| Package | Description | 
|---|---|
| java.io | 
 Provides for system input and output through data streams,
serialization and the file system. 
 | 
| java.rmi.server | 
 Provides classes and interfaces for supporting the server
side of RMI. 
 | 
| java.security | 
 Provides the classes and interfaces for the security framework. 
 | 
| java.util.jar | 
 Provides classes for reading and writing the JAR (Java ARchive) file
format, which is based on the standard ZIP file format with an
optional manifest file. 
 | 
| 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. 
 | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
BufferedOutputStream
The class implements a buffered output stream. 
 | 
class  | 
DataOutputStream
A data output stream lets an application write primitive Java data
 types to an output stream in a portable way. 
 | 
class  | 
PrintStream
A  
PrintStream adds functionality to another output stream,
 namely the ability to print representations of various data values
 conveniently. | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
LogStream
Deprecated. 
 
no replacement 
 | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
DigestOutputStream
A transparent stream that updates the associated message digest using
 the bits going through the stream. 
 | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
JarOutputStream
The  
JarOutputStream class is used to write the contents
 of a JAR file to any output stream. | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
CheckedOutputStream
An output stream that also maintains a checksum of the data being
 written. 
 | 
class  | 
DeflaterOutputStream
This class implements an output stream filter for compressing data in
 the "deflate" compression format. 
 | 
class  | 
GZIPOutputStream
This class implements a stream filter for writing compressed data in
 the GZIP file format. 
 | 
class  | 
InflaterOutputStream
Implements an output stream filter for uncompressing data stored in the
 "deflate" compression format. 
 | 
class  | 
ZipOutputStream
This class implements an output stream filter for writing files in the
 ZIP file format. 
 | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
CipherOutputStream
A CipherOutputStream is composed of an OutputStream and a Cipher so
 that write() methods first process the data before writing them out
 to the underlying OutputStream. 
 | 
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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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