| 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.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.charset.spi | Service-provider classes for the  java.nio.charsetpackage. | 
| java.nio.file | Defines interfaces and classes for the Java virtual machine to access files,
 file attributes, and file systems. | 
| java.util.zip | Provides classes for reading and writing the standard ZIP and GZIP
file formats. | 
| javax.tools | Provides interfaces for tools which can be invoked from a program,
 for example, compilers. | 
| Class and Description | 
|---|
| Charset A named mapping between sequences of sixteen-bit Unicode code units and sequences of
 bytes. | 
| CharsetDecoder An engine that can transform a sequence of bytes in a specific charset into a sequence of
 sixteen-bit Unicode characters. | 
| CharsetEncoder An engine that can transform a sequence of sixteen-bit Unicode characters into a sequence of
 bytes in a specific charset. | 
| Class and Description | 
|---|
| Charset A named mapping between sequences of sixteen-bit Unicode code units and sequences of
 bytes. | 
| Class and Description | 
|---|
| CharsetDecoder An engine that can transform a sequence of bytes in a specific charset into a sequence of
 sixteen-bit Unicode characters. | 
| CharsetEncoder An engine that can transform a sequence of sixteen-bit Unicode characters into a sequence of
 bytes in a specific charset. | 
| Class and Description | 
|---|
| CharacterCodingException Checked exception thrown when a character encoding
 or decoding error occurs. | 
| Charset A named mapping between sequences of sixteen-bit Unicode code units and sequences of
 bytes. | 
| CharsetDecoder An engine that can transform a sequence of bytes in a specific charset into a sequence of
 sixteen-bit Unicode characters. | 
| CharsetEncoder An engine that can transform a sequence of sixteen-bit Unicode characters into a sequence of
 bytes in a specific charset. | 
| CoderResult A description of the result state of a coder. | 
| CodingErrorAction A typesafe enumeration for coding-error actions. | 
| Class and Description | 
|---|
| Charset A named mapping between sequences of sixteen-bit Unicode code units and sequences of
 bytes. | 
| Class and Description | 
|---|
| Charset A named mapping between sequences of sixteen-bit Unicode code units and sequences of
 bytes. | 
| Class and Description | 
|---|
| Charset A named mapping between sequences of sixteen-bit Unicode code units and sequences of
 bytes. | 
| Class and Description | 
|---|
| Charset A named mapping between sequences of sixteen-bit Unicode code units and sequences of
 bytes. | 
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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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