| java.lang.Object
 java.io.Writer
| Writer | | abstract public class Writer implements Appendable,Closeable,Flushable(Code) | | Writer is an Abstract class for writing Character Streams. Subclasses of
writer must implement the methods write(char[], int, int),
close() and flush().
See Also: Reader |
| Constructor Summary | |
| protected | Writer()
Constructs a new character stream Writer using this as the
Object to synchronize critical regions around. | | protected | Writer(Object lock)
Constructs a new character stream Writer using lock as the
Object to synchronize critical regions around. |
| Method Summary | |
| public Writer | append(char c)
Append a char cto the Writer. | | public Writer | append(CharSequence csq)
Append a CharSequence csq to the Writer. | | public Writer | append(CharSequence csq, int start, int end)
Append a subsequence of a CharSequence csq to the Writer.
The first char and the last char of the subsequnce is specified by the
parameter start and end. | | abstract public void | close()
Close this Writer. | | abstract public void | flush()
Flush this Writer. | | public void | write(char buf)
Writes the entire character buffer buf to this Writer. | | abstract public void | write(char buf, int offset, int count)
Writes count characters starting at offset in
buf to this Writer. | | public void | write(int oneChar)
Writes the specified character oneChar to this Writer. | | public void | write(String str)
Writes the characters from the String str to this Writer. | | public void | write(String str, int offset, int count)
Writes count number of characters starting at
offset from the String str to this Writer. |
| lock | | protected Object lock(Code) | | The object used to synchronize access to the writer.
|
| Writer | | protected Writer()(Code) | | Constructs a new character stream Writer using this as the
Object to synchronize critical regions around.
|
| Writer | | protected Writer(Object lock)(Code) | | Constructs a new character stream Writer using lock as the
Object to synchronize critical regions around.
Parameters:
lock - the Object to synchronize critical regions around. |
| append | | public Writer append(char c) throws IOException(Code) | | Append a char cto the Writer. The Writer.append(c)
works the same as Writer.write(c).
Parameters:
c - The character appended to the Writer. The Writer.
throws:
IOException - If any IOException raises during the procedure. |
| append | | public Writer append(CharSequence csq) throws IOException(Code) | | Append a CharSequence csq to the Writer. The
Writer.append(csq) works the same way as Writer.write(csq.toString()).
If csq is null, then "null" will be substituted for
csq.
Parameters:
csq - The CharSequence appended to the Writer. The Writer.
throws:
IOException - If any IOException raises during the procedure. |
| append | | public Writer append(CharSequence csq, int start, int end) throws IOException(Code) | | Append a subsequence of a CharSequence csq to the Writer.
The first char and the last char of the subsequnce is specified by the
parameter start and end. The
Writer.append(csq) works the same way as Writer.write (csqcsq.subSequence(start,end).toString).
If csq is null, then "null" will be substituted for
csq.
Parameters:
csq - The CharSequence appended to the Writaer.
Parameters:
start - The index of the first char in the CharSequence appended tothe Writer.
Parameters:
end - The index of the char after the last one in the CharSequenceappended to the Writer. The Writer.
throws:
IndexOutOfBoundsException - If start is less than end, end is greater than the length ofthe CharSequence, or start or end is negative.
throws:
IOException - If any IOException raises during the procedure. |
| close | | abstract public void close() throws IOException(Code) | | Close this Writer. This must be implemented by any concrete subclasses.
The implementation should free any resources associated with the Writer.
throws:
IOException - If an error occurs attempting to close this Writer. |
| flush | | abstract public void flush() throws IOException(Code) | | Flush this Writer. This must be implemented by any concrete subclasses.
The implementation should ensure all buffered characters are written out.
throws:
IOException - If an error occurs attempting to flush this Writer. |
| write | | public void write(char buf) throws IOException(Code) | | Writes the entire character buffer buf to this Writer.
Parameters:
buf - the non-null array containing characters to write.
throws:
IOException - If this Writer has already been closed or some otherIOException occurs. |
| write | | abstract public void write(char buf, int offset, int count) throws IOException(Code) | | Writes count characters starting at offset in
buf to this Writer. This abstract method must be implemented
by concrete subclasses.
Parameters:
buf - the non-null array containing characters to write.
Parameters:
offset - offset in buf to retrieve characters
Parameters:
count - maximum number of characters to write
throws:
IOException - If this Writer has already been closed or some other IOException occurs.
throws:
ArrayIndexOutOfBoundsException - If offset or count are outside of bounds. |
| write | | public void write(int oneChar) throws IOException(Code) | | Writes the specified character oneChar to this Writer.
This implementation writes the low order two bytes of
oneChar to the Stream.
Parameters:
oneChar - The character to write
throws:
IOException - If this Writer has already been closed or some otherIOException occurs. |
| write | | public void write(String str) throws IOException(Code) | | Writes the characters from the String str to this Writer.
Parameters:
str - the non-null String containing the characters to write.
throws:
IOException - If this Writer has already been closed or some otherIOException occurs. |
| write | | public void write(String str, int offset, int count) throws IOException(Code) | | Writes count number of characters starting at
offset from the String str to this Writer.
Parameters:
str - the non-null String containing the characters to write.
Parameters:
offset - the starting point to retrieve characters.
Parameters:
count - the number of characters to retrieve and write.
throws:
IOException - If this Writer has already been closed or some otherIOException occurs.
throws:
ArrayIndexOutOfBoundsException - If offset or count are outside of bounds. |
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