Added source files (Programmieren Tutorium)

presentations/Programmieren-Tutorium/Tutorium-09/SinglyLinkedList-Result/SinglyLinkedList.java

@@ -0,0 +1,90 @@
+public class SinglyLinkedList<E> {
+    private Node<E> head;
+
+    /**
+     * Add an object to the list.
+     *
+     * @param object the element you want to add
+     */
+    public void add(E object) {
+        Node<E> newNode = new Node<E>(object);
+        newNode.setNext(head);
+        head = newNode;
+    }
+
+    /**
+     * Check if object is in is in the SinglyLinkedList
+     *
+     * @param object the object you want to  search
+     * @return the bike, if you found it, otherwise {@code null}
+     */
+    public boolean contains(E object) {
+        Node<E> currentNode = head;
+
+        while (currentNode != null && currentNode.getElement().equals(object)) {
+            currentNode = currentNode.getNext();
+        }
+
+        return currentNode != null;
+    }
+
+    /**
+     * Get a bike.
+     *
+     * @param bike the bike you want to get
+     * @return
+     */
+    public E get(E bike) {
+        if (contains(bike)) {
+            Node<E> currentNode = head;
+            while (currentNode.getElement() != bike) {
+                currentNode = currentNode.getNext();
+            }
+            return bike;
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Remove bike from the SinglyLinkedList, if it exists.
+     *
+     * @param bike the bike you want to search
+     * @return {@code bike} if it is in SinglyLinkedList, otherwise {@code null}
+     */
+    public E remove(E bike) {
+        if (!contains(bike)) {
+            return null;
+        } else if (head.getElement() == bike) {
+            head = head.getNext();
+            return bike;
+        } else {
+            // Knoten und Vorgängerknoten finden
+            Node<E> previousNode = head;
+            Node<E> currentNode = head;
+
+            while (currentNode.getElement() != bike) {
+                previousNode = currentNode;
+                currentNode = currentNode.getNext();
+            }
+
+            // Zeiger umbiegen
+            previousNode.setNext(currentNode.getNext());
+            return bike;
+        }
+    }
+
+    /**
+     * Print all bikes in SinglyLinkedList.
+     */
+    public void printBikes() {
+        Node<E> currentNode = head;
+        System.out.print("start -> ");
+        while (currentNode != null) {
+            System.out.print(currentNode);
+            System.out.print(" -> ");
+            currentNode = currentNode.getNext();
+        }
+        System.out.println("null");
+    }
+}