Welcome to the Complete Java Full Course 2026. This structured Java tutorial series is designed to take you from absolute beginner to advanced level in Java programming. In this playlist, you will learn: • Java Basics • Variables & Data Types • OOP Concepts (Encapsulation, Inheritance, Polymorphism, Abstraction) • Constructors & Methods • Static & Non-static concepts • Memory Management in Java • Collections Framework • Exception Handling • Multithreading • Java for Placements & Interviews This course is perfect for: College students Beginners starting programming Placement preparation Software engineering interviews DSA preparation Anyone who wants strong Java fundamentals Each lecture is structured step-by-step with deep conceptual clarity and practical examples. Start from Lecture 1 and follow the playlist in sequence for best results. Subscribe and stay consistent. Java mastery requires structured learning. Github Link for Notes & Code : https://github.com/adityatandon15/Java-Full-Course java full course 2026, java tutorial for beginners, learn java step by step, complete java course, java programming course, java for placements, java interview preparation, java beginner to advanced, java dsa preparation, java oops concepts, java fundamentals, java basics to advanced
Curated by: Coder Army (57 videos)
In this video, we dive deep into the Java Optional class, one of the most important concepts introduced in Java 8 to handle null values safely and effectively. If you’ve ever struggled with NullPointerException or messy null checks, this video will completely change how you think about handling missing values in Java. What you will learn in this video: Why null is problematic in Java What is Optional and why it was introduced How Optional works internally (clear mental model) All important Optional methods explained in depth: - get() - isPresent() - ifPresent() - orElse() - orElseGet() - orElseThrow() - ifPresentOrElse() Optional transformations (MOST IMPORTANT): - map() - flatMap() - filter() Combining Optional with Streams (real-world usage) Best practices & common mistakes (interview-focused) After watching this video, you’ll be able to: Replace null checks with clean Optional code Use Optional with Streams confidently Write production-level Java code Why Learn Java? Java is one of the most powerful and widely used programming languages in the world. It is used in: Backend development Enterprise applications Android development Banking systems Large-scale distributed systems If you want to master Data Structures, Spring Boot, Microservices, or System Design, Java fundamentals are essential. Join Coder Army Whatsapp Group: https://whatsapp.com/channel/0029Va6H0tbHVvTbcuT99Y1f Join System Design Whatsapp Group: https://whatsapp.com/channel/0029VbBF1XKF1YlMyYuPM23s Code and Notes: Github : https://github.com/adityatandon15/Java-Full-Course We offer paid course on Dsa, web development, blockchain, system design and GenAI. Join our Paid Course: https://strikes.in/ Coder Army: https://coderarmy.in/#home Coder Army app: https://play.google.com/store/apps/details?id=com.rohit.negi Connect with Aditya Tandon Instagram : https://www.instagram.com/adityatandon2 LinkedIn : https://www.linkedin.com/in/adityatandon2 Twitter : https://x.com/adityatandon02 Timestamps: java optional optional class java java optional tutorial java optional explained optional map flatmap java optional vs null java java 8 optional optional with streams java streams optional optional methods java learn java optional java interview questions optional null pointer exception java functional programming java java full course