Iterator - Behavioral Design Pattern - Hello, world! I'm Anvay

➿ Iterator

Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation.

interface IIterator {
    public boolean hasNext();
    public Object next();
}

interface IContainer {
    public IIterator createIterator();
}

class Collection implements IContainer {
    private String m_titles[] = {"0", "1", "2", "3", "4"};
    public IIterator createIterator() {
        ItemIterator result = new ItemIterator();
        return result;
    }
    private class ItemIterator implements IIterator {
        private int m_position = 0;
        public boolean hasNext() {
            return (m_position < m_titles.length)
        }
        public Object next() {
            if (this.hasNext()) {
                return m_titles[m_position++];
            }
            return null;
        }
    }
}