How to create a linked list in java

1 import java.util.Scanner;
2 
3 class LLNode {
4     int nodeValue;
5     LLNode childNode;
6     
7     public LLNode(int nodeValue) {
8         this.nodeValue = nodeValue;
9         childNode = null;
10     }
11 }
12 
13 class LLCompute {
14     private static LLNode newNode;
15     private static LLNode headNode = null;
16     private static LLNode tempNode;
17     
18     public static void add(int nodeValue) {
19         newNode = new LLNode(nodeValue);
20         if(headNode != null) {
21             tempNode = headNode;
22             while(tempNode.childNode != null) {
23                 tempNode = tempNode.childNode;
24             }
25             tempNode.childNode = newNode;
26         }
27         else
28         {
29             headNode = newNode;
30         }
31     }
32     
33     public static void display() {
34         tempNode = headNode;
35         if(tempNode != null) {
36             while(tempNode.childNode != null) {
37                 System.out.print(tempNode.nodeValue+" ");
38                 tempNode = tempNode.childNode;
39             }
40             System.out.println(tempNode.nodeValue);
41         }
42     }
43 }
44 
45 public class LinkedList {
46     public static void main(String[] args) {
47         Scanner scan = new Scanner(System.in);
48         System.out.print("Enter the number of elements to insert:");
49         int numberOfElements = scan.nextInt();
50         int count = 1;
51         for(;count<=numberOfElements;count++) {
52             System.out.print("Enter the "+count+" element value:"); 
53             LLCompute.add(scan.nextInt());
54         }
55         LLCompute.display();
56     }
57 }