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java.lang.Objectjava.io.Writer
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.
OutputStreamWriter
,
Reader
Field Summary | |
protected Object |
lock
The object used to synchronize operations on this stream. |
Constructor Summary | |
protected |
Writer()
Create a new character-stream writer whose critical sections will synchronize on the writer itself. |
protected |
Writer(Object lock)
Create a new character-stream writer whose critical sections will synchronize on the given object. |
Method Summary | |
abstract void |
close()
Close the stream, flushing it first. |
abstract void |
flush()
Flush the stream. |
void |
write(char[] cbuf)
Write an array of characters. |
abstract void |
write(char[] cbuf,
int off,
int len)
Write a portion of an array of characters. |
void |
write(int c)
Write a single character. |
void |
write(String str)
Write a string. |
void |
write(String str,
int off,
int len)
Write a portion of a string. |
Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
protected Object lock
Constructor Detail |
protected Writer()
protected Writer(Object lock)
lock
- Object to synchronize on.Method Detail |
public void write(int c) throws IOException
Subclasses that intend to support efficient single-character output should override this method.
c
- int specifying a character to be written.
IOException
- If an I/O error occurspublic void write(char[] cbuf) throws IOException
cbuf
- Array of characters to be written
IOException
- If an I/O error occurspublic abstract void write(char[] cbuf, int off, int len) throws IOException
cbuf
- Array of charactersoff
- Offset from which to start writing characterslen
- Number of characters to write
IOException
- If an I/O error occurspublic void write(String str) throws IOException
str
- String to be written
IOException
- If an I/O error occurspublic void write(String str, int off, int len) throws IOException
str
- A Stringoff
- Offset from which to start writing characterslen
- Number of characters to write
IOException
- If an I/O error occurspublic abstract void flush() throws IOException
IOException
- If an I/O error occurspublic abstract void close() throws IOException
IOException
- If an I/O error occurs
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