How to find every piece of code in my project that addressing/accessing file system?

I need to find every place in the code (in Java project) where it somehow treats file system (e.g. creates file, reads file, gets the list of directory files etc.)

What is the most common pattern to do this type of search? How not to miss something?

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Also, I'm interested in existence of pattern for accessing file systems. Do I need to do such access over the one specific utility (provider, manager, controller...) class?

This question may seem too broad, apologies in advance.