| java.lang.Object
 java.io.OutputStream
java.io.DataOutputStream
All known Subclasses: com.sun.cdc.io.GeneralBase,
| DataOutputStream | | public class DataOutputStream extends OutputStream implements DataOutput(Code) | | 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.
version:
12/17/01 (CLDC 1.1)
See Also: java.io.DataInputStream
since:
JDK1.0, CLDC 1.0 |
| Constructor Summary | |
| public | DataOutputStream(OutputStream out)
Creates a new data output stream to write data to the specified
underlying output stream. |
| Method Summary | |
| public void | close()
Closes this output stream and releases any system resources
associated with the stream. | | public void | flush()
Flushes this data output stream. | | public void | write(int b)
Writes the specified byte (the low eight bits of the argument
b) to the underlying output stream. | | public void | write(byte b, int off, int len)
Writes len bytes from the specified byte array
starting at offset off to the underlying output stream. | | final public void | writeBoolean(boolean v)
Writes a boolean to the underlying output stream as
a 1-byte value. | | final public void | writeByte(int v)
Writes out a byte to the underlying output stream as
a 1-byte value. | | final public void | writeChar(int v)
Writes a char to the underlying output stream as a
2-byte value, high byte first. | | final public void | writeChars(String s)
Writes a string to the underlying output stream as a sequence of
characters. | | final public void | writeDouble(double v)
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. | | final public void | writeFloat(float v)
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. | | final public void | writeInt(int v)
Writes an int to the underlying output stream as four
bytes, high byte first. | | final public void | writeLong(long v)
Writes a long to the underlying output stream as eight
bytes, high byte first. | | final public void | writeShort(int v)
Writes a short to the underlying output stream as two
bytes, high byte first. | | final public void | writeUTF(String str)
Writes a string to the underlying output stream using 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. | | final static int | writeUTF(String str, DataOutput out)
Writes a string to the specified DataOutput using UTF-8 encoding in a
machine-independent manner.
First, two bytes are written to out as if by the writeShort
method giving the number of bytes to follow. |
| DataOutputStream | | public DataOutputStream(OutputStream out)(Code) | | Creates a new data output stream to write data to the specified
underlying output stream.
Parameters:
out - the underlying output stream, to be saved for lateruse. |
| close | | public void close() throws IOException(Code) | | Closes this output stream and releases any system resources
associated with the stream.
The close method
calls its flush method, and then calls the
close method of its underlying output stream.
exception:
IOException - if an I/O error occurs. |
| flush | | public void flush() throws IOException(Code) | | 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.
exception:
IOException - if an I/O error occurs. |
| write | | public void write(int b) throws IOException(Code) | | Writes the specified byte (the low eight bits of the argument
b) to the underlying output stream.
Implements the write method of OutputStream.
Parameters:
b - the byte to be written.
exception:
IOException - if an I/O error occurs. |
| write | | public void write(byte b, int off, int len) throws IOException(Code) | | Writes len bytes from the specified byte array
starting at offset off to the underlying output stream.
Parameters:
b - the data.
Parameters:
off - the start offset in the data.
Parameters:
len - the number of bytes to write.
exception:
IOException - if an I/O error occurs. |
| writeBoolean | | final public void writeBoolean(boolean v) throws IOException(Code) | | 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.
Parameters:
v - a boolean value to be written.
exception:
IOException - if an I/O error occurs. |
| writeByte | | final public void writeByte(int v) throws IOException(Code) | | Writes out a byte to the underlying output stream as
a 1-byte value.
Parameters:
v - a byte value to be written.
exception:
IOException - if an I/O error occurs. |
| writeChar | | final public void writeChar(int v) throws IOException(Code) | | Writes a char to the underlying output stream as a
2-byte value, high byte first.
Parameters:
v - a char value to be written.
exception:
IOException - if an I/O error occurs. |
| writeChars | | final public void writeChars(String s) throws IOException(Code) | | 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.
Parameters:
s - a String value to be written.
exception:
IOException - if an I/O error occurs.
See Also: java.io.DataOutputStream.writeChar(int) |
| writeDouble | | final public void writeDouble(double v) throws IOException(Code) | | 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.
Parameters:
v - a double value to be written.
exception:
IOException - if an I/O error occurs.
See Also: java.lang.Double.doubleToLongBits(double)
since:
CLDC 1.1 |
| writeFloat | | final public void writeFloat(float v) throws IOException(Code) | | 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.
Parameters:
v - a float value to be written.
exception:
IOException - if an I/O error occurs.
See Also: java.lang.Float.floatToIntBits(float)
since:
CLDC 1.1 |
| writeInt | | final public void writeInt(int v) throws IOException(Code) | | Writes an int to the underlying output stream as four
bytes, high byte first.
Parameters:
v - an int to be written.
exception:
IOException - if an I/O error occurs. |
| writeLong | | final public void writeLong(long v) throws IOException(Code) | | Writes a long to the underlying output stream as eight
bytes, high byte first.
Parameters:
v - a long to be written.
exception:
IOException - if an I/O error occurs. |
| writeShort | | final public void writeShort(int v) throws IOException(Code) | | Writes a short to the underlying output stream as two
bytes, high byte first.
Parameters:
v - a short to be written.
exception:
IOException - if an I/O error occurs. |
| writeUTF | | final public void writeUTF(String str) throws IOException(Code) | | Writes a string to the underlying output stream using 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 UTF-8 encoding
for the character.
Parameters:
str - a string to be written.
exception:
IOException - if an I/O error occurs. |
| writeUTF | | final static int writeUTF(String str, DataOutput out) throws IOException(Code) | | Writes a string to the specified DataOutput using UTF-8 encoding in a
machine-independent manner.
First, two bytes are written to out 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
UTF-8 encoding for the character.
Parameters:
str - a string to be written.
Parameters:
out - destination to write to The number of bytes written out.
exception:
IOException - if an I/O error occurs. |
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