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
Constructs a
FileImageOutputStream that will write to a given
File.
|
FileImageOutputStream(RandomAccessFile
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(Filef) 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(RandomAccessFileraf)
FileImageOutputStream that will write to a given
RandomAccessFile.
raf - a
RandomAccessFile to write to.
IllegalArgumentException - if
raf is
null.
public int read()
throws IOException
ImageInputStreamImpl
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
ImageInputStreamImpl
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
ImageOutputStream
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
ImageOutputStream
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()
ImageInputStreamImpl
-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
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
ImageInputStream
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
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