Java SE 11 Programming Complete — Lesson 2: Generics, Collections, Lambdas, and Streams

Technical Scope

• generic classes, methods, bounds, and wildcards
• List, Set, Map, Queue, ordering, and comparators
• functional interfaces, method references, and lambdas
• streams, collectors, reduction, Optional, and parallel awareness

Instructor Demonstration

Demonstrate generic classes, methods, bounds, and wildcards inside a modular inventory service implemented, tested, profiled, and persisted through JDBC, then capture the exact configuration, command, transaction, report, or code evidence that proves the result.

Applied Workshop

Implement a controlled workshop covering List, Set, Map, Queue, ordering, and comparators and functional interfaces, method references, and lambdas, then test a failure or exception involving streams, collectors, reduction, Optional, and parallel awareness.

1. Confirm environment, identity, data, dependencies, and expected result.
2. Complete the product-specific implementation or analysis.
3. Capture commands, configuration, output, logs, transactions, or reports.
4. Explain the operational, security, performance, or business trade-off.

Validation Standard

The Generics, Collections, Lambdas, and Streams result must be reproducible, traceable to approved inputs, and consistent with the expected Oracle product behavior.

• The intended target and ownership are verified.
• The result is supported by reproducible evidence.
• Security, performance, reliability, and support impact are reviewed.
• Unexpected behavior is investigated before acceptance.

Failure Analysis

Diagnose issues in generic classes, methods, bounds, and wildcards, List, Set, Map, Queue, ordering, and comparators, functional interfaces, method references, and lambdas, or streams, collectors, reduction, Optional, and parallel awareness without making an unverified production change.

Learners isolate the smallest proven cause, apply a reversible correction, rerun validation, and record the preventive action.