Field Detail

• written

  protected int written

  The number of bytes written to the data output stream so far. If this counter overflows, it will be wrapped to Integer.MAX_VALUE.

Constructor Detail

• DataOutputStream

  public DataOutputStream​(OutputStream out)

  Creates a new data output stream to write data to the specified underlying output stream. The counter written is set to zero.

  Parameters:

  out - the underlying output stream, to be saved for later use.

  See Also:

  FilterOutputStream.out

Method Detail

• write

  public void write​(int b)
             throws IOException

  Writes the specified byte (the low eight bits of the argument b) to the underlying output stream. If no exception is thrown, the counter written is incremented by 1.

  Implements the write method of OutputStream.

  Specified by:

  write in interface DataOutput

  Overrides:

  write in class FilterOutputStream

  Parameters:

  b - the byte to be written.

  Throws:

  IOException - if an I/O error occurs.

  See Also:

  FilterOutputStream.out

• write

  public void write​(byte[] b,
                    int off,
                    int len)
             throws IOException

  Writes len bytes from the specified byte array starting at offset off to the underlying output stream. If no exception is thrown, the counter written is incremented by len.

  Specified by:

  write in interface DataOutput

  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.

  See Also:

  FilterOutputStream.out

• flush

  public void flush()
             throws IOException

  Flushes this data output stream. This forces any buffered output bytes to be written out to the stream.

  The flush method of DataOutputStream calls the flush method of its underlying output stream.

  Specified by:

  flush in interface Flushable

  Overrides:

  flush in class FilterOutputStream

  Throws:

  IOException - if an I/O error occurs.

  See Also:

  FilterOutputStream.out, OutputStream.flush()

• writeBoolean

  public final void writeBoolean​(boolean v)
                          throws IOException

  Writes a boolean to the underlying output stream as a 1-byte value. The value true is written out as the value (byte)1; the value false is written out as the value (byte)0. If no exception is thrown, the counter written is incremented by 1.

  Specified by:

  writeBoolean in interface DataOutput

  Parameters:

  v - a boolean value to be written.

  Throws:

  IOException - if an I/O error occurs.

  See Also:

  FilterOutputStream.out

• writeByte

  public final void writeByte​(int v)
                       throws IOException

  Writes out a byte to the underlying output stream as a 1-byte value. If no exception is thrown, the counter written is incremented by 1.

  Specified by:

  writeByte in interface DataOutput

  Parameters:

  v - a byte value to be written.

  Throws:

  IOException - if an I/O error occurs.

  See Also:

  FilterOutputStream.out

• writeShort

  public final void writeShort​(int v)
                        throws IOException

  Writes a short to the underlying output stream as two bytes, high byte first. If no exception is thrown, the counter written is incremented by 2.

  Specified by:

  writeShort in interface DataOutput

  Parameters:

  v - a short to be written.

  Throws:

  IOException - if an I/O error occurs.

  See Also:

  FilterOutputStream.out

• writeChar

  public final void writeChar​(int v)
                       throws IOException

  Writes a char to the underlying output stream as a 2-byte value, high byte first. If no exception is thrown, the counter written is incremented by 2.

  Specified by:

  writeChar in interface DataOutput

  Parameters:

  v - a char value to be written.

  Throws:

  IOException - if an I/O error occurs.

  See Also:

  FilterOutputStream.out

• writeInt

  public final void writeInt​(int v)
                      throws IOException

  Writes an int to the underlying output stream as four bytes, high byte first. If no exception is thrown, the counter written is incremented by 4.

  Specified by:

  writeInt in interface DataOutput

  Parameters:

  v - an int to be written.

  Throws:

  IOException - if an I/O error occurs.

  See Also:

  FilterOutputStream.out

• writeLong

  public final void writeLong​(long v)
                       throws IOException

  Writes a long to the underlying output stream as eight bytes, high byte first. In no exception is thrown, the counter written is incremented by 8.

  Specified by:

  writeLong in interface DataOutput

  Parameters:

  v - a long to be written.

  Throws:

  IOException - if an I/O error occurs.

  See Also:

  FilterOutputStream.out

• writeFloat

  public final void writeFloat​(float v)
                        throws IOException

  Converts the float argument to an int using the floatToIntBits method in class Float, and then writes that int value to the underlying output stream as a 4-byte quantity, high byte first. If no exception is thrown, the counter written is incremented by 4.

  Specified by:

  writeFloat in interface DataOutput

  Parameters:

  v - a float value to be written.

  Throws:

  IOException - if an I/O error occurs.

  See Also:

  FilterOutputStream.out, Float.floatToIntBits(float)

• writeDouble

  public final void writeDouble​(double v)
                         throws IOException

  Converts the double argument to a long using the doubleToLongBits method in class Double, and then writes that long value to the underlying output stream as an 8-byte quantity, high byte first. If no exception is thrown, the counter written is incremented by 8.

  Specified by:

  writeDouble in interface DataOutput

  Parameters:

  v - a double value to be written.

  Throws:

  IOException - if an I/O error occurs.

  See Also:

  FilterOutputStream.out, Double.doubleToLongBits(double)

• writeBytes

  public final void writeBytes​(String s)
                        throws IOException

  Writes out the string to the underlying output stream as a sequence of bytes. Each character in the string is written out, in sequence, by discarding its high eight bits. If no exception is thrown, the counter written is incremented by the length of s.

  Specified by:

  writeBytes in interface DataOutput

  Parameters:

  s - a string of bytes to be written.

  Throws:

  IOException - if an I/O error occurs.

  See Also:

  FilterOutputStream.out

• writeChars

  public final void writeChars​(String s)
                        throws IOException

  Writes a string to the underlying output stream as a sequence of characters. Each character is written to the data output stream as if by the writeChar method. If no exception is thrown, the counter written is incremented by twice the length of s.

  Specified by:

  writeChars in interface DataOutput

  Parameters:

  s - a String value to be written.

  Throws:

  IOException - if an I/O error occurs.

  See Also:

  writeChar(int), FilterOutputStream.out

• writeUTF

  public final void writeUTF​(String str)
                      throws IOException

  Writes a string to the underlying output stream using modified UTF-8 encoding in a machine-independent manner.

  First, two bytes are written to the output stream as if by the writeShort method giving the number of bytes to follow. This value is the number of bytes actually written out, not the length of the string. Following the length, each character of the string is output, in sequence, using the modified UTF-8 encoding for the character. If no exception is thrown, the counter written is incremented by the total number of bytes written to the output stream. This will be at least two plus the length of str, and at most two plus thrice the length of str.

  Specified by:

  writeUTF in interface DataOutput

  Parameters:

  str - a string to be written.

  Throws:

  IOException - if an I/O error occurs.

• size

  public final int size()

  Returns the current value of the counter written, the number of bytes written to this data output stream so far. If the counter overflows, it will be wrapped to Integer.MAX_VALUE.

  Returns:

  the value of the written field.

  See Also:

  written