Iterator from LinkedList : Iterator « Collections « Java Tutorial

1. Java Tutorial
2. Collections
3. Iterator

import java.util.Iterator;
import java.util.LinkedList;

public class LinkedListExample {
  public static void main(String[] args) {
    // Create a new LinkedList
    LinkedList<Integer> list = new LinkedList<Integer>();

    // Add Items to the array list
    list.add(new Integer(1));
    list.add(new Integer(2));
    list.add(new Integer(3));
    list.add(new Integer(4));
    list.add(new Integer(5));
    list.add(new Integer(6));
    list.add(new Integer(7));
    list.add(new Integer(8));
    list.add(new Integer(9));
    list.add(new Integer(10));

    // Use iterator to display the values
    for (Iterator i = list.iterator(); i.hasNext();) {
      Integer integer = (Integer) i.next();
      System.out.println(integer);
    }

    // Remove the element at index 5 (value=6)
    list.remove(5);

    // Set the value at index 5, this overwrites the value 7
    list.set(5, new Integer(66));

    // Use the linked list as a queue:
    // add an object to the end of the list (queue)
    // remove an item from the head of the list (queue)
    list.addLast(new Integer(11));
    Integer head = (Integer) list.removeFirst();
    System.out.println("Head: " + head);

    // Use iterator to display the values
    for (Iterator i = list.iterator(); i.hasNext();) {
      Integer integer = (Integer) i.next();
      System.out.println(integer);
    }
  }
}