DinnerMenuIterator.java

package IteratorPattern.MenuJavaUtilsExample;

import java.util.Iterator;


public class DinnerMenuIterator implements Iterator<MenuItem> {
    MenuItem[] list;
    int position = 0;

    public DinnerMenuIterator(MenuItem[] list) {
        this.list = list;
    }


    @Override
    public MenuItem next() {
        MenuItem menuItem = list[position];
        position++;
        return menuItem;
    }

    @Override
    public boolean hasNext() {
        if (position >= list.length || list[position] == null) {
            return false;
        }
        return true;
    }

    @Override
    public void remove() {
        if (position <= 0) {
            throw new IllegalStateException("You can't remove an item until you've done at least one next()");
        }

        if(list[position-1] != null){
            for(int i = position-1; i < list.length-1; i++){
                list[i] = list[i+1];
            }
            list[list.length-1] = null;
        }
    }
}