Lab 7

import java.util.*;

class Main
{
    public static void main(String[] args) {
        ArrayList<String> list1 = new ArrayList<String>();
        list1.add("Hi");
        list1.add("How");
        list1.add("Are");
        list1.add("You");
        list1.add("Doing?");
        printl("List: "+list1);
        list1 = doubleList(list1);
        printl("Double List: "+list1);
        list1 = removeOddLength(list1);
        printl("Odds removed: "+list1);
        printl();
        
        ArrayList<Integer> intList0 = newIntList(1,4,8,9,11,15,17,28,41,59);
        ArrayList<Integer> intList1 = newIntList(4,7,11,17,19,20,23,28,37,59,81);
        printl("Int List: "+intList0);
        printl("Int List: "+intList1);
        printl("Intersection: "+intersect(intList0, intList1));
    }
    
    public static ArrayList<String> doubleList (ArrayList<String> original)
    {
        ArrayList<String> list = new ArrayList(original);
        for(int i = 0; i < list.size(); i+=2)
        {
            list.add(i,list.get(i));
        }
        return list;
    }
    
    public static ArrayList<String> removeOddLength (ArrayList<String> original)
    {
        ArrayList<String> list = new ArrayList(original);
        for(int i = list.size()-1; i >= 0; i--)
        {
            if (list.get(i).length() % 2 != 0)
                list.remove(i);
        }
        return list;
    }
    
    public static ArrayList<Integer> intersect (ArrayList<Integer> list0, ArrayList<Integer> list1)
    {
        ArrayList<Integer> n = new ArrayList<Integer>();
        for(int i : list0)
        {
            for (int j : list1)
            {
                if (i==j)
                    n.add(i);
            }
        }
        return n;
    }
    
    //just to make it easier to write out s.o.p(...)
    public static void print(Object ... args)
    {
        //String val = args[0].toString();
        for(int i = 0; i < args.length; i++)
            System.out.print(args[i].toString());
    }
    public static void printl(Object ... args)
    {
        //String val = args[0].toString();
        print(args);
        System.out.println();
    }
    
    public static ArrayList<Integer> newIntList (int ... args)
    {
        ArrayList<Integer> list = new ArrayList<Integer>();
        for(int i = 0; i < args.length; i++)
            list.add(args[i]);
        return list;
    }
}