Insert Element at End in Linked List Java Example

import java.io.*; 
 class node 
 { 
     public int v; 
     public node nxt; 
     public node (int x) 
         { 
             v=x; 
         } 
             public void dispval() 
                { 
                    System.out.println(v); 
                } 
 } 
 class LinkList 
 { 
     private node first,p,q; 
     public LinkList() 
      { 
         first=null; 
      } 
          public void insertval(int x) 
         { 
               node p=new node(x); 
               p.nxt=null; 
               if(first==null) 
                  {  
                    first=p; 
                    q=p; 
                  } 
                    else 
                    { 
                      q.nxt=p; 
                      q=p; 
                    } 
          } 
          public void insend(int x) 
          { 
               node p=new node(x); 
               p.nxt=null; 
               q=first; 
                while(q.nxt !=null) 
                     { 
                         q=q.nxt; 
                     } 
                        q.nxt=p; 
          } 
              public void displayList() 
              { 
                  node r= first; 
                 while(r !=null) 
                       { 
                          r.dispval(); 
                          r=r.nxt; 
                       } 
             } 
 } 
   class InsertElementEnd 
   { 
        public static void main(String args[]) throws IOException 
               { 
                    LinkList k = new LinkList(); 
                    BufferedReader b=new BufferedReader(new InputStreamReader(System.in)); 
                    String h; 
                    int n,i,m; 
                    System.out.println("how many numbers you want to insert in linked list"); 
                    h=b.readLine(); 
                    n=Integer.parseInt(h); 
                    System.out.println("Enter numricals in linked list "); 
                    for (i=1;i<=n;i++) 
                        { 
                           h=b.readLine(); 
                           m=Integer.parseInt(h); 
                            k.insertval(m); 
                        } 
                            System.out.println("Data in linked list is"); 
                            k.displayList(); 
                            System.out.println("Enter the value to add at the end of the link list"); 
                            h=b.readLine(); 
                            m=Integer.parseInt(h); 
                            k.insend(m); 
                            System.out.println("Data in linked list after adding the element at the end is"); 
                            k.displayList(); 
             } 
  }