| Package | Description | 
|---|---|
| javax.imageio | 
 The main package of the Java Image I/O API. 
 | 
| 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. 
 | 
| Class and Description | 
|---|
| ImageReaderSpi
 The service provider interface (SPI) for  
ImageReaders. | 
| ImageWriterSpi
 The service provider interface (SPI) for  
ImageWriters. | 
| Class and Description | 
|---|
| IIORegistry
 A registry for service provider instances. 
 | 
| IIOServiceProvider
 A superinterface for functionality common to all Image I/O service
 provider interfaces (SPIs). 
 | 
| ImageReaderWriterSpi
 A superclass containing instance variables and methods common to
  
ImageReaderSpi and ImageWriterSpi. | 
| RegisterableService
 An optional interface that may be provided by service provider
 objects that will be registered with a
  
ServiceRegistry. | 
| ServiceRegistry
 A registry for service provider instances. 
 | 
| ServiceRegistry.Filter
 A simple filter interface used by
  
ServiceRegistry.getServiceProviders to select
 providers matching an arbitrary criterion. | 
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