CHAPTER 82 — Input and Output Streams

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Modern Java noteThis archive has been refreshed for Java 25 LTS. Core language concepts remain useful, while outdated setup instructions and browser-era Java are labeled or replaced. Java 26 is the current feature release; Java 25 is used here as the stable teaching baseline.
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created: 06/02/00; revised: 07/08/02, 06/08/03, 07/23/06

CHAPTER 82 — Input and Output Streams

This chapter discusses input and output (IO) using the package java.io. IO is done using streams. A stream is a sequence of data flowing from a source to a destination. IO streams can be connected to a wide variety of data sources and destinations.

Chapter Topics:

  • IO Streams
  • Readers and Writers
  • InputStreams and OutputStreams
  • Character data and UTF
  • Processing Streams

You have already used streams in reading data from the keyboard and in writing data to the monitor. Streams are used for much more than that.

QUESTION 1:

Java can read data from the Internet. What does this data look like to a Java program?

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