| 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. | 
 Submit a bug or feature 
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.
 Copyright © 1993, 2023, Oracle and/or its affiliates.  All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.