| Package | Description | 
|---|---|
| java.io | 
 Provides for system input and output through data streams,
serialization and the file system. 
 | 
| java.lang | 
 Provides classes that are fundamental to the design of the Java
 programming language. 
 | 
| java.nio | 
 Defines buffers, which are containers for data, and provides an overview of the
other NIO packages. 
 | 
| java.nio.channels | 
 Defines channels, which represent connections to entities that are capable of
 performing I/O operations, such as files and sockets; defines selectors, for
 multiplexed, non-blocking I/O operations. 
 | 
| java.nio.charset | 
 Defines charsets, decoders, and encoders, for translating between bytes and
Unicode characters. 
 | 
| java.nio.file.attribute | 
 Interfaces and classes providing access to file and file system attributes. 
 | 
| java.security | 
 Provides the classes and interfaces for the security framework. 
 | 
| java.util | 
 Contains the collections framework, legacy collection classes, event model,
date and time facilities, internationalization, and miscellaneous utility
classes (a string tokenizer, a random-number generator, and a bit array). 
 | 
| java.util.zip | 
 Provides classes for reading and writing the standard ZIP and GZIP
file formats. 
 | 
| javax.crypto | 
 Provides the classes and interfaces for cryptographic operations. 
 | 
| javax.imageio.stream | 
 A package of the Java Image I/O API dealing with low-level I/O from
files and streams. 
 | 
| javax.net.ssl | 
 Provides classes for the secure socket package. 
 | 
| Class and Description | 
|---|
| CharBuffer
 A char buffer. 
 | 
| Class and Description | 
|---|
| ByteBuffer
 A byte buffer. 
 | 
| CharBuffer
 A char buffer. 
 | 
| Class and Description | 
|---|
| Buffer
 A container for data of a specific primitive type. 
 | 
| ByteBuffer
 A byte buffer. 
 | 
| ByteOrder
 A typesafe enumeration for byte orders. 
 | 
| CharBuffer
 A char buffer. 
 | 
| DoubleBuffer
 A double buffer. 
 | 
| FloatBuffer
 A float buffer. 
 | 
| IntBuffer
 An int buffer. 
 | 
| LongBuffer
 A long buffer. 
 | 
| MappedByteBuffer
 A direct byte buffer whose content is a memory-mapped region of a file. 
 | 
| ShortBuffer
 A short buffer. 
 | 
| Class and Description | 
|---|
| ByteBuffer
 A byte buffer. 
 | 
| MappedByteBuffer
 A direct byte buffer whose content is a memory-mapped region of a file. 
 | 
| Class and Description | 
|---|
| ByteBuffer
 A byte buffer. 
 | 
| CharBuffer
 A char buffer. 
 | 
| Class and Description | 
|---|
| ByteBuffer
 A byte buffer. 
 | 
| Class and Description | 
|---|
| ByteBuffer
 A byte buffer. 
 | 
| Class and Description | 
|---|
| ByteBuffer
 A byte buffer. 
 | 
| LongBuffer
 A long buffer. 
 | 
| Class and Description | 
|---|
| ByteBuffer
 A byte buffer. 
 | 
| Class and Description | 
|---|
| ByteBuffer
 A byte buffer. 
 | 
| Class and Description | 
|---|
| ByteOrder
 A typesafe enumeration for byte orders. 
 | 
| Class and Description | 
|---|
| ByteBuffer
 A byte buffer. 
 | 
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For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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