Java Collection means a single unit of objects. Java Collection framework provides many interfaces (Set, List, Queue, Deque) and classes (ArrayList, Vector, LinkedList, PriorityQueue, HashSet, LinkedHashSet, TreeSet).
A full-stack developer may manage the entire development cycle from the consumer interface to server-side and database interfaces because they are experts in each front-end and lower back-end technology.
Its main focus is to build such general applications. The J2SE (Java Standard Edition) is known as Core Java. It mainly covers concepts of object-oriented programming (OOP).
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✔️ Java Features & Architecture (JDK, JRE, JVM)
✔️ Data Types and Variables
✔️ Operators and Expressions
✔️ Control Flow Statements (if, else, switch, loops)
✔️ Classes and Objects
✔️ Constructors
✔️ Inheritance
✔️ Polymorphism (Method Overloading & Overriding)
✔️ Abstraction and Encapsulation
✔️ Access Modifiers (public, private, protected)
✔️ ‘this’ and ‘super’ Keywords
✔️ One-dimensional and Multi-dimensional Arrays
✔️ String, StringBuffer, and StringBuilder
✔️ String Methods and Memory Handling
✔️ try, catch, finally Blocks.
✔️ throw and throws Keywords.
✔️ Custom Exceptions.
✔️ Checked vs Unchecked Exceptions.
✔️ Autoboxing and Unboxing.
✔️ Primitive vs Wrapper.
✔️ Type Casting in Java.
✔️ Static Variables, Methods, and Blocks
✔️ Static vs Non-static Context
✔️ Built-in and User-defined Packages
✔️ Importing and Using Packages
✔️ List, Set, Map Interfaces
✔️ ArrayList, HashSet, HashMap
✔️ Iterators and Loops
✔️ Creating Threads (Thread & Runnable)
✔️ Thread Lifecycle and Synchronization
✔️ Reading and Writing Files
✔️ FileReader and FileWriter
✔️ BufferedReader and PrintWriter
