Android
java.io
public class

java.io.DataOutputStream

java.lang.Object
java.io.OutputStream Closeable Flushable
java.io.FilterOutputStream
java.io.DataOutputStream DataOutput

DataOutputStream is a filter class which can write typed data to a Stream. Typically, this stream can be read in by a DataInputStream. Types that can be written include byte, 16-bit short, 32-bit int, 32-bit float, 64-bit long, 64-bit double, byte strings, and UTF Strings.

See Also

Summary

Fields

protected      int  written  The number of bytes written out so far  
Fields inherited from class java.io.FilterOutputStream

Public Constructors

            DataOutputStream(OutputStream out)
Constructs a new DataOutputStream on the OutputStream out.

Public Methods

          void  flush()
Flush this DataOutputStream to ensure all pending data is sent out to the target OutputStream.
    final      int  size()
Returns the total number of bytes written to this stream thus far.
          void  write(int oneByte)
Writes the specified byte to the OutputStream.
          void  write(byte[] buffer, int offset, int count)
Writes count bytes from the byte array buffer starting at offset index to the OutputStream.
    final      void  writeBoolean(boolean val)
Writes a boolean to this output stream.
    final      void  writeByte(int val)
Writes a 8-bit byte to this output stream.
    final      void  writeBytes(String str)
Writes the low order 8-bit bytes from a String to this output stream.
    final      void  writeChar(int val)
Writes the specified 16-bit character to the OutputStream.
    final      void  writeChars(String str)
Writes the specified 16-bit characters contained in str to the OutputStream.
    final      void  writeDouble(double val)
Writes a 64-bit double to this output stream.
    final      void  writeFloat(float val)
Writes a 32-bit float to this output stream.
    final      void  writeInt(int val)
Writes a 32-bit int to this output stream.
    final      void  writeLong(long val)
Writes a 64-bit long to this output stream.
    final      void  writeShort(int val)
Writes the specified 16-bit short to the OutputStream.
    final      void  writeUTF(String str)
Writes the specified String out in UTF format.
Methods inherited from class java.io.FilterOutputStream
Methods inherited from class java.io.OutputStream
Methods inherited from class java.lang.Object
Methods inherited from interface java.io.Closeable
Methods inherited from interface java.io.DataOutput
Methods inherited from interface java.io.Flushable

Details

Fields

protected int written

The number of bytes written out so far

Public Constructors

public DataOutputStream(OutputStream out)

Constructs a new DataOutputStream on the OutputStream out. All writes can now be filtered through this stream. Note that data written by this Stream is not in a human readable format but can be reconstructed by using a DataInputStream on the resulting output.

Parameters

out the target OutputStream to filter writes on.

Public Methods

public void flush()

Flush this DataOutputStream to ensure all pending data is sent out to the target OutputStream. This implementation flushes the target OutputStream.

Throws

IOException If an error occurs attempting to flush this DataOutputStream.

public final int size()

Returns the total number of bytes written to this stream thus far.

Returns

  • the number of bytes written to this DataOutputStream.

public void write(int oneByte)

Writes the specified byte to the OutputStream.

Parameters

oneByte the byte to be written

Throws

IOException If an error occurs attempting to write to this DataOutputStream.

See Also

public void write(byte[] buffer, int offset, int count)

Writes count bytes from the byte array buffer starting at offset index to the OutputStream.

Parameters

buffer the buffer to be written
offset offset in buffer to get bytes
count number of bytes in buffer to write

Throws

IOException If an error occurs attempting to write to this DataOutputStream.

public final void writeBoolean(boolean val)

Writes a boolean to this output stream.

Parameters

val the boolean value to write to the OutputStream

Throws

IOException If an error occurs attempting to write to this DataOutputStream.

See Also

public final void writeByte(int val)

Writes a 8-bit byte to this output stream.

Parameters

val the byte value to write to the OutputStream

Throws

IOException If an error occurs attempting to write to this DataOutputStream.

public final void writeBytes(String str)

Writes the low order 8-bit bytes from a String to this output stream.

Parameters

str the String containing the bytes to write to the OutputStream

Throws

IOException If an error occurs attempting to write to this DataOutputStream.

public final void writeChar(int val)

Writes the specified 16-bit character to the OutputStream. Only the lower 2 bytes are written with the higher of the 2 bytes written first. This represents the Unicode value of val.

Parameters

val the character to be written

Throws

IOException If an error occurs attempting to write to this DataOutputStream.

See Also

public final void writeChars(String str)

Writes the specified 16-bit characters contained in str to the OutputStream. Only the lower 2 bytes of each character are written with the higher of the 2 bytes written first. This represents the Unicode value of each character in str.

Parameters

str the String whose characters are to be written.

Throws

IOException If an error occurs attempting to write to this DataOutputStream.

See Also

public final void writeDouble(double val)

Writes a 64-bit double to this output stream. The resulting output is the 8 bytes resulting from calling Double.doubleToLongBits().

Parameters

val the double to be written.

Throws

IOException If an error occurs attempting to write to this DataOutputStream.

See Also

public final void writeFloat(float val)

Writes a 32-bit float to this output stream. The resulting output is the 4 bytes resulting from calling Float.floatToIntBits().

Parameters

val the float to be written.

Throws

IOException If an error occurs attempting to write to this DataOutputStream.

See Also

public final void writeInt(int val)

Writes a 32-bit int to this output stream. The resulting output is the 4 bytes, highest order first, of val.

Parameters

val the int to be written.

Throws

IOException If an error occurs attempting to write to this DataOutputStream.

See Also

public final void writeLong(long val)

Writes a 64-bit long to this output stream. The resulting output is the 8 bytes, highest order first, of val.

Parameters

val the long to be written.

Throws

IOException If an error occurs attempting to write to this DataOutputStream.

See Also

public final void writeShort(int val)

Writes the specified 16-bit short to the OutputStream. Only the lower 2 bytes are written with the higher of the 2 bytes written first.

Parameters

val the short to be written

Throws

IOException If an error occurs attempting to write to this DataOutputStream.

public final void writeUTF(String str)

Writes the specified String out in UTF format.

Parameters

str the String to be written in UTF format.

Throws

IOException If an error occurs attempting to write to this DataOutputStream.

See Also

Copyright 2007 Google Inc. Build 0.9_r1-98467 - 14 Aug 2008 18:56