java.lang.Object | +--java.io.OutputStream | +--java.io.FilterOutputStream | +--java.io.DataOutputStream
Safe:
DataOutputStream(OutputStream out)
private void
incCount(int value)
int
size()
written,
the number of bytes written to this data output stream so far.
void
write(byte[] b,
int off,
int len)
len bytes from the specified byte array
starting at offset off to the underlying output stream.
void
write(int b)
b) to the underlying output stream.
void
writeBoolean(boolean v)
boolean to the underlying output stream as
a 1-byte value.
void
writeBytes(String s)
void
writeChar(int v)
char to the underlying output stream as a
2-byte value, high byte first.
void
writeChars(String s)
void
writeDouble(double v)
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.
void
writeFloat(float v)
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.
void
writeInt(int v)
int to the underlying output stream as four
bytes, high byte first.
void
writeLong(long v)
long to the underlying output stream as eight
bytes, high byte first.
void
writeShort(int v)
short to the underlying output stream as two
bytes, high byte first.
void
writeUTF(String str)
(package private) static int
writeUTF(String str,
DataOutput out)
protected int written
public DataOutputStream(OutputStream out)
written is
set to zero.
out - the underlying output stream, to be saved for later
use.java.io.FilterOutputStream#outprivate void incCount(int value)
public void write(int b) throws IOException
b) to the underlying output stream. If no exception
is thrown, the counter written is incremented by
1.
Implements the write method of OutputStream.
write in interface DataOutputwrite in class FilterOutputStreamb - the byte to be written.
IOExceptionjava.io.FilterOutputStream#outpublic 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.
If no exception is thrown, the counter written is
incremented by len.
write in interface DataOutputwrite in class FilterOutputStreamb - the data.off - the start offset in the data.len - the number of bytes to write.
IOExceptionjava.io.FilterOutputStream#outpublic void flush() throws IOException
The flush method of DataOuputStream
calls the flush method of its underlying output stream.
flush in class FilterOutputStreamIOExceptionjava.io.FilterOutputStream#out,
java.io.OutputStream#flush()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. If no exception is
thrown, the counter written is incremented by
1.
writeBoolean in interface DataOutputv - a boolean value to be written.
IOExceptionjava.io.FilterOutputStream#outpublic final void writeByte(int v) throws IOException
byte to the underlying output stream as
a 1-byte value. If no exception is thrown, the counter
written is incremented by 1.
writeByte in interface DataOutputv - a byte value to be written.
IOExceptionjava.io.FilterOutputStream#outpublic final void writeShort(int v) throws IOException
short to the underlying output stream as two
bytes, high byte first. If no exception is thrown, the counter
written is incremented by 2.
writeShort in interface DataOutputv - a short to be written.
IOExceptionjava.io.FilterOutputStream#outpublic final void writeChar(int v) throws IOException
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.
writeChar in interface DataOutputv - a char value to be written.
IOExceptionjava.io.FilterOutputStream#outpublic final void writeInt(int v) throws IOException
int to the underlying output stream as four
bytes, high byte first. If no exception is thrown, the counter
written is incremented by 4.
writeInt in interface DataOutputv - an int to be written.
IOExceptionjava.io.FilterOutputStream#outpublic final void writeLong(long v) throws IOException
long to the underlying output stream as eight
bytes, high byte first. In no exception is thrown, the counter
written is incremented by 8.
writeLong in interface DataOutputv - a long to be written.
IOExceptionjava.io.FilterOutputStream#outpublic final void writeFloat(float v) throws IOException
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.
writeFloat in interface DataOutputv - a float value to be written.
IOExceptionjava.io.FilterOutputStream#out,
java.lang.Float#floatToIntBits(float)public final void writeDouble(double v) throws IOException
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.
writeDouble in interface DataOutputv - a double value to be written.
IOExceptionjava.io.FilterOutputStream#out,
java.lang.Double#doubleToLongBits(double)public final void writeBytes(String s) throws IOException
written is incremented by the
length of s.
writeBytes in interface DataOutputs - a string of bytes to be written.
IOExceptionjava.io.FilterOutputStream#outpublic final void writeChars(String s) throws IOException
writeChar method. If no exception is
thrown, the counter written is incremented by twice
the length of s.
writeChars in interface DataOutputs - a String value to be written.
IOExceptionjava.io.DataOutputStream#writeChar(int),
java.io.FilterOutputStream#outpublic 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. 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.
writeUTF in interface DataOutputstr - a string to be written.
IOExceptionstatic int writeUTF(String str, DataOutput out) throws IOException
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. 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.
str - a string to be written.out - destination to write to
IOExceptionpublic final int size()
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.
written field.java.io.DataOutputStream#written