Topic 12. Working with files: I/O streams, NIO.2, and object serialization

Goal: learn to read and write text and binary formats, close resources, and verify the integrity and validity of data.

Lecture contents

1. Paths, streams, and encoding — Paths and the working directory · Bytes, characters, and resources · Encodings and lines
2. Text and binary data — Text formats and line validation · Binary copying and numeric formats
3. Files and NIO.2 directories — Files and the directory lifecycle · Reliable updates, configuration, and archives
4. Object serialization — Serializing an object graph · Testing a file-processing program

Practice and review

• Practice — 3 worked examples with complete code
• Tasks — 30 variants, each with tasks at three difficulty levels
• Summary — conclusions, self-check questions, and useful links