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Insert an Element into LinkedList Java example

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  1. /*
  2.   Insert an Element into LinkedList Java example
  3.   This java example shows how to insert an element to specified index using
  4.   add method of Java LinkedList class.
  5. */
  6.  
  7. import java.util.LinkedList;
  8.  
  9. public class LinkedListInsertElementExample {
  10.  
  11.   public static void main(String[] args) {
  12.  
  13.     //create LinkedList object
  14.     LinkedList lList = new LinkedList();
  15.    
  16.     //add elements to LinkedList
  17.     lList.add("1");
  18.     lList.add("2");
  19.     lList.add("3");
  20.     lList.add("4");
  21.     lList.add("5");
  22.    
  23.     System.out.println("LinkedList contains : " + lList);
  24.    
  25.     /*
  26.      * To insert an element into LinkedList object, use
  27.      * void add(int index , Object element) method.
  28.      *
  29.      * It inserts specified element at specified index in the LinkedList by
  30.      * shifting current elements and subsequent elements to the right.
  31.      */
  32.    
  33.      lList.add(2, "2.5");
  34.      System.out.println("After inserting 2.5, LinkedList contains : " + lList);
  35.    
  36.    
  37.   }
  38. }
  39.  
  40. /*
  41. Output would be
  42.  
  43. LinkedList contains : [1, 2, 3, 4, 5]
  44. After inserting 2.5, LinkedList contains : [1, 2, 2.5, 3, 4, 5]
  45. */