JAVA : I/O

JAVA : I/O

Java's IO package mostly concerns itself with the reading of raw data from a source and writing of raw data to a destination. The most typical sources and destinations of data are these:

• Files
• Pipes
• Network Connections
• In-memory Buffers (e.g. arrays)
• System.in, System.out, System.error

Java IO Purposes and Features

Java IO contains many subclasses of the InputStream, OutputStream, Reader and Writer classes. The reason is, that all of these subclasses are addressing various different purposes. That is why there are so many different classes. The purposes addressed are summarized below:

• File Access
• Network Access
• Internal Memory Buffer Access
• Inter-Thread Communication (Pipes)
• Buffering
• Filtering
• Parsing
• Reading and Writing Text (Readers / Writers)
• Reading and Writing Primitive Data (long, int etc.)
• Reading and Writing Objects