Added in API level 1

Summary: Fields | Inherited Fields | Protected Ctors | Methods | Inherited Methods

FilterWriter

public abstract class FilterWriter
extends Writer

java.lang.Object
↳	java.io.Writer
	↳	java.io.FilterWriter

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.

Summary

Fields
`protected Writer`	`out` The underlying character-output stream.

Inherited fields

From class java.io.Writer


    protected
    
    
    Object

lock

The object used to synchronize operations on this stream.

Protected constructors
`FilterWriter(Writer out)` Create a new filtered writer.

Public methods
`void`	`close()` Closes the stream, flushing it first.
`void`	`flush()` Flushes the stream.
`void`	`write(int c)` Writes a single character.
`void`	`write(String str, int off, int len)` Writes a portion of a string.
`void`	`write(char[] cbuf, int off, int len)` Writes a portion of an array of characters.

Inherited methods

From class


        
          java.io.Writer

`Writer`	`append(char c)` Appends the specified character to this writer.
`Writer`	`append(CharSequence csq, int start, int end)` Appends a subsequence of the specified character sequence to this writer.
`Writer`	`append(CharSequence csq)` Appends the specified character sequence to this writer.
`abstract void`	`close()` Closes the stream, flushing it first.
`abstract void`	`flush()` Flushes the stream.
`static Writer`	`nullWriter()` Returns a new `Writer` which discards all characters.
`void`	`write(String str)` Writes a string.
`void`	`write(int c)` Writes a single character.
`void`	`write(String str, int off, int len)` Writes a portion of a string.
`abstract void`	`write(char[] cbuf, int off, int len)` Writes a portion of an array of characters.
`void`	`write(char[] cbuf)` Writes an array of characters.

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

From interface


        
          java.lang.Appendable

`abstract Appendable`	`append(char c)` Appends the specified character to this `Appendable`.
`abstract Appendable`	`append(CharSequence csq, int start, int end)` Appends a subsequence of the specified character sequence to this `Appendable`.
`abstract Appendable`	`append(CharSequence csq)` Appends the specified character sequence to this `Appendable`.

From interface


        
          java.io.Closeable


      close()

Closes this stream and releases any system resources associated with it.

From interface


        
          java.io.Flushable


      flush()

Flushes this stream by writing any buffered output to the underlying stream.

From interface


        
          java.lang.AutoCloseable


      close()

Closes this resource, relinquishing any underlying resources.

Fields

out

Added in API level 1

protected Writer out

The underlying character-output stream.

Protected constructors

FilterWriter

Added in API level 1

protected FilterWriter (Writer out)

Create a new filtered writer.

Parameters
`out`	`Writer`: a Writer object to provide the underlying stream.

Throws
`NullPointerException`	if `out` is `null`

Public methods

close

Added in API level 1

public void close ()

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.

Throws
`IOException`

flush

Added in API level 1

public void flush ()

Flushes the stream.

Throws
`IOException`	If an I/O error occurs

write

Added in API level 1

public void write (int c)

Writes a single character.

Parameters
`c`	`int`: int specifying a character to be written

Throws
`IOException`	If an I/O error occurs

write

Added in API level 1

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

Writes a portion of a string.

Parameters
`str`	`String`: String to be written
`off`	`int`: Offset from which to start reading characters
`len`	`int`: Number of characters to be written

Throws
`IndexOutOfBoundsException`	If the values of the `off` and `len` parameters cause the corresponding method of the underlying `Writer` to throw an `IndexOutOfBoundsException`
`IOException`	If an I/O error occurs

write

Added in API level 1

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

Writes a portion of an array of characters.

Parameters
`cbuf`	`char`: Buffer of characters to be written
`off`	`int`: Offset from which to start reading characters
`len`	`int`: Number of characters to be written

Throws
`IndexOutOfBoundsException`	If the values of the `off` and `len` parameters cause the corresponding method of the underlying `Writer` to throw an `IndexOutOfBoundsException`
`IOException`	If an I/O error occurs