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## org.apache.commons.io.output
Class StringBuilderWriter

    java.lang.Object
      java.io.Writer
          org.apache.commons.io.output.StringBuilderWriter

All Implemented Interfaces:
  Closeable, Flushable, Serializable, Appendable

    public class StringBuilderWriter

extends Writer
implements Serializable

`Writer` implementation that outputs to a `StringBuilder`.

NOTE: This implementation, as an alternative to `java.io.StringWriter`, provides an un-synchronized (i.e. for use in a single thread) implementation for better performance. For safe usage with multiple `Thread`s then `java.io.StringWriter` should be used.

Since:
  Commons IO 2.0
Version:
  $Revision: 1003647 $ $Date: 2010-10-01 21:53:59 +0100 (Fri, 01 Oct 2010) $
See Also:
  Serialized Form

Field Summary

Fields inherited from class java.io.Writer
`lock`

Constructor Summary
`StringBuilderWriter()` Construct a new `StringBuilder` instance with default capacity.
`StringBuilderWriter(int capacity)` Construct a new `StringBuilder` instance with the specified capacity.
`StringBuilderWriter(StringBuilder builder)` Construct a new instance with the specified `StringBuilder`.

Method Summary
`Writer` | `append(char value)` Append a single character to this Writer.
`Writer` | `append(CharSequence value)` Append a character sequence to this Writer.
`Writer` | `append(CharSequence value, int start, int end)` Append a portion of a character sequence to the `StringBuilder`.
`void` | `close()` Closing this writer has no effect.
`void` | `flush()` Flushing this writer has no effect.
`StringBuilder` | `getBuilder()` Return the underlying builder.
`String` | `toString()` Returns `StringBuilder.toString()`.
`void` | `write(char[] value, int offset, int length)` Write a portion of a character array to the `StringBuilder`.
`void` | `write(String value)` Write a String to the `StringBuilder`.

Methods inherited from class java.io.Writer
`write, write, write`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### StringBuilderWriter

    public StringBuilderWriter()

  Construct a new `StringBuilder` instance with default capacity.

### StringBuilderWriter

    public StringBuilderWriter(int capacity)

  Construct a new `StringBuilder` instance with the specified capacity.

  Parameters:
    `capacity` - The initial capacity of the underlying `StringBuilder`

### StringBuilderWriter

    public StringBuilderWriter(StringBuilder builder)

  Construct a new instance with the specified `StringBuilder`.

  Parameters:
    `builder` - The String builder

Method Detail

### append

    public Writer append(char value)

  Append a single character to this Writer.

  Specified by:
    `append` in interface `Appendable`
  Overrides:
    `append` in class `Writer`
  Parameters:
    `value` - The character to append
  Returns:
    This writer instance

### append

    public Writer append(CharSequence value)

  Append a character sequence to this Writer.

  Specified by:
    `append` in interface `Appendable`
  Overrides:
    `append` in class `Writer`
  Parameters:
    `value` - The character to append
  Returns:
    This writer instance

### append

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

  Append a portion of a character sequence to the `StringBuilder`.

  Specified by:
    `append` in interface `Appendable`
  Overrides:
    `append` in class `Writer`
  Parameters:
    `value` - The character to append
    `start` - The index of the first character
    `end` - The index of the last character + 1
  Returns:
    This writer instance

### close

    public void close()

  Closing this writer has no effect.

  Specified by:
    `close` in interface `Closeable`
  Specified by:
    `close` in class `Writer`

### flush

    public void flush()

  Flushing this writer has no effect.

  Specified by:
    `flush` in interface `Flushable`
  Specified by:
    `flush` in class `Writer`

### write

    public void write(String value)

  Write a String to the `StringBuilder`.

  Overrides:
    `write` in class `Writer`
  Parameters:
    `value` - The value to write

### write

    public void write(char[] value,
                      int offset,
                      int length)

  Write a portion of a character array to the `StringBuilder`.

  Specified by:
    `write` in class `Writer`
  Parameters:
    `value` - The value to write
    `offset` - The index of the first character
    `length` - The number of characters to write

### getBuilder

    public StringBuilder getBuilder()

  Return the underlying builder.

  Returns:
    The underlying builder

### toString

    public String toString()

  Returns `StringBuilder.toString()`.

  Overrides:
    `toString` in class `Object`
  Returns:
    The contents of the String builder.

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