程序包 java.io

类 FilterWriter

java.lang.Object

java.io.Writer

java.io.FilterWriter

所有已实现的接口:

Closeable, Flushable, Appendable, AutoCloseable

public abstract class FilterWriter
extends Writer

Abstract class for writing filtered character streams. The abstract class FilterWriter itself provides default methods that pass all requests to the contained stream. Subclasses of FilterWriter should override some of these methods and may also provide additional methods and fields.

从以下版本开始:

JDK1.1

字段概要

字段

限定符和类型	字段	说明
protected Writer	out	The underlying character-output stream.

从类继承的字段 java.io.Writer

lock

构造器概要

构造器

限定符	构造器	说明
protected	FilterWriter(Writer out)	Create a new filtered writer.

方法概要

限定符和类型	方法	说明
void	close()	Closes the stream, flushing it first.
void	flush()	Flushes the stream.
void	write(char[] cbuf, int off, int len)	Writes a portion of an array of characters.
void	write(int c)	Writes a single character.
void	write(String str, int off, int len)	Writes a portion of a string.

从类继承的方法 java.lang.Object

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

从类继承的方法 java.io.Writer

append, append, append, write, write

字段详细资料

out

protected Writer out

The underlying character-output stream.

构造器详细资料

FilterWriter

protected FilterWriter(Writer out)

Create a new filtered writer.

参数:

out - a Writer object to provide the underlying stream.

抛出:

NullPointerException - if out is null

方法详细资料

write

public void write(int c)
           throws IOException

Writes a single character.

覆盖:

write 在类中 Writer

参数:

c - int specifying a character to be written

抛出:

IOException - If an I/O error occurs

write

public void write(char[] cbuf,
                  int off,
                  int len)
           throws IOException

Writes a portion of an array of characters.

指定者:

write 在类中 Writer

参数:

cbuf - Buffer of characters to be written

off - Offset from which to start reading characters

len - Number of characters to be written

抛出:

IOException - If an I/O error occurs

write

public void write(String str,
                  int off,
                  int len)
           throws IOException

Writes a portion of a string.

覆盖:

write 在类中 Writer

参数:

str - String to be written

off - Offset from which to start reading characters

len - Number of characters to be written

抛出:

IOException - If an I/O error occurs

flush

public void flush()
           throws IOException

Flushes the stream.

指定者:

flush 在接口中 Flushable

指定者:

flush 在类中 Writer

抛出:

IOException - If an I/O error occurs

close

public void close()
           throws IOException

从类复制的说明: Writer

Closes the stream, flushing it first. Once the stream has been closed, further write() or flush() invocations will cause an IOException to be thrown. Closing a previously closed stream has no effect.

指定者:

close 在接口中 AutoCloseable

指定者:

close 在接口中 Closeable

指定者:

close 在类中 Writer

抛出:

IOException - If an I/O error occurs