public class FileImageOutputStream extends ImageOutputStreamImpl
ImageOutputStream that writes its
output directly to a File or
RandomAccessFile.bitOffset, byteOrder, flushedPos, streamPos| Constructor and Description |
|---|
FileImageOutputStream(File f)
Constructs a
FileImageOutputStream that will write
to a given File. |
FileImageOutputStream(RandomAccessFile raf)
Constructs a
FileImageOutputStream that will write
to a given RandomAccessFile. |
| Modifier and Type | Method and Description |
|---|---|
void |
close()
Closes the stream.
|
protected void |
finalize()
Finalizes this object prior to garbage collection.
|
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 an
int between 0 and 255. |
int |
read(byte[] b,
int off,
int len)
Reads up to
len bytes from the stream, and stores
them into b starting at index off. |
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.
|
flushBits, write, writeBit, writeBits, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeChars, writeDouble, writeDoubles, writeFloat, writeFloats, writeInt, writeInts, writeLong, writeLongs, writeShort, writeShorts, writeUTFcheckClosed, flush, flushBefore, 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, skipBytesclone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitflushBeforeflush, 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, skipBytespublic FileImageOutputStream(File f) throws FileNotFoundException, IOException
FileImageOutputStream that will write
to a given File.f - a File to write to.IllegalArgumentException - if f is
null.SecurityException - if a security manager exists
and does not allow write access to the file.FileNotFoundException - if f 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.public FileImageOutputStream(RandomAccessFile raf)
FileImageOutputStream that will write
to a given RandomAccessFile.raf - a RandomAccessFile to write to.IllegalArgumentException - if raf is
null.public int read()
throws IOException
ImageInputStreamImplint 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.
read in interface ImageInputStreamread in class ImageInputStreamImpl-1
if EOF is reached.IOException - if the stream has been closed.public int read(byte[] b,
int off,
int len)
throws IOException
ImageInputStreamImpllen bytes from the stream, and stores
them into b starting at index off.
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.
read in interface ImageInputStreamread in class ImageInputStreamImplb - an array of bytes to be written to.off - the starting position within b to write to.len - the maximum number of bytes to read.-1
to indicate EOF.IOException - if an I/O error occurs.public void write(int b)
throws IOException
ImageOutputStreamb 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
flushBitsImageOutputStreamImpl
write in interface DataOutputwrite in interface ImageOutputStreamwrite in class ImageOutputStreamImplb - an int whose lower 8 bits are to be
written.IOException - if an I/O error occurs.public void write(byte[] b,
int off,
int len)
throws IOException
ImageOutputStreamlen 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
flushBitsImageOutputStreamImpl
write in interface DataOutputwrite in interface ImageOutputStreamwrite in class ImageOutputStreamImplb - an array of bytes to be written.off - the start offset in the data.len - the number of bytes to write.IOException - if an I/O error occurs.public long length()
ImageInputStreamImpl-1L to indicate that the stream has unknown
length. Subclasses must override this method to provide actual
length information.length in interface ImageInputStreamlength in class ImageInputStreamImplpublic void seek(long pos)
throws IOException
EOFException will be thrown only if a read is
performed. The file length will not be increased until a write
is performed.seek in interface ImageInputStreamseek in class ImageInputStreamImplpos - a long containing the desired file
pointer position.IndexOutOfBoundsException - if pos is smaller
than the flushed position.IOException - if any other I/O error occurs.public void close()
throws IOException
ImageInputStreamIOExceptions 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.close in interface Closeableclose in interface AutoCloseableclose in interface ImageInputStreamclose in class ImageInputStreamImplIOException - if an I/O error occurs.protected void finalize()
throws Throwable
close method is called to close any open input
source. This method should not be called from application
code.finalize in class ImageInputStreamImplThrowable - if an error occurs during superclass
finalization.