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 | |
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DataOutputStream(out: OutputStream!) Creates a new data output stream to write data to the specified underlying output stream. |
Public methods | |
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open Unit |
flush() Flushes this data output stream. |
Int |
size() Returns the current value of the counter |
open Unit |
Writes the specified byte (the low eight bits of the argument |
open Unit |
Writes |
Unit |
writeBoolean(v: Boolean) Writes a |
Unit |
Writes out a |
Unit |
writeBytes(s: String!) Writes out the string to the underlying output stream as a sequence of bytes. |
Unit |
Writes a |
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 |
Unit |
writeFloat(v: Float) Converts the float argument to an |
Unit |
Writes an |
Unit |
Writes a |
Unit |
writeShort(v: Int) Writes a |
Unit |
Writes a string to the underlying output stream using modified UTF-8 encoding in a machine-independent manner. |
Inherited functions | |
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Properties | |
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Int |
The number of bytes written to the data output stream so far. |
Inherited properties | |
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Public constructors
DataOutputStream
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 | |
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out |
OutputStream!: the underlying output stream, to be saved for later use. |
See Also
Public methods
flush
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. |
size
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
write
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
write
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
writeBoolean
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
writeByte
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 | |
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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
writeBytes
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 | |
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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
writeChar
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
writeChars
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. |
writeDouble
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. |
writeFloat
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. |
writeInt
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
writeLong
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
writeShort
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
writeUTF
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 | |
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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
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.