Added in API level 1

CharArrayWriter

open class CharArrayWriter : Writer

kotlin.Any
↳	java.io.Writer
	↳	java.io.CharArrayWriter

This class implements a character buffer that can be used as an Writer. The buffer automatically grows when data is written to the stream. The data can be retrieved using toCharArray() and toString().

Note: Invoking close() on this class has no effect, and methods of this class can be called after the stream has closed without generating an IOException.

Summary

Public constructors
`CharArrayWriter()` Creates a new CharArrayWriter.
`CharArrayWriter(initialSize: Int)` Creates a new CharArrayWriter with the specified initial size.

Public methods
open CharArrayWriter	`append(c: Char)` Appends the specified character to this writer.
open CharArrayWriter	`append(csq: CharSequence?)` Appends the specified character sequence to this writer.
open CharArrayWriter	`append(csq: CharSequence?, start: Int, end: Int)` Appends a subsequence of the specified character sequence to this writer.
open Unit	`close()` Close the stream.
open Unit	`flush()` Flush the stream.
open Unit	`reset()` Resets the buffer so that you can use it again without throwing away the already allocated buffer.
open Int	`size()` Returns the current size of the buffer.
open CharArray!	`toCharArray()` Returns a copy of the input data.
open String	`toString()` Converts input data to a string.
open Unit	`write(c: CharArray!, off: Int, len: Int)` Writes characters to the buffer.
open Unit	`write(c: Int)` Writes a character to the buffer.
open Unit	`write(str: String!, off: Int, len: Int)` Write a portion of a string to the buffer.
open Unit	`writeTo(out: Writer!)` Writes the contents of the buffer to another character stream.

Inherited functions

From class Writer

Writer!

nullWriter()

Returns a new Writer which discards all characters. The returned stream is initially open. The stream is closed by calling the close() method. Subsequent calls to close() have no effect.

While the stream is open, the append(char), append(CharSequence), append(CharSequence, int, int), flush(), write(int), write(char[]), and write(char[], int, int) methods do nothing. After the stream has been closed, these methods all throw IOException.

The object used to synchronize operations on the returned Writer is not specified.

Unit

write(cbuf: CharArray!)

Writes an array of characters.

Unit

write(str: String!)

Writes a string.

Properties
CharArray!	`buf` The buffer where data is stored.
Int	`count` The number of chars in the buffer.

Inherited properties

From class Writer

Any!

lock

The object used to synchronize operations on this stream. For efficiency, a character-stream object may use an object other than itself to protect critical sections. A subclass should therefore use the object in this field rather than this or a synchronized method.

Public constructors

CharArrayWriter

Added in API level 1

CharArrayWriter()

Creates a new CharArrayWriter.

CharArrayWriter

Added in API level 1

CharArrayWriter(initialSize: Int)

Creates a new CharArrayWriter with the specified initial size.

Parameters
`initialSize`	Int: an int specifying the initial buffer size.

Exceptions
`java.lang.IllegalArgumentException`	if initialSize is negative

Public methods

append

Added in API level 1

open fun append(c: Char): CharArrayWriter

Appends the specified character to this writer.

An invocation of this method of the form out.append(c) behaves in exactly the same way as the invocation

out.write(c)

Parameters
`c`	Char: The 16-bit character to append

Return
`CharArrayWriter`	This writer

Exceptions
`java.io.IOException`	If an I/O error occurs

append

Added in API level 1

open fun append(csq: CharSequence?): CharArrayWriter

Appends the specified character sequence to this writer.

An invocation of this method of the form out.append(csq) behaves in exactly the same way as the invocation

out.write(csq.toString())

Depending on the specification of toString for the character sequence csq, the entire sequence may not be appended. For instance, invoking the toString method of a character buffer will return a subsequence whose content depends upon the buffer's position and limit.

Parameters
`csq`	CharSequence?: The character sequence to append. If `csq` is `null`, then the four characters `"null"` are appended to this writer.

Return
`CharArrayWriter`	This writer

Exceptions
`java.io.IOException`	If an I/O error occurs

append

Added in API level 1

open fun append(
    csq: CharSequence?, 
    start: Int, 
    end: Int
): CharArrayWriter

Appends a subsequence of the specified character sequence to this writer.

An invocation of this method of the form out.append(csq, start, end) when csq is not null, behaves in exactly the same way as the invocation

out.write(csq.subSequence(start, end).toString())

Parameters
`csq`	CharSequence?: The character sequence from which a subsequence will be appended. If `csq` is `null`, then characters will be appended as if `csq` contained the four characters `"null"`.
`start`	Int: The index of the first character in the subsequence
`end`	Int: The index of the character following the last character in the subsequence

Return
`CharArrayWriter`	This writer

Exceptions
`java.lang.IndexOutOfBoundsException`	If `start` or `end` are negative, `start` is greater than `end`, or `end` is greater than `csq.length()`
`java.io.IOException`	If an I/O error occurs

close

Added in API level 1

open fun close(): Unit

Close the stream. This method does not release the buffer, since its contents might still be required. Note: Invoking this method in this class will have no effect.

Exceptions
`java.lang.Exception`	if this resource cannot be closed
`java.io.IOException`	If an I/O error occurs

flush

Added in API level 1

open fun flush(): Unit

Flush the stream.

Exceptions
`java.io.IOException`	If an I/O error occurs

reset

Added in API level 1

open fun reset(): Unit

Resets the buffer so that you can use it again without throwing away the already allocated buffer.

size

Added in API level 1

open fun size(): Int

Returns the current size of the buffer.

Return
`Int`	an int representing the current size of the buffer.

toCharArray

Added in API level 1

open fun toCharArray(): CharArray!

Returns a copy of the input data.

Return
`CharArray!`	an array of chars copied from the input data.

toString

Added in API level 1

open fun toString(): String

Converts input data to a string.

Return
`String`	the string.

write

Added in API level 1

open fun write(
    c: CharArray!, 
    off: Int, 
    len: Int
): Unit

Writes characters to the buffer.

Parameters
`cbuf`	Array of characters
`off`	Int: the start offset in the data
`len`	Int: the number of chars that are written
`c`	CharArray!: the data to be written

Exceptions
`java.lang.IndexOutOfBoundsException`	If `off` is negative, or `len` is negative, or `off + len` is negative or greater than the length of the given array
`java.io.IOException`	If an I/O error occurs

write

Added in API level 1

open fun write(c: Int): Unit

Writes a character to the buffer.

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

Exceptions
`java.io.IOException`	If an I/O error occurs

write

Added in API level 1

open fun write(
    str: String!, 
    off: Int, 
    len: Int
): Unit

Write a portion of a string to the buffer.

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

Exceptions
`java.lang.IndexOutOfBoundsException`	If `off` is negative, or `len` is negative, or `off + len` is negative or greater than the length of the given string
`java.io.IOException`	If an I/O error occurs

writeTo

Added in API level 1

open fun writeTo(out: Writer!): Unit

Writes the contents of the buffer to another character stream.

Parameters
`out`	Writer!: the output stream to write to

Exceptions
`java.io.IOException`	If an I/O error occurs.

Properties

buf

Added in API level 1

protected var buf: CharArray!

The buffer where data is stored.

count

Added in API level 1

protected var count: Int

The number of chars in the buffer.