Class PipedWriter

java.lang.Object
java.io.Writer
java.io.PipedWriter
All Implemented Interfaces:
Closeable, Flushable, Appendable, AutoCloseable
public class PipedWriter extends Writer
Piped character-output streams.
Since:
1.1

  • Field Summary

    Fields declared in class Writer

    lock
    Modifier and Type
    Field
    Description
    protected Object
    lock
    The object used to synchronize operations on this stream.

  • Constructor Summary

    Constructors
    Constructor
    Description
    PipedWriter()
    Creates a piped writer that is not yet connected to a piped reader.
    PipedWriter(PipedReader snk)
    Creates a piped writer connected to the specified piped reader.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    close()
    Closes this piped output stream and releases any system resources associated with this stream.
    void
    connect(PipedReader snk)
    Connects this piped writer to a receiver.
    void
    flush()
    Flushes this output stream and forces any buffered output characters to be written out.
    void
    write(char[] cbuf, int off, int len)
    Writes len characters from the specified character array starting at offset off to this piped output stream.
    void
    write(int c)
    Writes the specified char to the piped output stream.

    Methods declared in class Writer

    append, append, append, nullWriter, write, write, write
    Modifier and Type
    Method
    Description
    Writer
    append(char c)
    Appends the specified character to this writer.
    Writer
    append(CharSequence csq)
    Appends the specified character sequence to this writer.
    Writer
    append(CharSequence csq, int start, int end)
    Appends a subsequence of the specified character sequence to this writer.
    static Writer
    nullWriter()
    Returns a new Writer which discards all characters.
    void
    write(char[] cbuf)
    Writes an array of characters.
    void
    write(String str)
    Writes a string.
    void
    write(String str, int off, int len)
    Writes a portion of a string.

    Methods declared in class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
    Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
    boolean
    equals(Object o)
    Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    May cause performance issues, deadlocks and hangs.
    final Class<? extends Object>
    getClass()
    Answers the unique instance of java.lang.Class which represents the class of the receiver.
    int
    hashCode()
    Answers an integer hash code for the receiver.
    final void
    notify()
    Causes one thread which is waiting on the receiver to be made ready to run.
    final void
    notifyAll()
    Causes all threads which are waiting on the receiver to be made ready to run.
    String
    toString()
    Answers a string containing a concise, human-readable description of the receiver.
    final void
    wait()
    Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
    final void
    wait(long time)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
    final void
    wait(long time, int frac)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

  • Constructor Details

    • PipedWriter

      public PipedWriter(PipedReader snk) throws IOException
      Creates a piped writer connected to the specified piped reader. Data characters written to this stream will then be available as input from snk.
      Parameters:
      snk - The piped reader to connect to.
      Throws:
      IOException - if an I/O error occurs.

    • PipedWriter

      public PipedWriter()
      Creates a piped writer that is not yet connected to a piped reader. It must be connected to a piped reader, either by the receiver or the sender, before being used.
      See Also:

  • Method Details

    • connect

      public void connect(PipedReader snk) throws IOException
      Connects this piped writer to a receiver. If this object is already connected to some other piped reader, an IOException is thrown.

      If snk is an unconnected piped reader and src is an unconnected piped writer, they may be connected by either the call: 

          src.connect(snk)
      or the call: 
          snk.connect(src)
      The two calls have the same effect.
      Parameters:
      snk - the piped reader to connect to.
      Throws:
      IOException - if an I/O error occurs.

    • write

      public void write(int c) throws IOException
      Writes the specified char to the piped output stream. If a thread was reading data characters from the connected piped input stream, but the thread is no longer alive, then an IOException is thrown.

      Implements the write method of Writer.

      Overrides:
      write in class Writer
      Parameters:
      c - the char to be written.
      Throws:
      IOException - if the pipe is broken, unconnected, closed or an I/O error occurs.

    • write

      public void write(char[] cbuf, int off, int len) throws IOException
      Writes len characters from the specified character array starting at offset off to this piped output stream. This method blocks until all the characters are written to the output stream. If a thread was reading data characters from the connected piped input stream, but the thread is no longer alive, then an IOException is thrown.
      Specified by:
      write in class Writer
      Parameters:
      cbuf - the data.
      off - the start offset in the data.
      len - the number of characters to write.
      Throws:
      IndexOutOfBoundsException - If off is negative, or len is negative, or off + len is negative or greater than the length of the given array
      IOException - if the pipe is broken, unconnected, closed or an I/O error occurs.

    • flush

      public void flush() throws IOException
      Flushes this output stream and forces any buffered output characters to be written out. This will notify any readers that characters are waiting in the pipe.
      Specified by:
      flush in interface Flushable
      Specified by:
      flush in class Writer
      Throws:
      IOException - if the pipe is closed, or an I/O error occurs.

    • close

      public void close() throws IOException
      Closes this piped output stream and releases any system resources associated with this stream. This stream may no longer be used for writing characters.
      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.