java.nio.file · java.base · since Java 1.7

Files

declaration

public final class Files

Every file operation as a static method: read/write whole files, copy/move with options, walk trees, create/delete, query metadata. The workhorse of java.nio.file.

Key methods

`static String readString(Path) / static Path writeString(Path, CharSequence)`	Whole-file text I/O (UTF-8 default).
`static List<String> readAllLines(Path) / Stream<String> lines(Path)`	Eager / lazy line access (close the stream!).
`static Path copy(Path, Path, CopyOption...) / move(...)`	REPLACE_EXISTING, ATOMIC_MOVE options.
`static Stream<Path> walk(Path) / list(Path)`	Recursive / single-level listing — resource-holding streams.
`static boolean exists(Path) / isRegularFile / isDirectory`	Probes.
`static Path createDirectories(Path)`	mkdir -p.
`static BufferedReader newBufferedReader(Path, Charset)`	Reader with explicit encoding.