public class FileImageOutputStream extends ImageOutputStreamImpl
An implementation of ImageOutputStream that writes its output directly to a File or RandomAccessFile.
bitOffset, byteOrder, flushedPos, streamPos public FileImageOutputStream(File f)
throws FileNotFoundException,
IOException Constructs a 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)
Constructs a FileImageOutputStream that will write to a given RandomAccessFile.
raf - a RandomAccessFile to write to.IllegalArgumentException - if raf is null.public int read()
throws IOException Description copied from class: ImageInputStreamImpl
Reads a single byte from the stream and returns it as an int 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 ImageInputStream
read 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 Description copied from class: ImageInputStreamImpl
Reads up to len 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 ImageInputStream
read in class ImageInputStreamImpl
b - 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 Description copied from interface: ImageOutputStream
Writes a single byte to the stream at the current position. The 24 high-order bits of 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 DataOutput
write in interface ImageOutputStream
write in class ImageOutputStreamImpl
b - 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 Description copied from interface: ImageOutputStream
Writes a sequence of bytes to the stream at the current position. If 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 DataOutput
write in interface ImageOutputStream
write in class ImageOutputStreamImpl
b - 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()
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.
length in interface ImageInputStream
length in class ImageInputStreamImpl
public void seek(long pos)
throws IOException Sets the current stream position and resets the bit offset to 0. It is legal to seeking past the end of the file; an 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 ImageInputStream
seek in class ImageInputStreamImpl
pos - 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 Description copied from interface: ImageInputStream
Closes the stream. Attempts to access a stream that has been closed may result in IOExceptions 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 Closeable
close in interface AutoCloseable
close in interface ImageInputStream
close in class ImageInputStreamImpl
IOException - if an I/O error occurs.protected void finalize()
throws Throwable Finalizes this object prior to garbage collection. The close method is called to close any open input source. This method should not be called from application code.
finalize in class ImageInputStreamImpl
Throwable - if an error occurs during superclass finalization.WeakReference, PhantomReference
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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