Java Module java.desktop Package javax.imageio.stream Class FileImageInputStream（JDK11）

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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

Constructors
Constructor	Description
`FileImageInputStream(File f)`	Constructs a `FileImageInputStream` that will read from a given `File`.
`FileImageInputStream(RandomAccessFile raf)`	Constructs a `FileImageInputStream` that will read from a given `RandomAccessFile`.

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
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 `-1` if it is unknown.

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 - 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.
- Method Detail
  - 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.
  - finalize
```
@Deprecated(since="9")
protected void finalize()
                 throws Throwable
```
    Deprecated.
    The 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 class ImageInputStreamImpl
    Throws:
    Throwable - if an error occurs during superclass finalization.
    See Also:
    WeakReference, PhantomReference

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Java Module java.desktop Package javax.imageio.stream Class FileImageInputStream（JDK11）

Class FileImageInputStream

Field Summary

Fields declared in class javax.imageio.stream.ImageInputStreamImpl

Constructor Summary

Method Summary

Methods declared in class javax.imageio.stream.ImageInputStreamImpl

Methods declared in class java.lang.Object

Methods declared in interface javax.imageio.stream.ImageInputStream

Constructor Detail

FileImageInputStream

FileImageInputStream

Method Detail

length

finalize