Java javax.imageio.stream Class FileImageOutputStream（JDK8）

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Java™ Platform
Standard Ed. 8

All Classes

Summary:
Nested |
Field |
Constr |
Method

Detail:
Field |
Constr |
Method

java.lang.Object
- javax.imageio.stream.ImageInputStreamImpl
- - javax.imageio.stream.ImageOutputStreamImpl
  - - javax.imageio.stream.FileImageOutputStream

All Implemented Interfaces:

Closeable, DataInput, DataOutput, AutoCloseable, ImageInputStream, ImageOutputStream
```
public class FileImageOutputStream
extends ImageOutputStreamImpl
```
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

Constructors
Constructor and Description
`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

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`close()` Closes the stream.
`protected void`	`finalize()` Finalizes this object prior to garbage collection.
`long`	`length()` Returns `-1L` to indicate that the stream has unknown length.
`int`	`read()` Reads a single byte from the stream and returns it as an `int` 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, 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
  - FileImageOutputStream
```
public FileImageOutputStream(File f)
                      throws FileNotFoundException,
                             IOException
```
    Constructs a FileImageOutputStream that will write to a given File.
    
    Parameters:
    
    f - a File to write to.
    
    Throws:
    
    IllegalArgumentException - if f is null.
    
    SecurityException - if a security manager exists and does not allow write access to the file.
    
    FileNotFoundException - if f does not denote a regular file or it cannot be opened for reading and writing for any other reason.
    
    IOException - if an I/O error occurs.
  - FileImageOutputStream
```
public FileImageOutputStream(RandomAccessFile raf)
```
    Constructs a FileImageOutputStream that will write to a given RandomAccessFile.
    
    Parameters:
    
    raf - a RandomAccessFile to write to.
    
    Throws:
    
    IllegalArgumentException - if raf is null.
- Method Detail
  - read
```
public int read()
         throws IOException
```
    Description copied from class: ImageInputStreamImpl
    
    Reads a single byte from the stream and returns it as an int between 0 and 255. If EOF 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 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.
    
    Throws:
    
    IOException - if the stream has been closed.
  - 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.
  - write
```
public void write(int b)
           throws IOException
```
    Description copied from interface: ImageOutputStream
    
    Writes a single byte to the stream at the current position. The 24 high-order bits of b 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 flushBits method of ImageOutputStreamImpl to guarantee this.
    
    Specified by:
    
    write in interface DataOutput
    
    Specified by:
    
    write in interface ImageOutputStream
    
    Specified by:
    
    write in class ImageOutputStreamImpl
    
    Parameters:
    
    b - an int whose lower 8 bits are to be written.
    
    Throws:
    
    IOException - if an I/O error occurs.
  - write
```
public void write(byte[] b,
                  int off,
                  int len)
           throws IOException
```
    Description copied from interface: ImageOutputStream
    
    Writes a sequence of bytes to the stream at the current position. If len 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 flushBits method of ImageOutputStreamImpl to guarantee this.
    
    Specified by:
    
    write in interface DataOutput
    
    Specified by:
    
    write in interface ImageOutputStream
    
    Specified by:
    
    write in class ImageOutputStreamImpl
    
    Parameters:
    
    b - an array of bytes to be written.
    
    off - the start offset in the data.
    
    len - the number of bytes to write.
    
    Throws:
    
    IOException - if an I/O error occurs.
  - length
```
public long length()
```
    Description copied from class: ImageInputStreamImpl
    
    Returns -1L to indicate that the stream has unknown length. Subclasses must override this method to provide actual length information.
    
    Specified by:
    
    length in interface ImageInputStream
    
    Overrides:
    
    length in class ImageInputStreamImpl
    
    Returns:
    
    -1L to indicate unknown length.
  - seek
```
public void seek(long pos)
          throws IOException
```
    Sets the current stream position and resets the bit offset to 0. It is legal to seeking past the end of the file; an EOFException will be thrown only if a read is performed. The file length will not be increased until a write is performed.
    
    Specified by:
    
    seek in interface ImageInputStream
    
    Overrides:
    
    seek in class ImageInputStreamImpl
    
    Parameters:
    
    pos - a long containing the desired file pointer position.
    
    Throws:
    
    IndexOutOfBoundsException - if pos is smaller than the flushed position.
    
    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 Closeable
    
    Specified by:
    
    close in interface AutoCloseable
    
    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.
    
    See Also:
    
    WeakReference, PhantomReference

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Java™ Platform
Standard Ed. 8

All Classes

Summary:
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Field |
Constr |
Method

Detail:
Field |
Constr |
Method

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Java javax.imageio.stream Class FileImageOutputStream（JDK8）

Class FileImageOutputStream

Field Summary

Fields inherited from class javax.imageio.stream.ImageInputStreamImpl

Constructor Summary

Method Summary

Methods inherited from class javax.imageio.stream.ImageOutputStreamImpl

Methods inherited from class javax.imageio.stream.ImageInputStreamImpl

Methods inherited from class java.lang.Object

Methods inherited from interface javax.imageio.stream.ImageOutputStream

Methods inherited from interface javax.imageio.stream.ImageInputStream

Constructor Detail

FileImageOutputStream

FileImageOutputStream

Method Detail

read

read

write

write

length

seek

close

finalize