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.

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

Since:
1.4
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 Image I/O 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 for Image I/O service types.

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Documentation extracted from Debian's OpenJDK Development Kit package.
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https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/imageio/spi/package-summary.html