(Note: The Map interface is also part of the framework but does not inherit from the Collection root interface. It maps unique keys to values, implemented by classes like HashMap and TreeMap .) Key Differences at a Glance LinkedList Resizable Array Doubly Linked List Balanced Tree Duplicates Not Allowed Not Allowed Insertion Order Sorted (Natural/Custom) Best Used For Fast retrieval ( O(1) ) Frequent insert/delete Quick unique checks Sorted unique tracking 6. Advanced Core Modules
Java reserves 50 keywords (like strictfp , transient , volatile ) and 3 literals ( true , false , null ). Data Types and Literals
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Stores all created objects and their instance variables. This is the primary target for Garbage Collection.
| | Detailed Topics Covered | | :--- | :--- | | 1. Introduction & Setup | Java History, Features, Naming Conventions, Installation, Environment Setup (Path/Classpath), and writing your first Java program. | | 2. Language Fundamentals | Identifiers, Reserved Words, Data Types, Literals, Arrays, Types of Variables ( static , instance , local ), Var-Arg methods, Main method, Command-line arguments, and Java Coding Standards. | | 3. Operators & Control Flow | All types of operators (arithmetic, relational, logical, bitwise, etc.) and all flow-control statements (if-else, switch, loops, break, continue). | | 4. Object-Oriented Programming (OOPs) | This is the heart of the notes, covering: Class & Object, Constructors, this & super keywords, static , final , enum , Inheritance, Polymorphism (Method Overloading/Overriding), Abstraction (Abstract Classes & Interfaces), Type Casting, Object Cloning, and Java 8 features in interfaces. | | 5. Advanced Core Concepts | Inner Classes (Member, Static, Method-local, Anonymous), Wrapper Classes, Packages, JAR files creation, Exception Handling ( try-catch-finally , throw , throws , custom exceptions), Multi-Threading (Thread lifecycle, synchronization, inter-thread communication), and I/O Streams. | | 6. Key APIs & Utilities | String Handling ( String , StringBuffer , StringBuilder ), Collections Framework, and Garbage Collection concepts. |