如何创建自定义foreach循环？

import java.util.Iterator;

public class CustomIterable implements Iterable<Integer> {
    private int[] collection;

    public CustomIterable(int[] collection) {
        this.collection = collection;
    }

    @Override
    public Iterator<Integer> iterator() {
        return new CustomIterator();
    }

    private class CustomIterator implements Iterator<Integer> {
        private int index;

        @Override
        public boolean hasNext() {
            return index < collection.length;
        }

        @Override
        public Integer next() {
            return collection[index++];
        }
    }
}

public class Main {
    public static void main(String[] args) {
        int[] numbers = {1, 2, 3, 4, 5};
        CustomIterable iterable = new CustomIterable(numbers);

        for (int number : iterable) {
            System.out.println(number);
        }
    }
}