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java.lang.Objectjava.io.OutputStream
java.io.DataOutputStream
@TransactionType(value=NOT_SUPPORTED) public class 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.
DataInputStream| Field Summary | |
|---|---|
protected OutputStream |
out
The output stream. |
| Constructor Summary | |
|---|---|
DataOutputStream(OutputStream out)
Creates a new data output stream to write data to the specified underlying output stream. |
|
| Method Summary | |
|---|---|
void |
close()
Closes this output stream and releases any system resources associated with the stream. |
void |
flush()
Flushes this data output stream. |
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. |
void |
write(int b)
Writes the specified byte (the low eight bits of the argument b) to the underlying output stream. |
void |
writeBoolean(boolean v)
Writes a boolean to the underlying output stream as a
1-byte value. |
void |
writeByte(int v)
Writes out a byte to the underlying output stream as a
1-byte value. |
void |
writeChar(int v)
Writes a char to the underlying output stream as a 2-byte
value, high byte first. |
void |
writeChars(String s)
Writes a string to the underlying output stream as a sequence of characters. |
void |
writeInt(int v)
Writes an int to the underlying output stream as four
bytes, high byte first. |
void |
writeLong(long v)
Writes a long to the underlying output stream as eight
bytes, high byte first. |
void |
writeShort(int v)
Writes a short to the underlying output stream as two
bytes, high byte first. |
void |
writeUTF(String str)
Writes a string to the underlying output stream using UTF-8 encoding in a machine-independent manner. |
| Methods inherited from class java.io.OutputStream |
|---|
write |
| Methods inherited from class java.lang.Object |
|---|
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Methods inherited from interface java.io.DataOutput |
|---|
write |
| Field Detail |
|---|
protected OutputStream out
| Constructor Detail |
|---|
public DataOutputStream(OutputStream out)
out - the underlying output stream, to be saved for later use.| Method Detail |
|---|
public void write(int b)
throws IOException
b) to the underlying output stream.
Implements the write method of OutputStream.
write in interface DataOutputwrite in class OutputStreamb - the byte to be written.
IOException - if an I/O error occurs.
public void write(byte[] b,
int off,
int len)
throws IOException
len bytes from the specified byte array starting at
offset off to the underlying output stream.
write in interface DataOutputwrite in class OutputStreamb - the data.off - the start offset in the data.len - the number of bytes to write.
IOException - if an I/O error occurs.
public void flush()
throws IOException
The flush method of DataOutputStream calls
the flush method of its underlying output stream.
flush in class OutputStreamIOException - if an I/O error occurs.
public void close()
throws IOException
The close method calls its flush method,
and then calls the close method of its underlying output
stream.
close in class OutputStreamIOException - if an I/O error occurs.
public final void writeBoolean(boolean v)
throws IOException
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.
writeBoolean in interface DataOutputv - a boolean value to be written.
IOException - if an I/O error occurs.
public final void writeByte(int v)
throws IOException
byte to the underlying output stream as a
1-byte value.
writeByte in interface DataOutputv - a byte value to be written.
IOException - if an I/O error occurs.
public final void writeShort(int v)
throws IOException
short to the underlying output stream as two
bytes, high byte first.
writeShort in interface DataOutputv - a short to be written.
IOException - if an I/O error occurs.
public final void writeChar(int v)
throws IOException
char to the underlying output stream as a 2-byte
value, high byte first.
writeChar in interface DataOutputv - a char value to be written.
IOException - if an I/O error occurs.
public final void writeInt(int v)
throws IOException
int to the underlying output stream as four
bytes, high byte first.
writeInt in interface DataOutputv - an int to be written.
IOException - if an I/O error occurs.
public final void writeLong(long v)
throws IOException
long to the underlying output stream as eight
bytes, high byte first.
writeLong in interface DataOutputv - a long to be written.
IOException - if an I/O error occurs.
public final void writeChars(String s)
throws IOException
writeChar method.
writeChars in interface DataOutputs - a String value to be written.
IOException - if an I/O error occurs.writeChar(int)
public final void writeUTF(String str)
throws IOException
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.
writeUTF in interface DataOutputstr - a string to be written.
IOException - if an I/O error occurs.
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