java.lang.Object | ||
↳ | java.io.Writer | |
↳ | java.io.CharArrayWriter |
A specialized Writer
for class for writing content to an (internal)
char array. As bytes are written to this writer, the char array may be
expanded to hold more characters. When the writing is considered to be
finished, a copy of the char array can be requested from the class.
Fields | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
buf | The buffer for characters. | ||||||||||
count | The ending index of the buffer. |
[Expand]
Inherited Fields | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
From class
java.io.Writer
|
Public Constructors | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Constructs a new
CharArrayWriter which has a buffer allocated
with the default size of 32 characters. | |||||||||||
Constructs a new
CharArrayWriter which has a buffer allocated
with the size of initialSize characters. |
Public Methods | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Appends a
CharSequence to the CharArrayWriter . | |||||||||||
Append a subsequence of a
CharSequence to the CharArrayWriter . | |||||||||||
Appends a char
c to the CharArrayWriter . | |||||||||||
Closes this writer.
| |||||||||||
Flushes this writer.
| |||||||||||
Resets this writer.
| |||||||||||
Returns the size of this writer, that is the number of characters it
stores.
| |||||||||||
Returns the contents of the receiver as a char array.
| |||||||||||
Returns the contents of this
CharArrayWriter as a string. | |||||||||||
Writes
count characters starting at offset in c
to this writer. | |||||||||||
Writes
count characters starting at offset from
the string str to this CharArrayWriter. | |||||||||||
Writes the specified character
oneChar to this writer. | |||||||||||
Writes the contents of this
CharArrayWriter to another Writer . |
[Expand]
Inherited Methods | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
From class
java.io.Writer
| |||||||||||
From class
java.lang.Object
| |||||||||||
From interface
java.io.Closeable
| |||||||||||
From interface
java.io.Flushable
| |||||||||||
From interface
java.lang.Appendable
| |||||||||||
From interface
java.lang.AutoCloseable
|
Constructs a new CharArrayWriter
which has a buffer allocated
with the default size of 32 characters. This buffer is also used as the
lock
to synchronize access to this writer.
Constructs a new CharArrayWriter
which has a buffer allocated
with the size of initialSize
characters. The buffer is also used
as the lock
to synchronize access to this writer.
initialSize | the initial size of this CharArrayWriters buffer. |
---|
IllegalArgumentException | if initialSize < 0 .
|
---|
Appends a CharSequence
to the CharArrayWriter
. The method
works the same way as write(csq.toString())
. If csq
is
null
, then it will be substituted with the string "null"
.
csq | the CharSequence appended to the CharArrayWriter , may be null . |
---|
Append a subsequence of a CharSequence
to the CharArrayWriter
. The first and last characters of the subsequence are
specified by the parameters start
and end
. A call to
CharArrayWriter.append(csq)
works the same way as CharArrayWriter.write(csq.subSequence(start, end).toString)
. If csq
is null
, then it will be substituted with the string "null"
.
csq | the CharSequence appended to the CharArrayWriter , may be null . |
---|---|
start | the index of the first character in the CharSequence
appended to the CharArrayWriter . |
end | the index of the character after the last one in the CharSequence appended to the CharArrayWriter . |
IndexOutOfBoundsException | if start < 0 , end < 0 , start > end ,
or if end is greater than the length of csq .
|
---|
Appends a char c
to the CharArrayWriter
. The method works
the same way as write(c)
.
c | the character appended to the CharArrayWriter. |
---|
Closes this writer. The implementation in CharArrayWriter
does nothing.
Flushes this writer. The implementation in CharArrayWriter
does nothing.
Resets this writer. The current write position is reset to the beginning of the buffer. All written characters are lost and the size of this writer is set to 0.
Returns the size of this writer, that is the number of characters it stores. This number changes if this writer is reset or when more characters are written to it.
Returns the contents of the receiver as a char array. The array returned is a copy and any modifications made to this writer after calling this method are not reflected in the result.
Returns the contents of this CharArrayWriter
as a string. The
string returned is a copy and any modifications made to this writer after
calling this method are not reflected in the result.
Writes count
characters starting at offset
in c
to this writer.
buffer | the non-null array containing characters to write. |
---|---|
offset | the index of the first character in buf to write. |
len | maximum number of characters to write. |
IndexOutOfBoundsException | if offset < 0 or len < 0 , or if
offset + len is bigger than the size of c .
|
---|
Writes count
characters starting at offset
from
the string str
to this CharArrayWriter.
str | the non-null string containing the characters to write. |
---|---|
offset | the index of the first character in str to write. |
count | the number of characters from str to write. |
NullPointerException | if str is null . |
---|---|
StringIndexOutOfBoundsException | if offset < 0 or count < 0 , or if
offset + count is bigger than the length of
str .
|
Writes the specified character oneChar
to this writer.
This implementation writes the two low order bytes of the integer
oneChar
to the buffer.
oneChar | the character to write. |
---|
Writes the contents of this CharArrayWriter
to another Writer
. The output is all the characters that have been written to the
receiver since the last reset or since it was created.
out | the non-null Writer on which to write the contents. |
---|
NullPointerException | if out is null . |
---|---|
IOException | if an error occurs attempting to write out the contents. |