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import java.util.LinkedList;

public class Main {
   public static void main(String[] args) {
      LinkedList lList = new LinkedList();
      lList.add("1");
      lList.add("2");
      lList.add("3");
      lList.add("4");
      lList.add("5");
      lList.add("2");
      System.out.println("First position of element 2: " + lList.indexOf("2"));
      System.out.println("Last position of element 2: " + lList.lastIndexOf("2"));
   }
}

First position of element 2: 1
Last position of element 2: 5