HashSet in Java
Learn HashSet: unique element collections backed by HashMap, contains and add operations, and the internal ELEMENT object pattern.
Posts tagged with #java-fundamentals
HashMap in Java
Understand HashMap: key-value storage with O(1) average lookups, hash collisions, rehashing, and performance characteristics.
If-Else Statements in Java
Learn Java if-else branching logic: conditional statements, else-if chains, nested conditionals, and operator precedence considerations for decision making.
Inheritance in Java
Master Java inheritance: extends keyword, super, method overriding, and the substitutability principle.
Interfaces in Java
Master pure contracts: default methods, static methods, functional interfaces, and how interfaces define behavior in Java.
java.io and java.nio.file
Read, write, and navigate files with java.io and java.nio.file: Path, Files, BufferedReader, BufferedWriter, and directory walking.
Iterating Collections in Java
Master Java collection iteration: Iterator and ListIterator interfaces, for-each loop, fail-fast behavior, and concurrent modification.
Lambda Expressions
(params) -> expression or (params) -> { statements } — write concise function literals in Java for functional interfaces.
LinkedList in Java
Explore Java's doubly-linked list: insertion and removal performance, when LinkedList beats ArrayList, and memory trade-offs.
Method Anatomy
Learn how to read and write Java methods — access modifiers, return types, parameters, and the method body that holds the logic.