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JavaTM 2 Platform Standard Ed. 5.0 |
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java.lang.Objectjavax.imageio.stream.ImageInputStreamImpl
javax.imageio.stream.ImageOutputStreamImpl
javax.imageio.stream.FileImageOutputStream
public class FileImageOutputStream
An implementation of ImageOutputStream that writes its
output directly to a File or
RandomAccessFile.
| Field Summary |
|---|
| Fields inherited from class javax.imageio.stream.ImageInputStreamImpl |
|---|
bitOffset, byteOrder, flushedPos, streamPos |
| Constructor Summary | |
|---|---|
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. |
|
| Method Summary | |
|---|---|
void |
close()
Closes the stream. |
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 integer 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 len bytes from array
b, in order, to
the output stream. |
void |
write(int b)
Writes to the output stream the eight low-order bits of the argument b. |
| Methods inherited from 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 inherited from class javax.imageio.stream.ImageInputStreamImpl |
|---|
checkClosed, finalize, 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, skipBytes |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Methods inherited from interface javax.imageio.stream.ImageOutputStream |
|---|
flushBefore |
| Methods inherited from 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 |
| Constructor Detail |
|---|
public 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.| Method Detail |
|---|
public int read()
throws IOException
ImageInputStreamThe bit offset within the stream is reset to zero before the read occurs.
read in interface ImageInputStreamread in class ImageInputStreamImplIOException - if an I/O error occurs.
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
DataOutputb.
The 24 high-order bits of b
are ignored.
write in interface DataOutputwrite in interface ImageOutputStreamwrite in class ImageOutputStreamImplb - the byte to be written.
IOException - if an I/O error occurs.
public void write(byte[] b,
int off,
int len)
throws IOException
DataOutputlen bytes from array
b, in order, to
the output stream. If b
is null, a NullPointerException
is thrown. If off is negative,
or len is negative, or off+len
is greater than the length of the array
b, then an IndexOutOfBoundsException
is thrown. If len is zero,
then no bytes are written. Otherwise, the
byte b[off] is written first,
then b[off+1], and so on; the
last byte written is b[off+len-1].
write in interface DataOutputwrite in interface ImageOutputStreamwrite in class ImageOutputStreamImplb - the data.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 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 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 ImageInputStreamclose in class ImageInputStreamImplIOException - if an I/O error occurs.
|
JavaTM 2 Platform Standard Ed. 5.0 |
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Copyright 2004 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.