W3cubDocs

Class FileReader

java.lang.Object

java.io.Reader

java.io.InputStreamReader

java.io.FileReader

All Implemented Interfaces:: Closeable, AutoCloseable, Readable

public class FileReader extends InputStreamReader

Reads text from character files using a default buffer size. Decoding from bytes to characters uses either a specified charset or the default charset.

The FileReader is meant for reading streams of characters. For reading streams of raw bytes, consider using a FileInputStream.

Since:

1.1

See Also:

Field Summary

Fields declared in class java.io.Reader

lock

Constructor Summary

Constructor	Description
`FileReader(File file)`	Creates a new `FileReader`, given the `File` to read, using the default charset.
`FileReader(FileDescriptor fd)`	Creates a new `FileReader`, given the `FileDescriptor` to read, using the default charset.
`FileReader(File file, Charset charset)`	Creates a new `FileReader`, given the `File` to read and the charset.
`FileReader(String fileName)`	Creates a new `FileReader`, given the name of the file to read, using the default charset.
`FileReader(String fileName, Charset charset)`	Creates a new `FileReader`, given the name of the file to read and the charset.

Method Summary

Methods declared in class java.io.InputStreamReader

close, getEncoding, read, read, ready

Methods declared in class java.io.Reader

mark, markSupported, nullReader, read, read, reset, skip, transferTo

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FileReader

public FileReader(String fileName) throws FileNotFoundException

Creates a new FileReader, given the name of the file to read, using the default charset.

Parameters:

fileName - the name of the file to read

Throws:

FileNotFoundException - if the named file does not exist, is a directory rather than a regular file, or for some other reason cannot be opened for reading.

See Also:

FileReader

public FileReader(File file) throws FileNotFoundException

Creates a new FileReader, given the File to read, using the default charset.

Parameters:

file - the File to read

Throws:

FileNotFoundException - if the file does not exist, is a directory rather than a regular file, or for some other reason cannot be opened for reading.

See Also:

FileReader

public FileReader(FileDescriptor fd)

Creates a new FileReader, given the FileDescriptor to read, using the default charset.

Parameters:

fd - the FileDescriptor to read

See Also:

FileReader

public FileReader(String fileName, Charset charset) throws IOException

Creates a new FileReader, given the name of the file to read and the charset.

Parameters:: fileName - the name of the file to read; charset - the charset
Throws:: IOException - if the named file does not exist, is a directory rather than a regular file, or for some other reason cannot be opened for reading.
Since:: 11

FileReader

public FileReader(File file, Charset charset) throws IOException

Creates a new FileReader, given the File to read and the charset.

Parameters:: file - the File to read; charset - the charset
Throws:: IOException - if the file does not exist, is a directory rather than a regular file, or for some other reason cannot be opened for reading.
Since:: 11

© 1993, 2023, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/io/FileReader.html