Why Does Removing Elements from Arrays.asList() Throw an UnsupportedOperationException?

Understanding the UnsupportedOperationException for List Removal

Arrays.asList() Convenience: Pitfalls Revealed

Arrays.asList() offers a simplistic approach to creating a List, but it comes with a caveat – its elements are immutable. Attempting to perform operations like remove() triggers an UnsupportedOperationException.

Comprehending Arrays.asList() Limitations

Arrays.asList() generates a "fixed-size list," prohibiting any structural modifications, including element removal.

The Correct Way: Embracing LinkedList

To address this limitation, opt for a LinkedList, renowned for its swift remove() operation:

List<String> list = new LinkedList<String>(Arrays.asList(split));

Grasping Regex in String.split()

When employing String.split() to partition a string, bear in mind that the pipe character (|) holds significance as a regex metacharacter. To avoid confusion, enclose it within backslashes (|) for a literal match:

template.split("\|")

Implementing an Efficient Algorithm

To overcome the inefficiency of step-by-step element removal, leverage a more efficient approach:

1. Generate a set of distinct random numbers within the desired range.
2. Utilize a ListIterator() to traverse the List, removing elements at the predefined indices.

This refined approach boasts an O(N) complexity, assuring optimal performance.

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