Documentation Contents

Java I/O support is included in the java.io and java.nio packages. Together these packages include the following features:

• File and device I/O
• Object serialization
• Buffers for data of primitive types
• Character-set encoders and decoders
• Channels, a new primitive I/O abstraction
• A file interface that supports locks and memory mapping
• A multiplexed, non-blocking I/O facility for writing scalable servers

API Specification

• java.io (description) - Supports system input and output, object serialization, and basic access to the file system
• java.nio (description) - Defines buffers for bulk memory operations. Buffers may be allocated in direct memory for high performance.
• java.nio.channels (description) - Defines channels, an abstraction for devices capable of performing I/O operations; defines selectors for multiplexed, non-blocking I/O
• java.nio.channels.spi (description) - Provides implementations for channels
• java.nio.charset (description) - Defines charsets, decoders, and encoders, for translating between bytes and Unicode characters
• java.nio.charset.spi (description) - Provides implementations for charsets

Examples

• NIO Examples

Enhancements

• Enhancements in Java SE 6
• Enhancements in J2SE 5.0
• Enhancements in J2SDK 1.4
• Previous Enhancements

More Information

• Supported Encodings
• The Java Tutorial
• Object Serialization
• Troubleshooting tips

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