X is a general-purpose Java utility class that lets you handle everyday tasks with a single static facade—effectively replacing most of the scattered Apache-* commons helpers. Feel free to copy and tweak the source for your own needs.

1. Except for the require methods, no exceptions are thrown; default error handling is provided.
2. Covers the most commonly-used utility methods.
3. Names are kept short and consistent.
4. Returned arrays, Lists and Sets never contain null elements.
5. Thread-safe.
6. Memory-safe.