LinkedList low level implementation [i]

Problem statement: LinkedList low level implementation in java !

1. class A1 {
2. A1 n;
3. int data;
4. }
5. 
   
6. public class LinkedListLowLevelExe1 {
7. A head;
8. 
   
9. public static void main(String[] args) {
10. 
    
11. A1 head = new A1();
12. head.data = 1;
13. head.n = null;
14. 
    
15. A1 h1 = new A1();
16. h1.data = 2;
17. h1.n = null;
18. 
    
19. head.n = h1;
20. 
    
21. A1 h2 = new A1();
22. h2.data = 3;
23. h2.n = null;
24. 
    
25. h1.n = h2;
26. 
    
27. A1 h3 = new A1();
28. h3.data = 4;
29. h3.n = null;
30. 
    
31. h2.n = h3;
32. 
    
33. A1 h4 = new A1();
34. h4.data = 5;
35. h4.n = null;
36. 
    
37. h3.n = h4;
38. System.out.println(head.data); // h.data;
39. System.out.println(head.n.data); // h=h.n; h.data;
40. System.out.println(head.n.n.data); // h=h.n.n;h.data;
41. System.out.println(head.n.n.n.data); // h=h.n.n.n;h.data;
42. System.out.println(head.n.n.n.n.data); // h=h.n.n.n.n;h.data;
43. }
44. }

Output:

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