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Showing content from https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/io/FilterWriter.html below:

FilterWriter (Java SE 21 & JDK 21)

All Implemented Interfaces:

Closeable, Flushable, Appendable, AutoCloseable

Abstract class for writing filtered character streams. The abstract class FilterWriter itself provides default methods that pass all requests to the contained stream. Subclasses of FilterWriter should override some of these methods and may also provide additional methods and fields.

Since:

1.1

• Field Summary

  Fields

  The underlying character-output stream.

• Constructor Summary

  Constructors

  protected

  Create a new filtered writer.

• Method Summary

  void

  Closes the stream, flushing it first.

  void

  void

  write(char[] cbuf, int off, int len)

  Writes a portion of an array of characters.

  void

  Writes a single character.

  void

  Writes a portion of a string.

  Methods declared in class java.lang.Objectclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

• Field Details
  • out

    The underlying character-output stream.

• Constructor Details
  • FilterWriter protected FilterWriter(Writer out)

    Create a new filtered writer.

    Parameters:

    out - a Writer object to provide the underlying stream.

    Throws:

    NullPointerException - if out is null

• Method Details
  • write

    Writes a single character.

    Overrides:

    write in class Writer

    Parameters:

    c - int specifying a character to be written

    Throws:

    IOException - If an I/O error occurs

  • write public void write(char[] cbuf, int off, int len)

    throws

    IOException

    Writes a portion of an array of characters.

    Specified by:

    write in class Writer

    Parameters:

    cbuf - Buffer of characters to be written

    off - Offset from which to start reading characters

    len - Number of characters to be written

    Throws:

    IndexOutOfBoundsException - If the values of the off and len parameters cause the corresponding method of the underlying Writer to throw an IndexOutOfBoundsException

    IOException - If an I/O error occurs

  • write

    Writes a portion of a string.

    Overrides:

    write in class Writer

    Parameters:

    str - String to be written

    off - Offset from which to start reading characters

    len - Number of characters to be written

    Throws:

    IndexOutOfBoundsException - If the values of the off and len parameters cause the corresponding method of the underlying Writer to throw an IndexOutOfBoundsException

    IOException - If an I/O error occurs

  • flush

    Flushes the stream.

    Specified by:

    flush in interface Flushable

    Specified by:

    flush in class Writer

    Throws:

    IOException - If an I/O error occurs

  • close Description copied from class: Writer

    Closes the stream, flushing it first. Once the stream has been closed, further write() or flush() invocations will cause an IOException to be thrown. Closing a previously closed stream has no effect.

    Specified by:

    close in interface AutoCloseable

    Specified by:

    close in interface Closeable

    Specified by:

    close in class Writer

    Throws:

    IOException - If an I/O error occurs

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