diff --git a/src/ListNode.java b/src/ListNode.java index dd6028c..4748bf9 100644 --- a/src/ListNode.java +++ b/src/ListNode.java @@ -1,3 +1,8 @@ public class ListNode { - + public int data; + public ListNode next; + + public ListNode(int data){ + this.data = data; + } } \ No newline at end of file diff --git a/src/Practice.java b/src/Practice.java index 34a2f8d..e6f1f41 100644 --- a/src/Practice.java +++ b/src/Practice.java @@ -1,5 +1,53 @@ public class Practice { public static void main(String[] args) { - + ListNode head = new ListNode(14); + ListNode mySeven = new ListNode(7); + + head.next = mySeven; + mySeven.next = new ListNode(28); + head.next.next.next = new ListNode(32); + head.next.next.next.next = new ListNode(23); + + // System.out.println(head.data); + // System.out.println(nextNumber.data); // or System.out.println(head.next.data); + + // int result = tailData(head); + // System.out.println(result); + + head = removeSecondNode(head); + ListNode current = head; + while (current != null){ + System.out.println(current.data); + current = current.next; + } + + // System.out.println("Looping:"); + // while (current != null){ + // //System.out.println(current.data); + // total += current.data; + // current = current.next; + // } + // System.out.println(total); + } + + public static int tailData(ListNode head){ + if (head == null){ + return -1; + } + // Current will point to what head is pointing + ListNode current = head; + + while (current.next != null){ + current = current.next; + } + return current.data; + } + + public static ListNode removeSecondNode(ListNode head){ + head.next = head.next.next; + return head; + } + + }