Class BufferedOutputStream

java.lang.Object
java.io.OutputStream
java.io.FilterOutputStream
java.io.BufferedOutputStream
All Implemented Interfaces:
Closeable,Flushable,AutoCloseable
public classBufferedOutputStreamextendsFilterOutputStream
The class implements a buffered output stream. By setting up such an output stream, an application can write bytes to the underlying output stream without necessarily causing a call to the underlying system for each byte written.
API Note:
Once wrapped in aBufferedOutputStream, the underlyingOutputStream should not be used directly nor wrapped with another stream.
Since:
1.0

  • Field Details

    • buf

      protected byte[] buf
      The internal buffer where data is stored.

    • count

      protected int count
      The number of valid bytes in the buffer. This value is always in the range0 throughbuf.length; elementsbuf[0] throughbuf[count-1] contain valid byte data.

  • Constructor Details

    • BufferedOutputStream

      public BufferedOutputStream(OutputStream out)
      Creates a new buffered output stream to write data to the specified underlying output stream.
      Parameters:
      out - the underlying output stream.

    • BufferedOutputStream

      public BufferedOutputStream(OutputStream out, int size)
      Creates a new buffered output stream to write data to the specified underlying output stream with the specified buffer size.
      Parameters:
      out - the underlying output stream.
      size - the buffer size.
      Throws:
      IllegalArgumentException - if size <= 0.

  • Method Details

    • write

      public void write(int b) throwsIOException
      Writes the specified byte to this buffered output stream.
      Overrides:
      write in class FilterOutputStream
      Parameters:
      b - the byte to be written.
      Throws:
      IOException - if an I/O error occurs.

    • write

      public void write(byte[] b, int off, int len) throwsIOException
      Writeslen bytes from the specified byte array starting at offsetoff to this buffered output stream.

      Ordinarily this method stores bytes from the given array into this stream's buffer, flushing the buffer to the underlying output stream as needed. If the requested length is at least as large as this stream's buffer, however, then this method will flush the buffer and write the bytes directly to the underlying output stream. Thus redundantBufferedOutputStreams will not copy data unnecessarily.

      Overrides:
      write in class FilterOutputStream
      Parameters:
      b - the data.
      off - the start offset in the data.
      len - the number of bytes to write.
      Throws:
      IOException - if an I/O error occurs.
      IndexOutOfBoundsException - Ifoff is negative,len is negative, orlen is greater thanb.length - off
      See Also:

    • flush

      public void flush() throwsIOException
      Flushes this buffered output stream. This forces any buffered output bytes to be written out to the underlying output stream.
      Specified by:
      flush in interface Flushable
      Overrides:
      flush in class FilterOutputStream
      Throws:
      IOException - if an I/O error occurs.
      See Also: