TopBlend:
Here is the
first difference.
There are 10 differences.
is old.
is new.
javax.imageio.stream
Class FileImageInputStream
java.lang.Object
javax.imageio.stream.ImageInputStreamImpl
javax.imageio.stream.FileImageInputStream
-
All Implemented Interfaces:
-
DataInput
,
ImageInputStream
-
public class FileImageInputStream
- extends ImageInputStreamImpl
An implementation of ImageInputStream that gets its input from a File or RandomAccessFile. The file contents are assumed to be stable during the lifetime of the object.
Method Summary
|
void |
close
()
Closes the stream. |
protected void
|
finalize
()
Finalizes this object prior to garbage collection.
|
long |
length
()
Returns the length of the underlying file, or -1 if it is unknown. |
int |
read
()
Reads a single byte from the stream and returns it as an
int
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 to the desired location. |
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
|
FileImageInputStream
public FileImageInputStream(File f)
throws FileNotFoundException,
IOException
-
Constructs a FileImageInputStream that will read from a given File.
The file contents must not change between the time this object is constructed and the time of the last call to a read method.
-
Parameters:
-
f - a File to read from.
-
Throws:
-
IllegalArgumentException
- if f is null.
-
SecurityException
- if a security manager exists and does not allow read access to the file.
-
FileNotFoundException
- if f is a directory or cannot be opened for reading for any other reason.
-
IOException
- if an I/O error occurs.
FileImageInputStream
public FileImageInputStream(RandomAccessFile raf)
-
Constructs a FileImageInputStream that will read from a given RandomAccessFile.
The file contents must not change between the time this object is constructed and the time of the last call to a read method.
-
Parameters:
-
raf - a RandomAccessFile to read from.
-
Throws:
-
IllegalArgumentException
- if raf is null.
read
public int read()
throws IOException
-
Description copied from
class:
ImageInputStreamImpl
interface:
ImageInputStream
-
Reads a single byte from the stream and returns it as an
int
integer
between 0 and 255. If
EOF
the end of the stream
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 is reset to zero before the read occurs.
The bit offset within the stream must be reset to zero before the read occurs.
-
-
Specified by:
-
read
in interface
ImageInputStream
-
Specified by:
-
read
in class
ImageInputStreamImpl
-
-
Returns:
-
the value of the next byte in the stream, or -1 if EOF is reached.
a byte value from the stream, as an int, or -1 to indicate EOF.
-
Throws:
-
IOException
- if the stream has been closed.
- if an I/O error occurs.
read
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.
-
-
Specified by:
-
read
in interface
ImageInputStream
-
Specified by:
-
read
in class
ImageInputStreamImpl
-
-
Parameters:
-
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.
-
Returns:
-
the number of bytes actually read, or -1 to indicate EOF.
-
Throws:
-
IOException
- if an I/O error occurs.
length
public long length()
-
Returns the length of the underlying file, or -1 if it is unknown.
-
-
Specified by:
-
length
in interface
ImageInputStream
-
Overrides:
-
length
in class
ImageInputStreamImpl
-
-
Returns:
-
the file length as a long, or -1.
seek
public void seek(long pos)
throws IOException
-
Description copied from interface:
ImageInputStream
-
Sets the current stream position to the desired location. The next read will occur at this location. The bit offset is set to 0.
An IndexOutOfBoundsException will be thrown if pos is smaller than the flushed position (as returned by getflushedPosition).
It is legal to seek past the end of the file; an EOFException will be thrown only if a read is performed.
-
-
Specified by:
-
seek
in interface
ImageInputStream
-
Overrides:
-
seek
in class
ImageInputStreamImpl
-
-
Parameters:
-
pos - a long containing the desired file pointer position.
-
Throws:
-
IOException
- if any other I/O error occurs.
close
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.
-
-
Specified by:
-
close
in interface
ImageInputStream
-
Overrides:
-
close
in class
ImageInputStreamImpl
-
-
Throws:
-
IOException
- if an I/O error occurs.
finalize
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.
-
-
Overrides:
-
finalize
in class
ImageInputStreamImpl
-
-
Throws:
-
Throwable
- if an error occurs during superclass finalization.