Class FileImageInputStream
- java.lang.Object
-
- javax.imageio.stream.ImageInputStreamImpl
-
- javax.imageio.stream.FileImageInputStream
- All Implemented Interfaces:
-
Closeable
,DataInput
,AutoCloseable
,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.
Field Summary
Fields declared in class javax.imageio.stream.ImageInputStreamImpl
bitOffset, byteOrder, flushedPos, streamPos
Constructor Summary
Constructor | Description |
---|---|
FileImageInputStream(File f) | Constructs a |
FileImageInputStream(RandomAccessFile raf) | Constructs a |
Method Summary
Modifier and Type | Method | Description |
---|---|---|
protected void | finalize() | Deprecated. The finalize method has been deprecated. |
long | length() | Returns the length of the underlying file, or |
Methods declared in class javax.imageio.stream.ImageInputStreamImpl
checkClosed, isCached, isCachedFile, isCachedMemory, mark, read, read, read, reset, skipBytes, skipBytes
Methods declared in class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods declared in interface javax.imageio.stream.ImageInputStream
close, flush, flushBefore, getBitOffset, getByteOrder, getFlushedPosition, getStreamPosition, readBit, readBits, readBoolean, readByte, readBytes, readChar, readDouble, readFloat, readFully, readFully, readFully, readFully, readFully, readFully, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedInt, readUnsignedShort, readUTF, seek, setBitOffset, setByteOrder
Constructor Detail
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
- aFile
to read from. - Throws:
-
IllegalArgumentException
- iff
isnull
. -
SecurityException
- if a security manager exists and does not allow read access to the file. -
FileNotFoundException
- iff
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
- aRandomAccessFile
to read from. - Throws:
-
IllegalArgumentException
- ifraf
isnull
.
Method Detail
length
public long length()
Returns the length of the underlying file, or -1
if it is unknown.
- Specified by:
-
length
in interfaceImageInputStream
- Overrides:
-
length
in classImageInputStreamImpl
- Returns:
- the file length as a
long
, or-1
.
finalize
@Deprecated(since="9") protected void finalize() throws Throwable
finalize
method has been deprecated. Subclasses that override finalize
in order to perform cleanup should be modified to use alternative cleanup mechanisms and to remove the overriding finalize
method. When overriding the finalize
method, its implementation must explicitly ensure that super.finalize()
is invoked as described in Object.finalize()
. See the specification for Object.finalize()
for further information about migration options.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 classImageInputStreamImpl
- Throws:
-
Throwable
- if an error occurs during superclass finalization. - See Also:
-
WeakReference
,PhantomReference