Demo1.java

public class demo1 {
		 ListNode head;
		 	private int data;

				static class ListNode{

							private int data;
									private ListNode next;
										}
					   void ListNode(int data){
						   			this.data=data;
												ListNode next = null;
														}
					   		public ListNode reverse (ListNode head){
											if (head == null){
																return head;
																		}
													ListNode current;
															ListNode previous = null;
																	Listnode next = null;
																			while (current != null){
																							next= current.next;
																										current.next=previous;
																													previous = current;
																																current=next;
																																		}
																					return previous;
																						}
									void display(){
												ListNode current = head;
														while(current!=null){
																		System.out.print(current.data + "");
																					current=current.next;
																							}
																System.out.print("null");
																		}
										public static void main(String[] args){
													ListNode head = new ListNode(1);
															ListNode second = new ListNode(5);
																	ListNode third = new ListNode(1);
																			ListNode fourth = new ListNode(2);
																					ListNode fifth = new ListNode(3);
																							ListNode sixth = new ListNode(4);
																									ListNode seventh = new ListNode(5);
																											head.next = second;
																													second.next=third;
																															third.next=fourth;
																																	fourth.next=fifth;
																																			fifth.next=sixth;
																																					sixth.next=seventh;
																																							Reverse r = new Reverse();
																																									Reverse.display(head);
																																											ListNode reverseList = r.reverse(head);
																																													r.display(reverseList);
																																															
																																														}
											
}