*☕ Java Programming A–Z: Key Concepts Every Developer Should Know* *A – Abstraction* Hiding complexity, showing only essentials using abstract classes or interfaces. *B – Break Statement* Used to exit loops or switch blocks early. *C – Class* Blueprint for creating objects, defining fields and methods. *D – Data Types* int, float, double, boolean, char, etc. *E – Encapsulation* Wrapping data and code together, restricting access via access modifiers. *F – For Loop* Used to execute a block repeatedly with a known count. *G – Garbage Collection* Automatic memory cleanup of unused objects. *H – HashMap* A key-value data structure in Java’s Collection Framework. *I – Inheritance* Allows a class to acquire properties of another class. *J – JVM (Java Virtual Machine)* Runs Java bytecode, ensuring platform independence. *K – Keywords* Reserved words like `class`, `static`, `public`, etc. *L – Lambda Expressions* Used to write functional-style code in a concise way. *M – Method Overloading* Defining multiple methods with the same name but different parameters. *N – NullPointerException* Common runtime error when accessing a null object. *O – Object-Oriented Programming* Java is built around OOP concepts like inheritance and polymorphism. *P – Polymorphism* One method behaving differently based on the object that calls it. *Q – Queue Interface* Used for FIFO data structures like LinkedList or PriorityQueue. *R – Recursion* A method calling itself to solve problems like factorial, Fibonacci, etc. *S – String Class* Immutable class used to store text data. *T – Try-Catch Block* Handles exceptions and errors during runtime. *U – Unary Operator* Operators like `++` and `--` used for increment/decrement. *V – Void Keyword* Specifies that a method does not return anything. *W – While Loop* Runs a block of code repeatedly as long as the condition is true. *X – XML Parsing* Java supports parsing XML using libraries like DOM, SAX. *Y – Yield (in Switch Expressions)* Introduced in newer versions to return a value from a switch case. *Z – Zip Streams* Combining multiple streams (Java 8 feature). 💡 *Master these terms to strengthen your Java foundations!* *React ❤️ for more*