import java.util.ArrayList ;
import java.util.Random ;

/**
 * A class to provide practice using ArrayLists
 */
class NumberList
{
	// instance var's
	private ArrayList<Integer> aList ;		// a list of Integer objects

	/**
	 * Creates a NumberList object.
	 */	
	public NumberList()
	{
		aList = new ArrayList<Integer>() ;	// creates an empty list
	}
	
	/**
	 * Adds a number to the list.
	 * @param number the number to be added to the list
	 */
	public void add(int number)
	{
		aList.add(number) ;		// calls add method of ArrayList class
	}
	
	/**
	 * Prints the numbers stored in aList.
	 */
	public void printList()
	{
		System.out.println( "The numbers on the list: " ) ;
		
		// for each number on the list, from 1st to last...
		for (int i = 0 ; i < aList.size() ; i++)
		{
			int number = aList.get(i) ;				// get the number
			System.out.print(number + "  ") ;		// print it
		}
		System.out.println("\n") ;
	}
	
	/**
	 * Prints the numbers stored in aList, in reverse order.
	 */
	public void printReversed()
	{
		System.out.println( "The numbers on the list, in reverse order: " ) ;
		// write your code here
		
		
	}
	
	/**
	 * Prints every other number stored in aList, starting with the first one.
	 */
	public void printEveryOther()
	{
		System.out.println( "Starting with the first, every other number: " ) ;
		// write your code here
		
		
	}

	/**
	 * Prints all the even-numbered ints stored in aList.
	 */
	public void printEvens()
	{
		System.out.println( "The even numbers on the list: " ) ;
		// write your code here
		
		
	}

	/**
	 * Copies all ints that are 50 or greater from aList to bigList.
	 */
	public void splitList()
	{
		// write your code here
		
			
	}
}

public class NumberListTester
{
	public static void main (String [] args)
	{
		Random r = new Random() ;
		NumberList list = new NumberList() ;
		
		// populate the list with 10 random 2-digit ints (10 to 99)
		for (int i = 1 ; i <= 10 ; i++)
		{
			int next = r.nextInt(90) + 10 ;
			// call the "add" method of the NumberList class
			list.add( next ) ;				
		}

		// print the aList
		list.printList() ;
		
	}
}