Java API Lambda Expression The Stream API Parallelism Concepts Microservices Reactive Programming Tools Maven Cheat Sheet Files.exists vs file.exists 🔴 java.nio.file.Files is part of the newer, more efficient NIO.2 API introduced in Java 7, which is designed for better performance and scalability. Files#exists(Path path, LinkOption… options) is optimized for different file systems, because it uses the 🟠FileSystemProvider#checkAccess(Path path, AccessMode… modes) under the hood, allowing different implementations to optimize the file existence check based on the underlying file system. This makes it more efficient compared to file#exists() , which relies on the older I/O mechanisms. Example // Before Java 11 Path someFile = Paths.get("/tmp/some-file.txt"); // After Java 11 someFile = Paths.of("/tmp/some-file.txt"); assertTrue(Files.exists(someFile)); Stay away from the legacy 🟢 java.io.File class. Better check Common I/O Tasks in Modern Java