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
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Constructor Summary
Constructors Constructor Description FileImageInputStream(File f)
Constructs aFileImageInputStream
that will read from a givenFile
.FileImageInputStream(RandomAccessFile raf)
Constructs aFileImageInputStream
that will read from a givenRandomAccessFile
. -
Method Summary
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
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Constructor Details
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FileImageInputStream
Constructs aFileImageInputStream
that will read from a givenFile
.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.
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FileImageInputStream
Constructs aFileImageInputStream
that will read from a givenRandomAccessFile
.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
.
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Method Details
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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
.
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finalize
Deprecated.Thefinalize
method has been deprecated. Subclasses that overridefinalize
in order to perform cleanup should be modified to use alternative cleanup mechanisms and to remove the overridingfinalize
method. When overriding thefinalize
method, its implementation must explicitly ensure thatsuper.finalize()
is invoked as described inObject.finalize()
. See the specification forObject.finalize()
for further information about migration options.Finalizes this object prior to garbage collection. Theclose
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
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