Search elements of LinkedList Java example

/*
  Search elements of LinkedList Java example
  This java example shows how to search element of Java LinkedList using indexOf
  and lastIndexOf methods.
*/
 
import java.util.LinkedList;
 
public class SearchElementLinkedListExample {
 
  public static void main(String[] args) {
 
    //create LinkedList object
    LinkedList lList = new LinkedList();
 
    //add elements to LinkedList
    lList.add("1");
    lList.add("2");
    lList.add("3");
    lList.add("4");
    lList.add("5");
    lList.add("2");
 
    /*
     * To search first occurrence of an element of LinkedList, use
     * int indexOf(Object element) method.
     *
     * This method returns index of first occurrence of element if found in
     * the LinkedList. It returns -1 if element not found.
     */
 
     int index = lList.indexOf("2");
     if(index != -1)
     {
       System.out.println("First occurrence of 2 in LinkedList is at index : "
                                                                     + index);
     }
     else
     {
      System.out.println("LinkedList does not contain 2");
     }
 
    /*
     * To search last occurrence of an element of LinkedList, use
     * int lastIndexOf(Object element) method.
     *
     * This method returns index of last occurrence of element if found in
     * the LinkedList. It returns -1 if element not found.
     */
 
     index = lList.lastIndexOf("2");
     if(index != -1)
     {
      System.out.println("Last occurrence of 2 in LinkedList is at index : " 
                                                                     + index);
     }
     else
     {
      System.out.println("LinkedList does not contain 2");
     }
 
  }
}