- All Implemented Interfaces:
Closeable
,DataInput
,DataOutput
,AutoCloseable
,ImageInputStream
,ImageOutputStream
ImageOutputStream
that writes its
output directly to a File
or
RandomAccessFile
.-
Field Summary
Fields declared in class javax.imageio.stream.ImageInputStreamImpl
bitOffset, byteOrder, flushedPos, streamPos
-
Constructor Summary
ConstructorDescriptionConstructs aFileImageOutputStream
that will write to a givenFile
.Constructs aFileImageOutputStream
that will write to a givenRandomAccessFile
. -
Method Summary
Modifier and TypeMethodDescriptionvoid
close()
Closes the stream.protected void
finalize()
Deprecated, for removal: This API element is subject to removal in a future version.Finalization has been deprecated for removal.long
length()
Returns-1L
to indicate that the stream has unknown length.int
read()
Reads a single byte from the stream and returns it as anint
between 0 and 255.int
read
(byte[] b, int off, int len) Reads up tolen
bytes from the stream, and stores them intob
starting at indexoff
.void
seek
(long pos) Sets the current stream position and resets the bit offset to 0.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.Methods declared in class javax.imageio.stream.ImageOutputStreamImpl
flushBits, write, writeBit, writeBits, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeChars, writeDouble, writeDoubles, writeFloat, writeFloats, writeInt, writeInts, writeLong, writeLongs, writeShort, writeShorts, writeUTF
Methods declared in class javax.imageio.stream.ImageInputStreamImpl
checkClosed, close, flush, flushBefore, getBitOffset, getByteOrder, getFlushedPosition, getStreamPosition, isCached, isCachedFile, isCachedMemory, length, mark, 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, setBitOffset, setByteOrder, skipBytes, skipBytes
Methods declared in class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods declared in interface javax.imageio.stream.ImageInputStream
flush, getBitOffset, getByteOrder, getFlushedPosition, getStreamPosition, isCached, isCachedFile, isCachedMemory, mark, 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, setBitOffset, setByteOrder, skipBytes, skipBytes
Methods declared in interface javax.imageio.stream.ImageOutputStream
flushBefore
-
Constructor Details
-
FileImageOutputStream
Constructs aFileImageOutputStream
that will write to a givenFile
.- Parameters:
f
- aFile
to write to.- Throws:
IllegalArgumentException
- iff
isnull
.SecurityException
- if a security manager exists and does not allow write access to the file.FileNotFoundException
- iff
does not denote a regular file or it cannot be opened for reading and writing for any other reason.IOException
- if an I/O error occurs.
-
FileImageOutputStream
Constructs aFileImageOutputStream
that will write to a givenRandomAccessFile
.- Parameters:
raf
- aRandomAccessFile
to write to.- Throws:
IllegalArgumentException
- ifraf
isnull
.
-
-
Method Details
-
read
Description copied from class:ImageInputStreamImpl
Reads a single byte from the stream and returns it as anint
between 0 and 255. If EOF is reached,-1
is returned.Subclasses must provide an implementation for this method. The subclass implementation should update the stream position before exiting.
The bit offset within the stream must be reset to zero before the read occurs.
- Specified by:
read
in interfaceImageInputStream
- Specified by:
read
in classImageInputStreamImpl
- Returns:
- the value of the next byte in the stream, or
-1
if EOF is reached. - Throws:
IOException
- if the stream has been closed.
-
read
Description copied from class:ImageInputStreamImpl
Reads up tolen
bytes from the stream, and stores them intob
starting at indexoff
. If no bytes can be read because the end of the stream has been reached,-1
is returned.The bit offset within the stream must be reset to zero before the read occurs.
Subclasses must provide an implementation for this method. The subclass implementation should update the stream position before exiting.
- Specified by:
read
in interfaceImageInputStream
- Specified by:
read
in classImageInputStreamImpl
- Parameters:
b
- an array of bytes to be written to.off
- the starting position withinb
to write to.len
- the maximum number of bytes to read.- Returns:
- the number of bytes actually read, or
-1
to indicate EOF. - Throws:
IOException
- if an I/O error occurs.
-
write
Description copied from interface:ImageOutputStream
Writes a single byte to the stream at the current position. The 24 high-order bits ofb
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 ofImageOutputStreamImpl
to guarantee this.- Parameters:
b
- anint
whose lower 8 bits are to be written.- Throws:
IOException
- if an I/O error occurs.
-
write
Description copied from interface:ImageOutputStream
Writes a sequence of bytes to the stream at the current position. Iflen
is 0, nothing is written. The byteb[off]
is written first, then the byteb[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 ofImageOutputStreamImpl
to guarantee this.- Parameters:
b
- an array ofbyte
s to be written.off
- the start offset in the data.len
- the number ofbyte
s to write.- Throws:
IOException
- if an I/O error occurs.
-
length
public long length()Description copied from class:ImageInputStreamImpl
Returns-1L
to indicate that the stream has unknown length. Subclasses must override this method to provide actual length information.- Specified by:
length
in interfaceImageInputStream
- Overrides:
length
in classImageInputStreamImpl
- Returns:
- -1L to indicate unknown length.
-
seek
Sets the current stream position and resets the bit offset to 0. It is legal to seeking past the end of the file; anEOFException
will be thrown only if a read is performed. The file length will not be increased until a write is performed.- Parameters:
pos
- along
containing the desired file pointer position.- Throws:
IndexOutOfBoundsException
- ifpos
is smaller than the flushed position.IOException
- if any other I/O error occurs.
-
close
Description copied from interface:ImageInputStream
Closes the stream. Attempts to access a stream that has been closed may result inIOException
s or incorrect behavior. Calling this method may allow classes implementing this interface to release resources associated with the stream such as memory, disk space, or file descriptors.- Throws:
IOException
- if an I/O error occurs.
-
finalize
Deprecated, for removal: This API element is subject to removal in a future version.Finalization has been deprecated for removal. SeeObject.finalize()
for background information and details about migration options.Finalizes this object prior to garbage collection. Theclose
method is called to close any open input source. This method should not be called from application code.- Overrides:
finalize
in classImageInputStreamImpl
- Throws:
Throwable
- if an error occurs during superclass finalization.- See Also:
-