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OOP/Java/Lab/Week12/GenList.java

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+public class SinglyLinkedListDemo {
+
+    public static void main(String[] args) {
+        // Test with Integer
+        SinglyLinkedList<Integer> intList = new SinglyLinkedList<>();
+        intList.add(10);
+        intList.add(20);
+        intList.add(30);
+
+        System.out.println("Integer List:");
+        intList.printList();
+
+        // Test with Double
+        SinglyLinkedList<Double> doubleList = new SinglyLinkedList<>();
+        doubleList.add(1.1);
+        doubleList.add(2.2);
+        doubleList.add(3.3);
+
+        System.out.println("\nDouble List:");
+        doubleList.printList();
+    }
+}
+
+class SinglyLinkedList<T> {
+
+    private class Node {
+
+        T data;
+        Node next;
+
+        Node(T data) {
+            this.data = data;
+            this.next = null;
+        }
+    }
+
+    private Node head;
+
+    public SinglyLinkedList() {
+        head = null;
+    }
+
+    public void add(T data) {
+        Node newNode = new Node(data);
+
+        if (head == null) {
+            head = newNode;
+            return;
+        }
+
+        Node current = head;
+        while (current.next != null) {
+            current = current.next;
+        }
+        current.next = newNode;
+    }
+
+    public void printList() {
+        Node current = head;
+        while (current != null) {
+            System.out.print(current.data + " -> ");
+            current = current.next;
+        }
+        System.out.println("null");
+    }
+}