← Exit to Module 9: Advanced Core Features lessons
Module progress · 0%Lesson · 15 min
Module 9: Advanced Core Features
Lesson focusString Pool & Memory Management
Understand interning, immutability, and when to reach for StringBuilder.
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
The string pool reuses literals to save memory; new String("x") bypasses the pool unless interned manually.
String concatenation inside loops creates garbage; use StringBuilder or StringJoiner.
Immutability enables thread safety and caching but requires mindful API design (avoid exposing char arrays).