Package javax.imageio.spi

A package of the Java Image I/O API containing the plug-in interfaces for readers, writers, transcoders, and streams, and a runtime registry.

See: Description

Interface Description
RegisterableService

An optional interface that may be provided by service provider objects that will be registered with a ServiceRegistry.
ServiceRegistry.Filter

A simple filter interface used by ServiceRegistry.getServiceProviders to select providers matching an arbitrary criterion.
Class Description
IIORegistry

A registry for service provider instances.
IIOServiceProvider

A superinterface for functionality common to all Image I/O service provider interfaces (SPIs).
ImageInputStreamSpi

The service provider interface (SPI) for ImageInputStreams.
ImageOutputStreamSpi

The service provider interface (SPI) for ImageOutputStreams.
ImageReaderSpi

The service provider interface (SPI) for ImageReaders.
ImageReaderWriterSpi

A superclass containing instance variables and methods common to ImageReaderSpi and ImageWriterSpi.
ImageTranscoderSpi

The service provider interface (SPI) for ImageTranscoders.
ImageWriterSpi

The service provider interface (SPI) for ImageWriters.
ServiceRegistry

A registry for service provider instances.

Package javax.imageio.spi Description

A package of the Java Image I/O API containing the plug-in interfaces for readers, writers, transcoders, and streams, and a runtime registry.

The javax.imageio.spi package contains service provider interfaces for reading, writing, and transcoding images, and obtaining input and output streams, as well as a run-time registry that discovers installed service provider instances and allows new instances to be registered dynamically.

Since:
1.4

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https://docs.oracle.com/javase/8/docs/api/javax/imageio/spi/package-summary.html