Module java.base

Package java.io

Class Writer

java.lang.Object

java.io.Writer

All Implemented Interfaces:

Closeable, Flushable, Appendable, AutoCloseable

Direct Known Subclasses:

BufferedWriter, CharArrayWriter, FilterWriter, OutputStreamWriter, PipedWriter, PrintWriter, StringWriter

public abstract class Writer
extends Object
implements Appendable, Closeable, Flushable

Abstract class for writing to character streams. The only methods that a subclass must implement are write(char[], int, int), flush(), and close(). Most subclasses, however, will override some of the methods defined here in order to provide higher efficiency, additional functionality, or both.

Since:

1.1

See Also:

• BufferedWriter
• CharArrayWriter
• FilterWriter
• OutputStreamWriter
• FileWriter
• PipedWriter
• PrintWriter
• StringWriter
• Reader

Field Summary

Fields

Modifier and Type	Field	Description
protected Object	lock	The object used to synchronize operations on this stream.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Writer()	Creates a new character-stream writer whose critical sections will synchronize on the writer itself.
protected	Writer(Object lock)	Creates a new character-stream writer whose critical sections will synchronize on the given object.

Method Summary

Modifier and Type

Method

Description

Writer

append(char c)

Appends the specified character to this writer.