Assign me this issue:

[https://leetcode.com/problems/binary-tree-level-order-traversal/]

Start with the linked LeetCode binary-tree level-order traversal problem and inspect the repository to find where Java solutions are expected. Confirm the required submission format and any available tests before implementing the solution; done means the traversal works for the problem's examples and edge cases.

Written by the indexing model from the issue text.