← Exit to Module 9: Advanced Core Features lessons
Module progress · 0%Lesson · 18 min
Module 9: Advanced Core Features
Lesson focusFile I/O with java.io
Read, write, and buffer text/binary streams using the classic IO APIs.
01 · 15 minString Pool & Memory ManagementLocked02 · 12 minStringBuilder vs StringBufferLocked03 · 16 minFormatting & LocalizationLocked04 · 20 minRegular Expressions, Pattern & MatcherLocked05 · 18 minFile I/O with java.ioLocked06 · 18 minModern I/O with NIO.2Locked07 · 15 minSerialization BasicsLocked08 · 14 minOptional Usage PatternsLocked09 · 30 minMini-Project: Log File AnalyzerLocked
Wrap FileInputStream in BufferedInputStream to reduce disk calls; use InputStreamReader for charset conversion.
Always close streams in try-with-resources to prevent leaks.
For small files, Files.readAllLines or readString simplify operations.