title: Want to add a element in desired index. But adding last
body: <p>I use add method to add an element to a desired index. But it is adding last. I want to add an element to a desired index. How can do it with this. Is is possible? without end pointer.</p>
  
  <pre><code>import java.util.*;
  
  class List {
  
      Customer listPtr;
      int index;
  
      public void add(Customer customer) {
          Customer temp = customer;
          if (listPtr == null) {
              listPtr = temp;
              index++;
           } else {
          Customer x = listPtr;
              while (x.next != null) {
                  x = x.next;
              }
              x.next = temp;
              index++;
          }
      }
  
      public void add(int index, Customer customer) {
          int size = size();
          while (size != -1) {
              size--;
              if (size == index) {
                  System.out.println(size + ":" + index);
                  add(customer);
              }
          }
      }
  
      public void removeFirst() {
          Customer temp = listPtr;
          if (listPtr != null) {
              listPtr = temp.next;
          }
      }
  
      public void removeLast() {
          Customer temp = listPtr;
          while (temp.next.next != null) {
              temp = temp.next;
          }
          temp.next = null;
          index--;
      }
  
      public void removeAll() {
          Customer temp = listPtr;
          while (temp != null) {
              listPtr = temp.next;
              temp = temp.next;
          }
      }
  
      public int size() {
          int size = 0;
          Customer temp = listPtr;
          while (temp != null) {
              size++;
              temp = temp.next;
          }
          return size;
      }
  
      public void printList() {
          Customer temp = listPtr;
          while (temp != null) {
              System.out.println(temp);
              temp = temp.next;
          }
      }
  }
  
  class DemoList {
  
      public static void main(String args[]) {
          List list = new List();
          Customer c1 = new Customer("10011", "Sam");
          Customer c2 = new Customer("10012", "Jason");
          Customer c3 = new Customer("10013", "Arnold");
          Customer c4 = new Customer("10014", "Bob");
          Customer c5 = new Customer("10015", "Tom");
          list.add(c1);
          list.add(c2);
          list.add(c3);
          list.add(c4);
          list.add(2, c5);
          System.out.println(list.size());
          list.printList();
      }
  }
  
  class Customer {
  
      String id;
      String name;
      Customer next;
  
      public Customer(String id, String name) {
          this.id = id;
          this.name = name;
      }
  
      public String toString() {
          return id + " : " + name;
      }
  
      public boolean equals(Object ob) {
          Customer c = (Customer) ob;
          return this.id.equals(c.id);
      }
  }
  </code></pre>