如何在Java中实现过滤迭代器？

import java.util.Iterator;
import java.util.List;

public class FilterIterator<T> implements Iterator<T> {
    private List<T> list;
    private int currentIndex;
    private Filter<T> filter;

    public FilterIterator(List<T> list, Filter<T> filter) {
        this.list = list;
        this.filter = filter;
        this.currentIndex = 0;
    }

    @Override
    public boolean hasNext() {
        while (currentIndex < list.size()) {
            T item = list.get(currentIndex);
            if (filter.accept(item)) {
                return true;
            }
            currentIndex++;
        }
        return false;
    }

    @Override
    public T next() {
        T item = list.get(currentIndex);
        currentIndex++;
        return item;
    }

    @Override
    public void remove() {
        throw new UnsupportedOperationException("remove() method is not supported.");
    }
}

public interface Filter<T> {
    boolean accept(T item);
}

import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<Integer> numbers = new ArrayList<>();
        numbers.add(1);
        numbers.add(2);
        numbers.add(3);
        numbers.add(4);
        numbers.add(5);

        Filter<Integer> evenFilter = new Filter<Integer>() {
            @Override
            public boolean accept(Integer item) {
                return item % 2 == 0;
            }
        };

        Iterator<Integer> iterator = new FilterIterator<>(numbers, evenFilter);
        while (iterator.hasNext()) {
            System.out.println(iterator.next());
        }
    }
}