Module java.desktop

Class FileImageInputStream

    • 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