Modifying Collections During Iteration: Can We Add Elements While Looping?

Modifying a Collection During Iteration: Possibilities and Solutions

When working with collections, you may encounter situations where you need to dynamically add elements while iterating. However, the Java Tutorial cautions against modifying the underlying collection using methods other than Iterator.remove. So, is it even possible to achieve this?

To bypass the iteration limitations, consider an alternative approach:

Utilizing a Queue for Iterative Modification

Leverage a queue to store the elements you want to iterate over. When you encounter an element that triggers the need to add new items, enqueue them at the end of the queue.

By iterating over the queue and continuously dequeuing elements until it's empty, you effectively perform breadth-first search. This approach allows you to add elements during iteration without modifying the underlying collection directly, thus avoiding the pitfalls outlined in the Java Tutorial.

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