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public  class  java.io.DataOutputStream
    extends  java.io.FilterOutputStream  (I-§2.12)
    implements java.io.DataOutput  (I-§2.25)
{
        // Fields
    protected int written;	§2.6.1

        // Constructors
    public DataOutputStream(OutputStream  out);	§2.6.2


        // Methods
    public void flush();	§2.6.3
    public final int size();	§2.6.4
    public void write(byte  b[], int  off, int  len);	§2.6.5
    public void write(int  b);	§2.6.6
    public final void writeBoolean(boolean  v);	§2.6.7
    public final void writeByte(int  v);	§2.6.8
    public final void writeBytes(String  s);	§2.6.9
    public final void writeChar(int  v);	§2.6.10
    public final void writeChars(String  s);	§2.6.11
    public final void writeDouble(double  v);	§2.6.12
    public final void writeFloat(float  v);	§2.6.13
    public final void writeInt(int  v);	§2.6.14
    public final void writeLong(long  v);	§2.6.15
    public final void writeShort(int  v);	§2.6.16
    public final void writeUTF(String  str);	§2.6.17
}

The number of bytes written to the data output stream.

Creates a new data output stream to write data to the specified underlying output stream (I-§2.12.1).

Parameters:

out - the underlying output stream

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

The flush method of DataOuputStream calls the flush method (I-§2.15.3) of its underlying output stream (I-§2.12.1).

Throws

IOException (I-§2.29)

If an I/O error occurs.

Overrides:

flush in class FilterOutputStream (I-§2.12.4).

Determines the number of bytes written to this data output stream.

Returns:

The value of the written field (I-§2.6.1).

Writes len bytes from the specified byte array starting at offset off to the underlying output stream (I-§2.12.1).

Parameters:

b - the data

off - the start offset in the data

len - the number of bytes to write

Throws

IOException (I-§2.29)

If an I/O error occurs.

Overrides:

write in class FilterOutputStream (I-§2.12.6).

Writes the specified byte to the underlying output stream (I-§2.12.1).

Parameters:

b - the byte to be written

Throws

IOException (I-§2.29)

If an I/O error occurs.

Overrides:

write in class FilterOutputStream (I-§2.12.7).

Writes a boolean to the underlying output stream (I-§2.12.1) as a one-byte value. The value true is written out as the value (byte)1; the value false is written out as the value (byte)0.

Parameters:

v - a boolean value to be written

Throws

IOException (I-§2.29)

If an I/O error occurs.

Writes out a byte to the underlying output stream (I-§2.12.1) as a one-byte value.

Parameters:

v - a byte value to be written

Throws

IOException (I-§2.29)

If an I/O error occurs.

Writes out the string to the underlying output stream (I-§2.12.1) as a sequence of bytes. Each character in the string is written out, in sequence, by discarding its high eight bits.

Parameters:

s - a string of bytes to be written

Throws

IOException (I-§2.29)

If an I/O error occurs.

Writes a char to the underlying output stream (I-§2.12.1) as a two-byte value, high byte first.

Parameters:

v - a char value to be written

Throws

IOException (I-§2.29)

If an I/O error occurs.

Writes a string to the underlying output stream (I-§2.12.1) as a sequence of characters. Each character is written to the data output stream as if by the writeChar method (I-§2.6.10).

Parameters:

s - a String value to be written

Throws

IOException (I-§2.29)

If an I/O error occurs.

Converts the double argument to a long using the doubleToLongBits method (I-§1.6.8) in class Double, and then writes that long value to the underlying output stream (I-§2.12.1) as an eight-byte quantity, high-byte first.

Parameters:

v - a double value to be written

Throws

IOException (I-§2.29)

If an I/O error occurs.

Converts the float argument to an int using the floatToIntBits method (I-§1.7.11) in class Float, and then writes that int value to the underlying output stream (I-§2.12.1) as a four-byte quantity, high-byte first

Parameters:

v - a float value to be written

Throws

IOException (I-§2.29)

If an I/O error occurs.

Writes an int to the underlying output stream (I-§2.12.1) as four bytes, high-byte first.

Parameters:

v - an int to be written

Throws

IOException (I-§2.29)

If an I/O error occurs.

Writes a long to the underlying output stream (I-§2.12.1) as eight bytes, high-byte first.

Parameters:

v - a long to be written

Throws

IOException (I-§2.29)

If an I/O error occurs.

Writes a short to the underlying output stream (I-§2.12.1) as two bytes, high-byte first.

Parameters:

v - a short to be written

Throws

IOException (I-§2.29)

If an I/O error occurs.

Writes out a string to the underlying output stream (I-§2.12.1) using UTF-8 encoding in a machine-independent manner.

First, two bytes are written to the output stream as if by the writeShort method (I-§2.6.16) 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 UTF-8 encoding (page I-225) for each character.

Parameters:

str - a string to be written

Throws

IOException (I-§2.29)

If an I/O error occurs.

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