I need to define the ItemFsvoritesListMTF class which uses Java's ArrayList as underlying storage. I wrote my code which its output is different from the output it should be. Please see below. Which part of my code needs to be modified?

Here is my c..;@Override

protectedvoidmoveUp(Itemt){/*****Implementthismethod*****/

intindex=list.indexOf(t)-1;

if(t!=list.get(0))

list.addFirst(list.remove(list.indexOf(t)));

}

/**Returnsaniterablecollectionofthekmostfrequentlyaccessedelements.*/

@Override

publicIterablegetFavorites(intk)throwsIllegalArgumentException{/*****Implementthismethod*****/

if(k<0||k>size())

thrownewIllegalArgumentException("Invalidk");

ArrayList>temp=newArrayList<>;

for(Itemitem:list)

temp.addLast(iter.next().getValue());

returnresult;

}

protectedstaticvoidtest(ItemFavoritesListfav){

char[]sample="hello.thisisatestoffavoriteslistmtf".toCharArray();

for(charc:sample){

fav.access(c);

intk=Math.min(5,fav.size());

System.out.println("Entirelist:"+fav);

System.out.println("Top"+k+":"+fav.getFavorites(k));

System.out.println();

}

}

//testusage

publicstaticvoidmain(String[]args){

test(newItemFavoritesListMTF());

}

}

Here is output of my code which error occurs:

Exception in thread "main" java.lang.Error: Unresolved compilation problem:

The method addFirst(ItemFavoritesList.Item) is undefined for the type: ArrayList>

at ItemFavoritesListMTF.moveUp(ItemFavoritesListMTF.java:36)

at ItemFavoritesList.access(ItemFavoritesList.java:77)

at ItemFavoritesListMTF.test(ItemFavoritesListMTF.java:56)

at ItemFavoritesListMTF.main(ItemFavoritesListMTF.java:66)

Here is the output which it should be like:

Entire list: [(h:1)]

Top 1: [h]

Entire list: [(e:1), (h:1)]

Top 2: [e, h]

Entire list: [(l:1), (e:1), (h:1)]

Top 3: [l, e, h]

Entire list: [(l:2), (e:1), (h:1)]

Top 3: [l, e, h]

Entire list: [(o:1), (l:2), (e:1), (h:1)]

Top 4: [l, o, e, h]

Entire list: [(.:1), (o:1), (l:2), (e:1), (h:1)]

Top 5: [l, ., o, e, h]

Entire list: [( :1), (.:1), (o:1), (l:2), (e:1), (h:1)]

Top 5: [l,, ., o, e]

Entire list: [(t:1), ( :1), (.:1), (o:1), (l:2), (e:1), (h:1)]

Top 5: [l, t,, ., o]

Entire list: [(h:2), (t:1), ( :1), (.:1), (o:1), (l:2), (e:1)]

Top 5: [h, l, t,, .]

Entire list: [(i:1), (h:2), (t:1), ( :1), (.:1), (o:1), (l:2), (e:1)]

Top 5: [h, l, i, t,]

Entire list: [(s:1), (i:1), (h:2), (t:1), ( :1), (.:1), (o:1), (l:2), (e:1)]

Top 5: [h, l, s, i, t]

Entire list: [( :2), (s:1), (i:1), (h:2), (t:1), (.:1), (o:1), (l:2), (e:1)]

Top 5: [ , h, l, s, i]

Entire list: [(i:2), ( :2), (s:1), (h:2), (t:1), (.:1), (o:1), (l:2), (e:1)]

Top 5: [i,, h, l, s]

Entire list: [(s:2), (i:2), ( :2), (h:2), (t:1), (.:1), (o:1), (l:2), (e:1)]

Top 5: [s, i,, h, l]

Entire list: [( :3), (s:2), (i:2), (h:2), (t:1), (.:1), (o:1), (l:2), (e:1)]

Top 5: [ , s, i, h, l]

Entire list: [(a:1), ( :3), (s:2), (i:2), (h:2), (t:1), (.:1), (o:1), (l:2), (e:1)]

Top 5: [ , s, i, h, l]

Entire list: [( :4), (a:1), (s:2), (i:2), (h:2), (t:1), (.:1), (o:1), (l:2), (e:1)]

Top 5: [ , s, i, h, l]

Entire list: [(t:2), ( :4), (a:1), (s:2), (i:2), (h:2), (.:1), (o:1), (l:2), (e:1)]

Top 5: [ , t, s, i, h]

Entire list: [(e:2), (t:2), ( :4), (a:1), (s:2), (i:2), (h:2), (.:1), (o:1), (l:2)]

Top 5: [ , e, t, s, i]

Entire list: [(s:3), (e:2), (t:2), ( :4), (a:1), (i:2), (h:2), (.:1), (o:1), (l:2)]

Top 5: [ , s, e, t, i]

Entire list: [(t:3), (s:3), (e:2), ( :4), (a:1), (i:2), (h:2), (.:1), (o:1), (l:2)]

Top 5: [ , t, s, e, i]

Entire list: [( :5), (t:3), (s:3), (e:2), (a:1), (i:2), (h:2), (.:1), (o:1), (l:2)]

Top 5: [ , t, s, e, i]

Entire list: [(o:2), ( :5), (t:3), (s:3), (e:2), (a:1), (i:2), (h:2), (.:1), (l:2)]

Top 5: [ , t, s, o, e]

Entire list: [(f:1), (o:2), ( :5), (t:3), (s:3), (e:2), (a:1), (i:2), (h:2), (.:1), (l:2)]

Top 5: [ , t, s, o, e]

Entire list: [( :6), (f:1), (o:2), (t:3), (s:3), (e:2), (a:1), (i:2), (h:2), (.:1), (l:2)]

Top 5: [ , t, s, o, e]

Entire list: [(f:2), ( :6), (o:2), (t:3), (s:3), (e:2), (a:1), (i:2), (h:2), (.:1), (l:2)]

Top 5: [ , t, s, f, o]

Entire list: [(a:2), (f:2), ( :6), (o:2), (t:3), (s:3), (e:2), (i:2), (h:2), (.:1), (l:2)]

Top 5: [ , t, s, a, f]

Entire list: [(v:1), (a:2), (f:2), ( :6), (o:2), (t:3), (s:3), (e:2), (i:2), (h:2), (.:1), (l:2)]

Top 5: [ , t, s, a, f]

Entire list: [(o:3), (v:1), (a:2), (f:2), ( :6), (t:3), (s:3), (e:2), (i:2), (h:2), (.:1), (l:2)]

Top 5: [ , o, t, s, a]

Entire list: [(r:1), (o:3), (v:1), (a:2), (f:2), ( :6), (t:3), (s:3), (e:2), (i:2), (h:2), (.:1), (l:2)]

Top 5: [ , o, t, s, a]

Entire list: [(i:3), (r:1), (o:3), (v:1), (a:2), (f:2), ( :6), (t:3), (s:3), (e:2), (h:2), (.:1), (l:2)]

Top 5: [ , i, o, t, s]

Entire list: [(t:4), (i:3), (r:1), (o:3), (v:1), (a:2), (f:2), ( :6), (s:3), (e:2), (h:2), (.:1), (l:2)]

Top 5: [ , t, i, o, s]

Entire list: [(e:3), (t:4), (i:3), (r:1), (o:3), (v:1), (a:2), (f:2), ( :6), (s:3), (h:2), (.:1), (l:2)]

Top 5: [ , t, e, i, o]

Entire list: [(s:4), (e:3), (t:4), (i:3), (r:1), (o:3), (v:1), (a:2), (f:2), ( :6), (h:2), (.:1), (l:2)]

Top 5: [ , s, t, e, i]

Entire list: [( :7), (s:4), (e:3), (t:4), (i:3), (r:1), (o:3), (v:1), (a:2), (f:2), (h:2), (.:1), (l:2)]

Top 5: [ , s, t, e, i]

Entire list: [(l:3), ( :7), (s:4), (e:3), (t:4), (i:3), (r:1), (o:3), (v:1), (a:2), (f:2), (h:2), (.:1)]

Top 5: [ , s, t, l, e]

Entire list: [(i:4), (l:3), ( :7), (s:4), (e:3), (t:4), (r:1), (o:3), (v:1), (a:2), (f:2), (h:2), (.:1)]

Top 5: [ , i, s, t, l]

Entire list: [(s:5), (i:4), (l:3), ( :7), (e:3), (t:4), (r:1), (o:3), (v:1), (a:2), (f:2), (h:2), (.:1)]

Top 5: [ , s, i, t, l]

Entire list: [(t:5), (s:5), (i:4), (l:3), ( :7), (e:3), (r:1), (o:3), (v:1), (a:2), (f:2), (h:2), (.:1)]

Top 5: [ , t, s, i, l]

Entire list: [( :8), (t:5), (s:5), (i:4), (l:3), (e:3), (r:1), (o:3), (v:1), (a:2), (f:2), (h:2), (.:1)]

Top 5: [ , t, s, i, l]

Entire list: [(m:1), ( :8), (t:5), (s:5), (i:4), (l:3), (e:3), (r:1), (o:3), (v:1), (a:2), (f:2), (h:2), (.:1)]

Top 5: [ , t, s, i, l]

Entire list: [(t:6), (m:1), ( :8), (s:5), (i:4), (l:3), (e:3), (r:1), (o:3), (v:1), (a:2), (f:2), (h:2), (.:1)]

Top 5: [ , t, s, i, l]

Entire list: [(f:3), (t:6), (m:1), ( :8), (s:5), (i:4), (l:3), (e:3), (r:1), (o:3), (v:1), (a:2), (h:2), (.:1)]

Top 5: [ , t, s, i, f]