Class java.io.DataOutputStream 
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Class java.io.DataOutputStream 

java.lang.Object
|
   +----java.io.OutputStream
|
           +----java.io.FilterOutputStream
|
                   +----java.io.DataOutputStream
public class DataOutputStream
extends FilterOutputStream
implements DataOutput
This class lets you write primitive Java data types to a stream in a portable way. Primitive data types are well understood types with associated operations. For example, an Integer is considered to be a good primitive data type. The data can be converted back using a DataInputStream.

Variable Index

o written
The number of bytes written so far.

Constructor Index

o DataOutputStream(OutputStream)
Creates a new DataOutputStream.

Method Index

o flush()
Flushes the stream.
o size()
Returns the number of bytes written.
o write(byte[], int, int)
Writes a sub array of bytes.
o write(int)
Writes a byte.
o writeBoolean(boolean)
Writes a boolean.
o writeByte(int)
Writes an 8 bit byte.
o writeBytes(String)
Writes a String as a sequence of bytes.
o writeChar(int)
Writes a 16 bit char.
o writeChars(String)
Writes a String as a sequence of chars.
o writeDouble(double)
Writes a 64 bit double.
o writeFloat(float)
Writes a 32 bit float.
o writeInt(int)
Writes a 32 bit int.
o writeLong(long)
Writes a 64 bit long.
o writeShort(int)
Writes a 16 bit short.
o writeUTF(String)
Writes a String in UTF format.

Variables

o written 
protected int written
The number of bytes written so far.

Constructors

o DataOutputStream 
public DataOutputStream(OutputStream out)
Creates a new DataOutputStream.
Parameters:
out - the output stream

Methods

o write 
public synchronized void write(int b) throws IOException
Writes a byte. Will block until the byte is actually written.
Parameters:
b - the byte to be written
Throws: IOException
If an I/O error has occurred.
Overrides:
write in class FilterOutputStream
o write 
public synchronized void write(byte b[],
                                 int off,
                                 int len) throws IOException
Writes a sub array of bytes.
Parameters:
b - the data to be written
off - the start offset in the data
len - the number of bytes that are written
Throws: IOException
If an I/O error has occurred.
Overrides:
write in class FilterOutputStream
o flush 
public void flush() throws IOException
Flushes the stream. This will write any buffered output bytes.
Throws: IOException
If an I/O error has occurred.
Overrides:
flush in class FilterOutputStream
o writeBoolean 
public final void writeBoolean(boolean v) throws IOException
Writes a boolean.
Parameters:
v - the boolean to be written
o writeByte 
public final void writeByte(int v) throws IOException
Writes an 8 bit byte.
Parameters:
v - the byte value to be written
o writeShort 
public final void writeShort(int v) throws IOException
Writes a 16 bit short.
Parameters:
v - the short value to be written
o writeChar 
public final void writeChar(int v) throws IOException
Writes a 16 bit char.
Parameters:
v - the char value to be written
o writeInt 
public final void writeInt(int v) throws IOException
Writes a 32 bit int.
Parameters:
v - the integer value to be written
o writeLong 
public final void writeLong(long v) throws IOException
Writes a 64 bit long.
Parameters:
v - the long value to be written
o writeFloat 
public final void writeFloat(float v) throws IOException
Writes a 32 bit float.
Parameters:
v - the float value to be written
o writeDouble 
public final void writeDouble(double v) throws IOException
Writes a 64 bit double.
Parameters:
v - the double value to be written
o writeBytes 
public final void writeBytes(String s) throws IOException
Writes a String as a sequence of bytes.
Parameters:
s - the String of bytes to be written
o writeChars 
public final void writeChars(String s) throws IOException
Writes a String as a sequence of chars.
Parameters:
s - the String of chars to be written
o writeUTF 
public final void writeUTF(String str) throws IOException
Writes a String in UTF format.
Parameters:
str - the String in UTF format
o size 
public final int size()
Returns the number of bytes written.
Returns:
the number of bytes written thus far. 
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