java.io

Class FileInputStream

java.lang.Object

java.io.InputStream

java.io.FileInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class FileInputStream
extends InputStream

A FileInputStream obtains input bytes from a file in a file system. What files are available depends on the host environment.

FileInputStream is meant for reading streams of raw bytes such as image data. For reading streams of characters, consider using FileReader.

Since:

JDK1.0

See Also:

File, FileDescriptor, FileOutputStream, Files.newInputStream(java.nio.file.Path, java.nio.file.OpenOption...)

Constructor Summary

Constructors

Constructor and Description
FileInputStream(File file) Creates a FileInputStream by opening a connection to an actual file, the file named by the File object file in the file system.
FileInputStream(FileDescriptor fdObj) Creates a FileInputStream by using the file descriptor fdObj, which represents an existing connection to an actual file in the file system.
FileInputStream(String name) Creates a FileInputStream by opening a connection to an actual file, the file named by the path name name in the file system.

Method Summary

Methods

Modifier and Type	Method and Description
int	available() Returns an estimate of the number of remaining bytes that can be read (or skipped over) from this input stream without blocking by the next invocation of a method for this input stream.
void	close() Closes this file input stream and releases any system resources associated with the stream.
protected void	finalize() Ensures that the close method of this file input stream is called when there are no more references to it.
FileChannel	getChannel() Returns the unique FileChannel object associated with this file input stream.
FileDescriptor	getFD() Returns the FileDescriptor object that represents the connection to the actual file in the file system being used by this FileInputStream.
int	read() Reads a byte of data from this input stream.
int	read(byte[] b) Reads up to b.length bytes of data from this input stream into an array of bytes.
int	read(byte[] b, int off, int len) Reads up to len bytes of data from this input stream into an array of bytes.
long	skip(long n) Skips over and discards n bytes of data from the input stream.