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JavaTM 2 Platform Std. Ed. v1.4.2 |
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java.lang.Objectjavax.imageio.stream.ImageInputStreamImpl
javax.imageio.stream.ImageOutputStreamImpl
javax.imageio.stream.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 the total length of the stream, if known. |
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 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 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 is a
directory or 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
public int read(byte[] b,
int off,
int len)
throws IOException
ImageInputStreamlen bytes from the stream, and stores
them into b starting at index off.
The number of bytes read is returned. If no bytes can be read
because the end of the stream has been reached, -1
is returned.
The bit offset within the stream is reset to zero before the read occurs.
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
method of flushBits to guarantee this.
ImageOutputStreamImpl
write in interface ImageOutputStreamwrite in class ImageOutputStreamImplIOException
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
method of flushBits to guarantee this.
ImageOutputStreamImpl
write in interface ImageOutputStreamwrite in class ImageOutputStreamImplIOExceptionpublic long length()
ImageInputStream-1 is returned.
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 ImageInputStreamImplIndexOutOfBoundsException - 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
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JavaTM 2 Platform Std. Ed. v1.4.2 |
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Copyright 2003 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.