SERIES_OVERVIEW // CURRICULUM_MAP

Learn Java Array, Collections, Iterator/Iterable, Stream

// Kaufman skill map untuk menguasai Java Array, Collections, Iterator/Iterable, Spliterator, dan Stream secara production-grade.

32 Lessons458 Min Total04 Phases

This overview is designed to help you choose the right entry point quickly. Follow the full track from lesson one, continue from your last checkpoint, or jump straight into a phase that matches what you need right now.

Start From First Lesson Open Curriculum Map

aggregationallocationanti-patternsapi-designarchitecture+124 more

Phase 01 · Start Here Phase 02 · Build Core Phase 03 · Deepen Practice Phase 04 · Final Stretch

Curriculum Map

Navigate by phase, then choose the lesson that matches your current depth.

Kaufman Skill Map

20 min

Kaufman skill map untuk menguasai Java Array, Collections, Iterator/Iterable, Spliterator, dan Stream secara production-grade.

In-Memory Data Modeling

20 min

Mental model production-grade untuk menerjemahkan domain facts menjadi in-memory data model Java yang tepat sebelum memilih array, collection, iterator, atau stream.

Java Arrays Deep Dive

15 min

Deep dive Java arrays sebagai object runtime, type model khusus, primitive/reference array, covariance, default value, bounds check, aliasing, clone, reflection, generic array trap, dan API boundary.

Array Memory Layout, Locality, and Performance Reasoning

16 min

Mental model memory layout, locality, primitive density, boxed object overhead, pointer chasing, allocation pressure, bounds-check optimization, escape analysis, dan performance reasoning untuk array Java.

Arrays Utility API

16 min

Deep dive java.util.Arrays untuk sorting, searching, copying, comparing, filling, stringifying, stream bridge, dan boundary design.

Array Design Patterns and Anti-Patterns

16 min

Pola desain array dan anti-pattern dalam production Java, termasuk fixed buffer, ring buffer, sparse array, sentinel, parallel arrays, dan API boundary.

Java Collections Framework Architecture

15 min

Arsitektur Java Collections Framework secara contract-first, termasuk interface hierarchy, implementation families, optional operations, structural modification, views, wrappers, algorithms, dan decision model production.

Collection Contracts: Equality, Hashing, Ordering, Mutability

11 min

Kontrak fundamental Java Collections: equals, hashCode, Comparable, Comparator, ordering, duplicate semantics, null policy, mutable keys/elements, dan failure modeling di production.

List Deep Dive: Positional Access, Ordering, and Structural Mutation

16 min

Deep dive List di Java: positional access, encounter order, ArrayList vs LinkedList, RandomAccess, subList view, structural mutation, List.of/copyOf, dan production selection rules.

Set Deep Dive: Uniqueness, Identity, Hashing, and Ordering

16 min

Deep dive Set di Java: uniqueness boundary, HashSet, LinkedHashSet, TreeSet, EnumSet, equality vs identity, hashing, ordering, duplicate handling, set algebra, dan production correctness.

Map Deep Dive - Key Semantics, Lookup Models, and Failure Modes

16 min

Deep dive into Java Map semantics: key ownership, lookup contracts, implementation trade-offs, views, compute/merge APIs, null handling, ordering, and production failure modes.

Queue and Deque - Worklists, Buffers, and Traversal Semantics

11 min

Deep dive into Java Queue and Deque semantics: worklists, buffers, stack replacement, insertion/extraction/inspection methods, ArrayDeque vs LinkedList, PriorityQueue, and production failure modes.

Sequenced Collections Java 21+ - First, Last, Reverse, Encounter Order

13 min

Deep dive into Java 21+ SequencedCollection, SequencedSet, and SequencedMap: encounter order, first/last operations, reversed views, API design, and production failure modes.

Immutable, Unmodifiable, Fixed-Size, and Defensive Collections

13 min

Deep dive into immutable, unmodifiable, fixed-size, shallow, snapshot, live view, and defensive collection boundaries in modern Java.

Views, Wrappers, and Backed Collections

16 min

Deep dive into views, wrappers, backed collections, live views, snapshots, mutation propagation, memory retention, and API boundary design in modern Java.

Iterable and Iterator: The Traversal Contract

14 min

Deep dive into Iterable and Iterator as traversal contracts, state machines, enhanced-for desugaring, mutation rules, ordering, and API design in modern Java.

Fail-Fast, Weakly Consistent, Snapshot, and Concurrent Iteration Semantics

19 min

Deep dive into Java iteration consistency models: fail-fast, snapshot, weakly consistent, backed views, structural modification, safe mutation, and production debugging.

ListIterator and Bidirectional Traversal

15 min

Deep dive into ListIterator, bidirectional traversal, cursor position, mutation operations, index semantics, failure modes, and production refactoring patterns.

Spliterator: The Bridge Between Collections and Streams

18 min

Deep dive into Spliterator as the bridge between Collections and Streams, including traversal, splitting, characteristics, sizing, ordering, late binding, custom implementations, and production correctness.

Stream Mental Model: Source, Pipeline, Laziness, Terminal Execution

16 min

Deep dive into the Java Stream mental model: source, lazy pipeline, intermediate operations, terminal execution, encounter order, single-use streams, non-interference, statelessness, short-circuiting, debugging, and production decision-making.

Stream Operations Deep Dive: Map, Filter, FlatMap, Peek, Distinct, Sorted

14 min

Deep dive into Java Stream intermediate operations: map, filter, flatMap, mapMulti, peek, distinct, sorted, limit, skip, takeWhile, dropWhile, operation taxonomy, ordering cost, statefulness, side effects, and production failure modes.

Terminal Operations: Reduction, Matching, Finding, Counting, Materializing

13 min

Deep dive into Java Stream terminal operations: forEach, forEachOrdered, reduce, collect, toList, toArray, count, min, max, match, find, Optional handling, materialization, reduction correctness, and production selection rules.

Primitive Streams: IntStream, LongStream, DoubleStream

11 min

Deep dive into Java primitive streams: IntStream, LongStream, DoubleStream, boxing avoidance, numeric aggregation, ranges, arrays, statistics, precision boundaries, object-stream bridges, and production selection rules.

Collectors Deep Dive: Grouping, Partitioning, Mapping, Reducing

11 min

Deep dive into Java Collectors: mutable reduction, collector anatomy, toList, toSet, toMap, groupingBy, partitioningBy, mapping, filtering, flatMapping, reducing, summarizing, teeing, ordering, map suppliers, merge policies, and production failure modes.

Custom Collectors: Correctness, Associativity, and Parallel Safety

12 min

Deep dive into custom Java Collectors: collector laws, identity, associativity, combiner correctness, finisher semantics, characteristics, thread confinement, parallel safety, testing strategies, and production failure modeling.

Stream Gatherers Java 24+: Custom Intermediate Operations

11 min

Deep dive into Java Stream Gatherers introduced as a final feature in Java 24: custom intermediate operations, windowing, fold, scan, mapConcurrent, gatherer anatomy, state, downstream, parallelization constraints, and production design guidance.

Stream Performance Model: Allocation, Boxing, Fusion, Ordering, Short-Circuiting

11 min

Deep dive into Java Stream performance: allocation, boxing, pipeline fusion, ordering, stateful operations, short-circuiting, source quality, materialization, benchmarking, and production decision rules.

Parallel Streams: Correct Use, Wrong Use, and Production Constraints

10 min

Production-grade guide to Java parallel streams: execution model, splitting, associativity, ordering, shared state, blocking, common pool concerns, benchmark discipline, and decision rules.

Collection and Stream API Design for Enterprise Systems

18 min

API design for enterprise Java systems using arrays, collections, iterable, stream, and defensive boundaries.

Production Patterns: Transform, Index, Group, Diff, Merge, Validate

12 min

Production-grade Java collection and stream patterns for transform, indexing, grouping, diffing, merging, and validation.

Failure Modeling: Bugs Caused by Collections and Streams

12 min

A production failure-modeling handbook for bugs caused by Java arrays, collections, iterators, spliterators, and streams.

Capstone: Designing a Production-Grade In-Memory Processing Module

11 min

Capstone project for designing a production-grade in-memory processing module using Java arrays, collections, iterators, streams, collectors, and defensive API contracts.