import java.util.*;

public class UseArrayList {


	public static void main(String[] args) {

	  ArrayList<Integer> list = new ArrayList<Integer>();

	  //ArrayList<Integer> list = new ArrayList<>();

	  for(int i=1; i<=10; i++)
		list.add(i);

	  System.out.println(list);
	  
	}

	private static void doubleList(ArrayList<Integer> list)
	{
		for(int i=0; i<list.size(); i++) {
			int oldValue = list.get(i);
			list.set(i, oldValue*2);

		}

	}

}


/*

primitive           wrapper class

int 		    Integer
double		    Double
boolean		    Boolean
char		    Character
long		    Long
short		    Short


autoboxing -- when Java takes a primitive type
	    and automatically converts it to a wrapper class
	    type.

autounboxing -- when Java takes a wrapper class type and 
		converts it to a primitive type. 

*/