J2SE : LinkedList and Iterators in Java

/*
 * LinkedList.java
 *
 * Created on January 10, 2008, 8:51 PM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package linkedlist;

import java.util.List;
import java.util.LinkedList;
import java.util.Iterator;
import java.util.ListIterator;
import java.util.Collections;
import java.util.Random;

/**
 *
 * @author Sayed
 */
public class LinkedListTest {
    
    /** Creates a new instance of LinkedList */
    public LinkedListTest() {
    }
    
    /**
     *Example operations using linked lists
     */
    
    public void linkedListOperation(){
        
        final int MAX = 10;
        int counter = 0;

        //create two linked lists
        List listA = new LinkedList();
        List listB = new LinkedList();

        //store data in the linked list A
        for (int i = 0; i < MAX; i++) {
            System.out.println("  - Storing Integer(" + i + ")");
            listA.add(new Integer(i));
        }
       
        //print data from the linked list using iterator 
        Iterator it = listA.iterator();
        while (it.hasNext()) {
            System.out.println(it.next());
        }

        //print data from the linked list using listIterator. 
        counter = 0;
        ListIterator liIt = listA.listIterator();
        while (liIt.hasNext()) {
            System.out.println("Element [" + counter + "] = " + liIt.next());
            System.out.println("  - hasPrevious    = " + liIt.hasPrevious());
            System.out.println("  - hasNext        = " + liIt.hasNext());
            System.out.println("  - previousIndex  = " + liIt.previousIndex());
            System.out.println("  - nextIndex      = " + liIt.nextIndex());
            System.out.println();
            counter++;
        }


        //retrieve data from the linked list using index
        for (int j=0; j < listA.size(); j++) {
            System.out.println("[" + j + "] - " + listA.get(j));
        }

        //find the location of an element
        int locationIndex = listA.indexOf("5");
        System.out.println("Index location of the String \"5\" is: " + locationIndex);  

        //find the first and the last location of an element
        System.out.println("First occurance search for String \"5\".  Index =  " + 
        listA.indexOf("5"));
        System.out.println("Last Index search for String \"5\".       Index =  " + 
        listA.lastIndexOf("5"));

        //create a sublist from the list 
        List listSub = listA.subList(10, listA.size());
        System.out.println("New Sub-List from index 10 to " + listA.size() + ": " + 
        listSub);

        //sort the sub-list
        System.out.println("Original List   : " + listSub);
        Collections.sort(listSub);
        System.out.println("New Sorted List : " + listSub);
        System.out.println();

        //reverse the new sub-list
        System.out.println("Original List     : " + listSub);
        Collections.reverse(listSub);
        System.out.println("New Reversed List : " + listSub);
        System.out.println();

        //check to see if the lists are empty
        System.out.println("Is List A empty?   " + listA.isEmpty());
        System.out.println("Is List B empty?   " + listB.isEmpty());
        System.out.println("Is Sub-List empty? " + listSub.isEmpty());
        
        //compare two lists
        System.out.println("A=B? " + listA.equals(listB));        
        System.out.println();

        //Shuffle the elements around in some Random order for List A
        Collections.shuffle(listA, new Random());

        //convert a list into an array
        Object[] objArray = listA.toArray();
        for (int j=0; j < objArray.length; j++) {
            System.out.println("Array Element [" + j + "] = " + objArray[j]);
        }

        //clear listA
        System.out.println("List A   (before) : " + listA);        
        System.out.println();
        listA.clear();
        System.out.println("List A   (after)  : " + listA);        
        System.out.println();
        
    }
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        LinkedListTest listExample = new LinkedListTest();
        listExample.linkedListOperation();
    }
    
}