@CheckReturnValue @NullMarked

Package com.google.common.io

Utility methods and classes for I/O; for example input streams, output streams, readers, writers, and files.

At the core of this package are the Source/Sink types: ByteSource, CharSource, ByteSink and CharSink. They are factories for I/O streams that provide many convenience methods that handle both opening and closing streams for you.

This package is a part of the open-source Guava library. For more information on Sources and Sinks as well as other features of this package, see I/O Explained on the Guava wiki.

Author:

Chris Nokleberg

Interface Summary

Interface	Description
ByteArrayDataInput	An extension of DataInput for reading from in-memory byte arrays; its methods offer identical functionality but do not throw IOException.
ByteArrayDataOutput	An extension of DataOutput for writing to in-memory byte arrays; its methods offer identical functionality but do not throw IOException.
ByteProcessor<T extends @Nullable Object>	A callback interface to process bytes from a stream.
LineProcessor<T extends @Nullable Object>	A callback to be used with the streaming readLines methods.

Class Summary

Class	Description
BaseEncoding	A binary encoding scheme for reversibly translating between byte sequences and printable ASCII strings.
ByteSink	A destination to which bytes can be written, such as a file.
ByteSource	A readable source of bytes, such as a file.
ByteStreams	Provides utility methods for working with byte arrays and I/O streams.
CharSink	A destination to which characters can be written, such as a text file.
CharSource	A readable source of characters, such as a text file.
CharStreams	Provides utility methods for working with character streams.
Closeables	Utility methods for working with Closeable objects.
Closer	A Closeable that collects Closeable resources and closes them all when it is closed.
CountingInputStream	An InputStream that counts the number of bytes read.
CountingOutputStream	An OutputStream that counts the number of bytes written.
FileBackedOutputStream	An OutputStream that starts buffering to a byte array, but switches to file buffering once the data reaches a configurable size.
Files	Provides utility methods for working with files.
Flushables	Utility methods for working with Flushable objects.
LineReader	A class for reading lines of text.
LittleEndianDataInputStream	An implementation of DataInput that uses little-endian byte ordering for reading short, int, float, double, and long values.
LittleEndianDataOutputStream	An implementation of DataOutput that uses little-endian byte ordering for writing char, short, int, float, double, and long values.
MoreFiles	Static utilities for use with Path instances, intended to complement Files.
PatternFilenameFilter	File name filter that only accepts files matching a regular expression.
Resources	Provides utility methods for working with resources in the classpath.

Enum Summary

Enum	Description
FileWriteMode	Modes for opening a file for writing.
RecursiveDeleteOption	Options for use with recursive delete methods (MoreFiles.deleteRecursively(java.nio.file.Path, com.google.common.io.RecursiveDeleteOption...) and MoreFiles.deleteDirectoryContents(java.nio.file.Path, com.google.common.io.RecursiveDeleteOption...)).

Exception Summary

Exception	Description
BaseEncoding.DecodingException	Exception indicating invalid base-encoded input encountered while decoding.
InsecureRecursiveDeleteException	Exception indicating that a recursive delete can't be performed because the file system does not have the support necessary to guarantee that it is not vulnerable to race conditions that would allow it to delete files and directories outside of the directory being deleted (i.e., SecureDirectoryStream is not supported).