Android - An Open Handset Alliance Project

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.

Summary

Fields

protected int written The number of bytes written out so far

Fields inherited from class java.io.FilterOutputStream

out

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()
		Answers 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.

	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.
	void	finalize()
		Called by the virtual machine when there are no longer any (non-weak) references to the receiver.
final	Class	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 `wait` ing on the receiver to be made ready to run.
final	void	notifyAll()
		Causes all threads which are `wait` ing 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(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.
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()
		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`).

Methods inherited from interface java.io.Flushable

flush

Methods inherited from interface java.io.Closeable

Methods inherited from interface java.io.DataOutput

write, write, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF

				void	write(int oneByte)
					Writes the specified `byte` to the OutputStream.
				void	write(byte[] buffer)
					Writes the entire contents of the byte array `buffer` 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.
				void	writeBoolean(boolean val)
					Writes a boolean to this output stream.
				void	writeByte(int val)
					Writes a 8-bit byte to this output stream.
				void	writeBytes(String str)
					Writes the low order 8-bit bytes from a String to this output stream.
				void	writeChar(int oneByte)
					Writes the specified 16-bit character to the OutputStream.
				void	writeChars(String str)
					Writes the specified 16-bit characters contained in str to the OutputStream.
				void	writeDouble(double val)
					Writes a 64-bit double to this output stream.
				void	writeFloat(float val)
					Writes a 32-bit float to this output stream.
				void	writeInt(int val)
					Writes a 32-bit int to this output stream.
				void	writeLong(long val)
					Writes a 64-bit long to this output stream.
				void	writeShort(int val)
					Writes the specified 16-bit short to the OutputStream.
				void	writeUTF(String str)
					Writes the specified String out in UTF format.

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()

Answers 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.

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.

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.

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.

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.

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.

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.

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.

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.

				void	close()
					Close this FilterOutputStream.
				void	flush()
					Flush this FilterOutputStream to ensure all pending data is sent out to the target OutputStream.
				void	write(byte[] buffer)
					Writes the entire contents of the byte array `buffer` to this FilterOutputStream.
				void	write(int oneByte)
					Writes the specified byte `oneByte` to this FilterOutputStream.
				void	write(byte[] buffer, int offset, int count)
					Writes `count` `bytes` from the byte array `buffer` starting at `offset` to this FilterOutputStream.

	void	close()
		Close this OutputStream.
	void	flush()
		Flush this OutputStream.
	void	write(byte[] buffer)
		Writes the entire contents of the byte array `buffer` to this OutputStream.
abstract	void	write(int oneByte)
		Writes the specified byte `oneByte` to this OutputStream.
	void	write(byte[] buffer, int offset, int count)
		Writes `count` `bytes` from the byte array `buffer` starting at `offset` to this OutputStream.

				void	flush()
					Flushes the object by writing out any buffered data to the underlying output.

				void	close()
					Close the object and release any system resources it holds.


e.g. "intent" or "activity"

Android - An Open Handset Alliance Project

Documentation

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java.io.DataOutputStream

See Also

Summary

Fields

Fields inherited from class java.io.FilterOutputStream

Public Constructors

Public Methods

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.Flushable

Methods inherited from interface java.io.Closeable

Methods inherited from interface java.io.DataOutput

Details

Fields

protected int written

Public Constructors

public DataOutputStream(OutputStream out)

Parameters

Public Methods

public void flush()

Throws

public final int size()

Returns

public void write(int oneByte)

Parameters

Throws

See Also

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

Parameters

Throws

See Also

public final void writeBoolean(boolean val)

Parameters

Throws

See Also

public final void writeByte(int val)

Parameters

Throws

See Also

public final void writeBytes(String str)

Parameters

Throws

See Also

public final void writeChar(int val)

Parameters

Throws

See Also

public final void writeChars(String str)

Parameters

Throws

See Also

public final void writeDouble(double val)

Parameters

Throws

See Also

public final void writeFloat(float val)

Parameters

Throws

See Also

public final void writeInt(int val)

Parameters

Throws

See Also

public final void writeLong(long val)

Parameters

Throws

See Also

public final void writeShort(int val)

Parameters

Throws

See Also

public final void writeUTF(String str)

Parameters

Throws

See Also