public interface ImageOutputStream extends ImageInputStream, DataOutput
ImageWriters. Various output destinations, such as
OutputStreams and Files, as well as
future fast I/O destinations may be "wrapped" by a suitable
implementation of this interface for use by the Image I/O API.
Unlike a standard OutputStream, ImageOutputStream
extends its counterpart, ImageInputStream. Thus it is
possible to read from the stream as it is being written. The same
seek and flush positions apply to both reading and writing, although
the semantics for dealing with a non-zero bit offset before a byte-aligned
write are necessarily different from the semantics for dealing with
a non-zero bit offset before a byte-aligned read. When reading bytes,
any bit offset is set to 0 before the read; when writing bytes, a
non-zero bit offset causes the remaining bits in the byte to be written
as 0s. The byte-aligned write then starts at the next byte position.
ImageInputStream| Modifier and Type | Method and Description |
|---|---|
void |
flushBefore(long pos)
Flushes all data prior to the given position to the underlying
destination, such as an
OutputStream or
File. |
void |
write(byte[] b)
Writes a sequence of bytes to the stream at the current
position.
|
void |
write(byte[] b,
int off,
int len)
Writes a sequence of bytes to the stream at the current
position.
|
void |
write(int b)
Writes a single byte to the stream at the current position.
|
void |
writeBit(int bit)
Writes a single bit, given by the least significant bit of the
argument, to the stream at the current bit offset within the
current byte position.
|
void |
writeBits(long bits,
int numBits)
Writes a sequence of bits, given by the
numBits
least significant bits of the bits argument in
left-to-right order, to the stream at the current bit offset
within the current byte position. |
void |
writeBoolean(boolean v)
Writes a
boolean value to the stream. |
void |
writeByte(int v)
Writes the 8 low-order bits of
v to the
stream. |
void |
writeBytes(String s)
Writes a string to the output stream.
|
void |
writeChar(int v)
This method is a synonym for
writeShort. |
void |
writeChars(char[] c,
int off,
int len)
Writes a sequence of chars to the stream at the current
position.
|
void |
writeChars(String s)
Writes a string to the output stream.
|
void |
writeDouble(double v)
Writes a
double value, which is comprised of four
bytes, to the output stream. |
void |
writeDoubles(double[] d,
int off,
int len)
Writes a sequence of doubles to the stream at the current
position.
|
void |
writeFloat(float v)
Writes a
float value, which is comprised of four
bytes, to the output stream. |
void |
writeFloats(float[] f,
int off,
int len)
Writes a sequence of floats to the stream at the current
position.
|
void |
writeInt(int v)
Writes the 32 bits of
v to the stream. |
void |
writeInts(int[] i,
int off,
int len)
Writes a sequence of ints to the stream at the current
position.
|
void |
writeLong(long v)
Writes the 64 bits of
v to the stream. |
void |
writeLongs(long[] l,
int off,
int len)
Writes a sequence of longs to the stream at the current
position.
|
void |
writeShort(int v)
Writes the 16 low-order bits of
v to the
stream. |
void |
writeShorts(short[] s,
int off,
int len)
Writes a sequence of shorts to the stream at the current
position.
|
void |
writeUTF(String s)
Writes two bytes of length information to the output stream in
network byte order, followed by the
modified
UTF-8
representation of every character in the string
s. |
close, flush, getBitOffset, getByteOrder, getFlushedPosition, getStreamPosition, isCached, isCachedFile, isCachedMemory, length, mark, read, read, read, readBit, readBits, readBoolean, readByte, readBytes, readChar, readDouble, readFloat, readFully, readFully, readFully, readFully, readFully, readFully, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedInt, readUnsignedShort, readUTF, reset, seek, setBitOffset, setByteOrder, skipBytes, skipBytesvoid write(int b)
throws IOException
b are ignored.
If the bit offset within the stream is non-zero, the
remainder of the current byte is padded with 0s
and written out first. The bit offset will be 0 after the
write. Implementers can use the
flushBits
method of ImageOutputStreamImpl
to guarantee this.
write in interface DataOutputb - an int whose lower 8 bits are to be
written.IOException - if an I/O error occurs.void write(byte[] b)
throws IOException
b.length is 0, nothing is written.
The byte b[0] is written first, then the byte
b[1], and so on.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
write in interface DataOutputb - an array of bytes to be written.NullPointerException - if b is
null.IOException - if an I/O error occurs.void write(byte[] b,
int off,
int len)
throws IOException
len is 0, nothing is written.
The byte b[off] is written first, then the byte
b[off + 1], and so on.
If the bit offset within the stream is non-zero, the
remainder of the current byte is padded with 0s
and written out first. The bit offset will be 0 after the
write. Implementers can use the
flushBits
method of ImageOutputStreamImpl
to guarantee this.
write in interface DataOutputb - an array of bytes to be written.off - the start offset in the data.len - the number of bytes to write.IndexOutOfBoundsException - if off is
negative, len is negative, or off +
len is greater than b.length.NullPointerException - if b is
null.IOException - if an I/O error occurs.void writeBoolean(boolean v)
throws IOException
boolean value to the stream. If
v is true, the value (byte)1 is
written; if v is false, the value
(byte)0 is written.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
writeBoolean in interface DataOutputv - the boolean to be written.IOException - if an I/O error occurs.void writeByte(int v)
throws IOException
v to the
stream. The 24 high-order bits of v are ignored.
(This means that writeByte does exactly the same
thing as write for an integer argument.)
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
writeByte in interface DataOutputv - an int containing the byte value to be
written.IOException - if an I/O error occurs.void writeShort(int v)
throws IOException
v to the
stream. The 16 high-order bits of v are ignored.
If the stream uses network byte order, the bytes written, in
order, will be:
(byte)((v >> 8) & 0xff) (byte)(v & 0xff)Otherwise, the bytes written will be:
(byte)(v & 0xff) (byte)((v >> 8) & 0xff)
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
writeShort in interface DataOutputv - an int containing the short value to be
written.IOException - if an I/O error occurs.void writeChar(int v)
throws IOException
writeShort.writeChar in interface DataOutputv - an int containing the char (unsigned
short) value to be written.IOException - if an I/O error occurs.writeShort(int)void writeInt(int v)
throws IOException
v to the stream. If the
stream uses network byte order, the bytes written, in order,
will be:
(byte)((v >> 24) & 0xff) (byte)((v >> 16) & 0xff) (byte)((v >> 8) & 0xff) (byte)(v & 0xff)Otheriwse, the bytes written will be:
(byte)(v & 0xff) (byte)((v >> 8) & 0xff) (byte)((v >> 16) & 0xff) (byte)((v >> 24) & 0xff)
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
writeInt in interface DataOutputv - an int containing the value to be
written.IOException - if an I/O error occurs.void writeLong(long v)
throws IOException
v to the stream. If the
stream uses network byte order, the bytes written, in order,
will be:
(byte)((v >> 56) & 0xff) (byte)((v >> 48) & 0xff) (byte)((v >> 40) & 0xff) (byte)((v >> 32) & 0xff) (byte)((v >> 24) & 0xff) (byte)((v >> 16) & 0xff) (byte)((v >> 8) & 0xff) (byte)(v & 0xff)Otherwise, the bytes written will be:
(byte)(v & 0xff) (byte)((v >> 8) & 0xff) (byte)((v >> 16) & 0xff) (byte)((v >> 24) & 0xff) (byte)((v >> 32) & 0xff) (byte)((v >> 40) & 0xff) (byte)((v >> 48) & 0xff) (byte)((v >> 56) & 0xff)
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
writeLong in interface DataOutputv - a long containing the value to be
written.IOException - if an I/O error occurs.void writeFloat(float v)
throws IOException
float value, which is comprised of four
bytes, to the output stream. It does this as if it first
converts this float value to an int
in exactly the manner of the Float.floatToIntBits
method and then writes the int value in exactly the manner of
the writeInt method.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
writeFloat in interface DataOutputv - a float containing the value to be
written.IOException - if an I/O error occurs.void writeDouble(double v)
throws IOException
double value, which is comprised of four
bytes, to the output stream. It does this as if it first
converts this double value to an long
in exactly the manner of the
Double.doubleToLongBits method and then writes the
long value in exactly the manner of the writeLong
method.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
writeDouble in interface DataOutputv - a double containing the value to be
written.IOException - if an I/O error occurs.void writeBytes(String s) throws IOException
s, taken in order, one byte is written
to the output stream. If s is null, a
NullPointerException is thrown.
If s.length is zero, then no bytes are
written. Otherwise, the character s[0] is written
first, then s[1], and so on; the last character
written is s[s.length-1]. For each character, one
byte is written, the low-order byte, in exactly the manner of
the writeByte method. The high-order eight bits of
each character in the string are ignored.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
writeBytes in interface DataOutputs - a String containing the value to be
written.NullPointerException - if s is
null.IOException - if an I/O error occurs.void writeChars(String s) throws IOException
s, taken in order, two bytes are
written to the output stream, ordered according to the current
byte order setting. If network byte order is being used, the
high-order byte is written first; the order is reversed
otherwise. If s is null, a
NullPointerException is thrown.
If s.length is zero, then no bytes are
written. Otherwise, the character s[0] is written
first, then s[1], and so on; the last character
written is s[s.length-1].
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
writeChars in interface DataOutputs - a String containing the value to be
written.NullPointerException - if s is
null.IOException - if an I/O error occurs.void writeUTF(String s) throws IOException
s.
If s is null, a
NullPointerException is thrown. Each character in
the string s is converted to a group of one, two,
or three bytes, depending on the value of the character.
If a character c is in the range
\u0001 through \u007f, it is
represented by one byte:
(byte)c
If a character c is \u0000 or
is in the range \u0080 through
\u07ff, then it is represented by two bytes,
to be written in the order shown:
(byte)(0xc0 | (0x1f & (c >> 6)))
(byte)(0x80 | (0x3f & c))
If a character c is in the range
\u0800 through uffff, then it is
represented by three bytes, to be written in the order shown:
(byte)(0xe0 | (0x0f & (c >> 12)))
(byte)(0x80 | (0x3f & (c >> 6)))
(byte)(0x80 | (0x3f & c))
First, the total number of bytes needed to represent all
the characters of s is calculated. If this number
is larger than 65535, then a
UTFDataFormatException is thrown. Otherwise, this
length is written to the output stream in exactly the manner of
the writeShort method; after this, the one-, two-,
or three-byte representation of each character in the string
s is written.
The current byte order setting is ignored.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
Note: This method should not be used in the implementation of image formats that use standard UTF-8, because the modified UTF-8 used here is incompatible with standard UTF-8.
writeUTF in interface DataOutputs - a String containing the value to be
written.NullPointerException - if s is
null.UTFDataFormatException - if the modified UTF-8
representation of s requires more than 65536 bytes.IOException - if an I/O error occurs.void writeShorts(short[] s,
int off,
int len)
throws IOException
len is 0, nothing is written.
The short s[off] is written first, then the short
s[off + 1], and so on. The byte order of the
stream is used to determine the order in which the individual
bytes are written.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
s - an array of shorts to be written.off - the start offset in the data.len - the number of shorts to write.IndexOutOfBoundsException - if off is
negative, len is negative, or off +
len is greater than s.length.NullPointerException - if s is
null.IOException - if an I/O error occurs.void writeChars(char[] c,
int off,
int len)
throws IOException
len is 0, nothing is written.
The char c[off] is written first, then the char
c[off + 1], and so on. The byte order of the
stream is used to determine the order in which the individual
bytes are written.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
c - an array of chars to be written.off - the start offset in the data.len - the number of chars to write.IndexOutOfBoundsException - if off is
negative, len is negative, or off +
len is greater than c.length.NullPointerException - if c is
null.IOException - if an I/O error occurs.void writeInts(int[] i,
int off,
int len)
throws IOException
len is 0, nothing is written.
The int i[off] is written first, then the int
i[off + 1], and so on. The byte order of the
stream is used to determine the order in which the individual
bytes are written.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
i - an array of ints to be written.off - the start offset in the data.len - the number of ints to write.IndexOutOfBoundsException - if off is
negative, len is negative, or off +
len is greater than i.length.NullPointerException - if i is
null.IOException - if an I/O error occurs.void writeLongs(long[] l,
int off,
int len)
throws IOException
len is 0, nothing is written.
The long l[off] is written first, then the long
l[off + 1], and so on. The byte order of the
stream is used to determine the order in which the individual
bytes are written.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
l - an array of longs to be written.off - the start offset in the data.len - the number of longs to write.IndexOutOfBoundsException - if off is
negative, len is negative, or off +
len is greater than l.length.NullPointerException - if l is
null.IOException - if an I/O error occurs.void writeFloats(float[] f,
int off,
int len)
throws IOException
len is 0, nothing is written.
The float f[off] is written first, then the float
f[off + 1], and so on. The byte order of the
stream is used to determine the order in which the individual
bytes are written.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
f - an array of floats to be written.off - the start offset in the data.len - the number of floats to write.IndexOutOfBoundsException - if off is
negative, len is negative, or off +
len is greater than f.length.NullPointerException - if f is
null.IOException - if an I/O error occurs.void writeDoubles(double[] d,
int off,
int len)
throws IOException
len is 0, nothing is written.
The double d[off] is written first, then the double
d[off + 1], and so on. The byte order of the
stream is used to determine the order in which the individual
bytes are written.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
d - an array of doubless to be written.off - the start offset in the data.len - the number of doubles to write.IndexOutOfBoundsException - if off is
negative, len is negative, or off +
len is greater than d.length.NullPointerException - if d is
null.IOException - if an I/O error occurs.void writeBit(int bit)
throws IOException
If any bits of a particular byte have never been set at the time the byte is flushed to the destination, those bits will be set to 0 automatically.
bit - an int whose least significant bit
is to be written to the stream.IOException - if an I/O error occurs.void writeBits(long bits,
int numBits)
throws IOException
numBits
least significant bits of the bits argument in
left-to-right order, to the stream at the current bit offset
within the current byte position. The upper 64 -
numBits bits of the argument are ignored. The bit
offset is advanced by numBits and reduced modulo
8. Note that a bit offset of 0 always indicates the
most-significant bit of the byte, and bytes of bits are written
out in sequence as they are encountered. Thus bit writes are
always effectively in network byte order. The actual stream
byte order setting is ignored.
Bit data may be accumulated in memory indefinitely, until
flushBefore is called. At that time, all bit data
prior to the flushed position will be written.
If any bits of a particular byte have never been set at the time the byte is flushed to the destination, those bits will be set to 0 automatically.
bits - a long containing the bits to be
written, starting with the bit in position numBits -
1 down to the least significant bit.numBits - an int between 0 and 64, inclusive.IllegalArgumentException - if numBits is
not between 0 and 64, inclusive.IOException - if an I/O error occurs.void flushBefore(long pos)
throws IOException
OutputStream or
File. Attempting to seek to the flushed portion
of the stream will result in an
IndexOutOfBoundsException.flushBefore in interface ImageInputStreampos - a long containing the length of the
stream prefix that may be flushed to the destination.IndexOutOfBoundsException - if pos lies
in the flushed portion of the stream or past the current stream
position.IOException - if an I/O error occurs. Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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