← Exit to Module 9: Advanced Core Features lessons
Module progress · 0%Lesson · 20 min
Module 9: Advanced Core Features
Lesson focusRegular Expressions, Pattern & Matcher
Parse text with regex using the Pattern/Matcher 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
Compile regex patterns once (Pattern.compile) to avoid reparsing.
Use named groups ((?<area>\d{3})) and Matcher.group("area") for clarity.
Beware catastrophic backtracking—anchor patterns and keep quantifiers specific.