java.io

Class Writer

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

This abstract class forms the base of the hierarchy of classes that write output as a stream of chars. It provides a common set of methods for writing chars to stream. Subclasses implement and/or extend these methods to write chars in a particular manner or to a particular destination such as a file on disk or network connection.

Field Summary
protected Object	lock This is the object used to synchronize criticial code sections for thread safety.

Constructor Summary
protected	Writer() This is the default no-argument constructor for this class.
protected	Writer(Object lock) This method initializes a `Writer` that will synchronize on the specified `Object`.

Method Summary
Writer	append(char c)
Writer	append(CharSequence cs)
Writer	append(CharSequence cs, int start, int end)
abstract void	close() This method closes the stream.
abstract void	flush() This method forces any data that may have been buffered to be written to the underlying output device.
void	write(int b) This method writes a single char to the output stream.
void	write(char[] buf) This method all the writes char from the passed array to the output stream.
abstract void	write(char[] buf, int offset, int len) This method writes `len` char from the specified array `buf` starting at index `offset` into the array.
void	write(String str) This method writes all the characters in a `String` to the output.
void	write(String str, int offset, int len) This method writes `len` chars from the `String` starting at position `offset`.

Field Detail

lock

protected Object lock

This is the object used to synchronize criticial code sections for thread safety. Subclasses should use this field instead of using synchronized methods or explicity synchronizations on this

Constructor Detail

Writer

protected Writer()

This is the default no-argument constructor for this class. This method will set up the class to synchronize criticial sections on itself.

Writer

protected Writer(Object lock)

This method initializes a Writer that will synchronize on the specified Object.

Parameters: lock The Object to use for synchronizing critical sections. Must not be null.

Method Detail

append

public Writer append(char c)

Since: 1.5

append

public Writer append(CharSequence cs)

Since: 1.5

append

public Writer append(CharSequence cs, int start, int end)

Since: 1.5

close

public abstract void close()

This method closes the stream. Any internal or native resources associated with this stream are freed. Any subsequent attempt to access the stream might throw an exception.

This method in this class does nothing.