Implement Linked List operations in LinkedListOperations

Java/LinkedListOperations.java

@@ -0,0 +1,75 @@
+/**
+ * Linked List Operations
+ * Common operations on singly linked lists
+ */
+public class LinkedListOperations {
+    static class Node {
+        int data;
+        Node next;
+        Node(int data) {
+            this.data = data;
+            this.next = null;
+        }
+    }
+
+    private Node head;
+
+    /**
+     * Insert at the beginning
+     */
+    public void insertAtBeginning(int data) {
+        Node newNode = new Node(data);
+        newNode.next = head;
+        head = newNode;
+    }
+
+    /**
+     * Insert at the end
+     */
+    public void insertAtEnd(int data) {
+        Node newNode = new Node(data);
+        if (head == null) {
+            head = newNode;
+            return;
+        }
+        Node temp = head;
+        while (temp.next != null) {
+            temp = temp.next;
+        }
+        temp.next = newNode;
+    }
+
+    /**
+     * Delete from beginning
+     */
+    public void deleteFromBeginning() {
+        if (head != null) {
+            head = head.next;
+        }
+    }
+
+    /**
+     * Display the list
+     */
+    public void display() {
+        Node temp = head;
+        while (temp != null) {
+            System.out.print(temp.data + " -> ");
+            temp = temp.next;
+        }
+        System.out.println("null");
+    }
+
+    /**
+     * Main method for testing
+     */
+    public static void main(String[] args) {
+        LinkedListOperations list = new LinkedListOperations();
+        list.insertAtEnd(10);
+        list.insertAtEnd(20);
+        list.insertAtBeginning(5);
+        list.display();
+        list.deleteFromBeginning();
+        list.display();
+    }
+}