
+        }
+        return score;
+    }
+
+    public static int wordScore(String word) {
+        return word.replace("a", "").length();
+    }
+}

01/ShoppingCart.java

@@ -0,0 +1,10 @@
+import java.util.ArrayList;
+import java.util.List;
+
+public class ShoppingCart {
+
+    private List<String> items = new ArrayList<String>();
+    private boolean bookAdded;
+
+    public static void main(String[] args) {}
+}