Added in API level 1

DataOutputStream

open class DataOutputStream : FilterOutputStream, DataOutput

kotlin.Any
↳	java.io.OutputStream
	↳	java.io.FilterOutputStream
		↳	java.io.DataOutputStream

A data output stream lets an application write primitive Java data types to an output stream in a portable way. An application can then use a data input stream to read the data back in.

Summary

Public constructors
`DataOutputStream(out: OutputStream!)` Creates a new data output stream to write data to the specified underlying output stream.

Public methods
open Unit	`flush()` Flushes this data output stream.
Int	`size()` Returns the current value of the counter `written`, the number of bytes written to this data output stream so far.
open Unit	`write(b: ByteArray!, off: Int, len: Int)` Writes `len` bytes from the specified byte array starting at offset `off` to the underlying output stream.
open Unit	`write(b: Int)` Writes the specified byte (the low eight bits of the argument `b`) to the underlying output stream.
Unit	`writeBoolean(v: Boolean)` Writes a `boolean` to the underlying output stream as a 1-byte value.
Unit	`writeByte(v: Int)` Writes out a `byte` to the underlying output stream as a 1-byte value.
Unit	`writeBytes(s: String!)` Writes out the string to the underlying output stream as a sequence of bytes.
Unit	`writeChar(v: Int)` Writes a `char` to the underlying output stream as a 2-byte value, high byte first.
Unit	`writeChars(s: String!)` Writes a string to the underlying output stream as a sequence of characters.
Unit	`writeDouble(v: Double)` 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.
Unit	`writeFloat(v: Float)` 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.
Unit	`writeInt(v: Int)` Writes an `int` to the underlying output stream as four bytes, high byte first.
Unit	`writeLong(v: Long)` Writes a `long` to the underlying output stream as eight bytes, high byte first.
Unit	`writeShort(v: Int)` Writes a `short` to the underlying output stream as two bytes, high byte first.
Unit	`writeUTF(str: String!)` Writes a string to the underlying output stream using modified UTF-8 encoding in a machine-independent manner.

Inherited functions

From class FilterOutputStream

Unit

close()

Closes this output stream and releases any system resources associated with the stream.

When not already closed, the close method of FilterOutputStream calls its flush method, and then calls the close method of its underlying output stream.

Unit

write(b: ByteArray!)

Writes b.length bytes to this output stream.

The write method of FilterOutputStream calls its write method of three arguments with the arguments b, 0, and b.length.

Note that this method does not call the one-argument write method of its underlying output stream with the single argument b.

From class OutputStream

OutputStream!

nullOutputStream()

Returns a new OutputStream which discards all bytes. The returned stream is initially open. The stream is closed by calling the close() method. Subsequent calls to close() have no effect.

While the stream is open, the write(int), write(byte[]), and write(byte[], int, int) methods do nothing. After the stream has been closed, these methods all throw IOException.

The flush() method does nothing.

Properties
Int	`written` The number of bytes written to the data output stream so far.

Inherited properties

From class FilterOutputStream

OutputStream!

out

The underlying output stream to be filtered.

Public constructors

DataOutputStream

Added in API level 1

DataOutputStream(out: OutputStream!)

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

Parameters
`out`	OutputStream!: the underlying output stream, to be saved for later use.

See Also

java.io.FilterOutputStream#out

Public methods

flush

Added in API level 1

open fun flush(): Unit

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.

Exceptions
`java.io.IOException`	if an I/O error occurs.
`java.io.IOException`	if an I/O error occurs.

See Also

size

Added in API level 1

fun size(): Int

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.

Return
`Int`	the value of the `written` field.

See Also

java.io.DataOutputStream#written

write

Added in API level 1

open fun write(
    b: ByteArray!, 
    off: Int, 
    len: Int
): Unit

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.

Parameters
`b`	ByteArray!: the data.
`off`	Int: the start offset in the data.
`len`	Int: the number of bytes to write.

Exceptions
`java.io.IOException`	if an I/O error occurs.
`java.io.IOException`	if an I/O error occurs.

See Also

java.io.FilterOutputStream#out

write

Added in API level 1

open fun write(b: Int): Unit

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.

Parameters
`b`	Int: the `byte` to be written.

Exceptions
`java.io.IOException`	if an I/O error occurs.
`java.io.IOException`	if an I/O error occurs.

See Also

java.io.FilterOutputStream#out

writeBoolean

Added in API level 1

fun writeBoolean(v: Boolean): Unit

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.

Parameters
`v`	Boolean: a `boolean` value to be written.

Exceptions
`java.io.IOException`	if an I/O error occurs.
`java.io.IOException`	if an I/O error occurs.

See Also

java.io.FilterOutputStream#out

writeByte

Added in API level 1

fun writeByte(v: Int): Unit

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.

Parameters
`v`	Int: a `byte` value to be written.

Exceptions
`java.io.IOException`	if an I/O error occurs.
`java.io.IOException`	if an I/O error occurs.

See Also

java.io.FilterOutputStream#out

writeBytes

Added in API level 1

fun writeBytes(s: String!): Unit

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.

Parameters
`s`	String!: a string of bytes to be written.

Exceptions
`java.io.IOException`	if an I/O error occurs.
`java.io.IOException`	if an I/O error occurs.

See Also

java.io.FilterOutputStream#out

writeChar

Added in API level 1

fun writeChar(v: Int): Unit

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.

Parameters
`v`	Int: a `char` value to be written.

Exceptions
`java.io.IOException`	if an I/O error occurs.
`java.io.IOException`	if an I/O error occurs.

See Also

java.io.FilterOutputStream#out

writeChars

Added in API level 1

fun writeChars(s: String!): Unit

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.

Parameters
`s`	String!: a `String` value to be written.

Exceptions
`java.io.IOException`	if an I/O error occurs.
`java.io.IOException`	if an I/O error occurs.

See Also

writeDouble

Added in API level 1

fun writeDouble(v: Double): Unit

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.

Parameters
`v`	Double: a `double` value to be written.

Exceptions
`java.io.IOException`	if an I/O error occurs.
`java.io.IOException`	if an I/O error occurs.

See Also

writeFloat

Added in API level 1

fun writeFloat(v: Float): Unit

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.

Parameters
`v`	Float: a `float` value to be written.

Exceptions
`java.io.IOException`	if an I/O error occurs.
`java.io.IOException`	if an I/O error occurs.

See Also

writeInt

Added in API level 1

fun writeInt(v: Int): Unit

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.

Parameters
`v`	Int: an `int` to be written.

Exceptions
`java.io.IOException`	if an I/O error occurs.
`java.io.IOException`	if an I/O error occurs.

See Also

java.io.FilterOutputStream#out

writeLong

Added in API level 1

fun writeLong(v: Long): Unit

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.

Parameters
`v`	Long: a `long` to be written.

Exceptions
`java.io.IOException`	if an I/O error occurs.
`java.io.IOException`	if an I/O error occurs.

See Also

java.io.FilterOutputStream#out

writeShort

Added in API level 1

fun writeShort(v: Int): Unit

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.

Parameters
`v`	Int: a `short` to be written.

Exceptions
`java.io.IOException`	if an I/O error occurs.
`java.io.IOException`	if an I/O error occurs.

See Also

java.io.FilterOutputStream#out

writeUTF

Added in API level 1

fun writeUTF(str: String!): Unit

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.

Parameters
`s`	the string value to be written.
`str`	String!: a string to be written.

Exceptions
`java.io.IOException`	if an I/O error occurs.
`java.io.IOException`	if an I/O error occurs.

Properties

written

Added in API level 1

protected var written: Int

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