Myujth

For example, if list_2 = 5, 6, 7, 8 and list_1 = 9, 10, 11, 12, then:
Addtolist2(list_2, list_1) will change list_2 to 5, 6, 7, 8, 9 and change list_1 to 10, 11, 12. Note that you should not create new lists in this method.

public class ListNode 
 int data;
 ListNode next;


public class List 
 ListNode header;

This what I tried:

public static void Addtolist2(list_2, List_1) 
 ListNode p = l2.header.next;

 while(p != null) 
 p = p.next;
 

 p = l1.header.next;
 ListNode q = l1.header.next;

 if (l1.header.next.next != null) 
 q = l1.header.next.next;
 

Maybe try something like this (you might have to change a few things)

public static void Addtolist2(List list2, List list1) 
 // Find last node in list2
 ListNode lastEl = list2.header;
 while(lastEl != null) 
 lastEl = lastEl.next;
 

 // Take the first element of list1
 ListNode firstEl = list1.header;

 // Add new element to list2 in last
 ListNode newEl = new ListNode();
 newEl.data = firstEl.data;
 lastEl = newEl;

 // Remove first element of list1 (replace with second)
 list1.header = firstEl.next;

List<Integer> lst1 = new ArrayList<>(Arrays.asList(5, 6, 7, 8));
List<Integer> lst2 = new ArrayList<>(Arrays.asList(9, 10, 11, 12));
System.out.println("lst1 = " + lst1 + " lst2 = " + lst2);
Integer moved = lst2.get(0);
lst2.remove(0);
lst1.add(moved);
System.out.println("lst1 = " + lst1 + " lst2 = " + lst2);

public class MainClass

public static void main(String args)

 LinkedList<Integer> list1 = new LinkedList<Integer>();
 list1.add(5);
 list1.add(6);
 list1.add(7);
 list1.add(8);

 LinkedList<Integer> list2 = new LinkedList<Integer>();
 list2.add(9);
 list2.add(10);
 list2.add(11);
 list2.add(12);

 Integer element = list2.getFirst();
 list1.addLast(element);
 list2.removeFirst();

 System.out.println("First List:");
 System.out.print(list1);

 System.out.println();
 System.out.println("Second List: ");
 System.out.print(list2);