Nayankumar Dhome’s Post

𝐃𝐀𝐘 18 : 𝐀𝐧 𝐈𝐧𝐭𝐞𝐫𝐞𝐬𝐭𝐢𝐧𝐠 𝐅𝐚𝐜𝐭 𝐀𝐛𝐨𝐮𝐭 𝐉𝐚𝐯𝐚 🔥🧐 🌟 𝐃𝐢𝐯𝐞 𝐈𝐧𝐭𝐨 𝐋𝐚𝐦𝐛𝐝𝐚 𝐄𝐱𝐩𝐫𝐞𝐬𝐬𝐢𝐨𝐧𝐬 𝐢𝐧 𝐉𝐚𝐯𝐚! 🌟 Lambda expressions, introduced in Java 8, They enable developers to write functional-style programming by treating functions as arguments, making code concise, readable, and more expressive. 📌 𝐖𝐡𝐚𝐭 𝐀𝐫𝐞 𝐋𝐚𝐦𝐛𝐝𝐚 𝐄𝐱𝐩𝐫𝐞𝐬𝐬𝐢𝐨𝐧𝐬? A lambda expression is essentially an anonymous function — a block of code that can be passed around and executed later. It provides a way to implement functional interfaces (interfaces with a single abstract method) with clean and concise syntax. Syntax: (𝑝𝑎𝑟𝑎𝑚𝑒𝑡𝑒𝑟𝑠) -> 𝑒𝑥𝑝𝑟𝑒𝑠𝑠𝑖𝑜𝑛 𝑜𝑟 (𝑝𝑎𝑟𝑎𝑚𝑒𝑡𝑒𝑟𝑠) -> { 𝑠𝑡𝑎𝑡𝑒𝑚𝑒𝑛𝑡𝑠; } Parameters: Input values, similar to method arguments. Arrow Operator (->): Separates the parameter(s) from the body. Body: The code that gets executed, which can be a single expression or a block of statements. 💡 𝐓𝐲𝐩𝐞𝐬 𝐨𝐟 𝐋𝐚𝐦𝐛𝐝𝐚 𝐄𝐱𝐩𝐫𝐞𝐬𝐬𝐢𝐨𝐧𝐬 ✅ 𝐍𝐨 𝐏𝐚𝐫𝐚𝐦𝐞𝐭𝐞𝐫𝐬: () -> 𝑆𝑦𝑠𝑡𝑒𝑚.𝑜𝑢𝑡.𝑝𝑟𝑖𝑛𝑡𝑙𝑛("𝐻𝑒𝑙𝑙𝑜, 𝐿𝑎𝑚𝑏𝑑𝑎!") ✅ 𝐎𝐧𝐞 𝐏𝐚𝐫𝐚𝐦𝐞𝐭𝐞𝐫: 𝑛𝑎𝑚𝑒 -> 𝑆𝑦𝑠𝑡𝑒𝑚.𝑜𝑢𝑡.𝑝𝑟𝑖𝑛𝑡𝑙𝑛(𝑛𝑎𝑚𝑒) ✅ 𝐌𝐮𝐥𝐭𝐢𝐩𝐥𝐞 𝐏𝐚𝐫𝐚𝐦𝐞𝐭𝐞𝐫𝐬: (𝑎, 𝑏) -> 𝑎 + 𝑏 🌟 𝐖𝐡𝐲 𝐔𝐬𝐞 𝐋𝐚𝐦𝐛𝐝𝐚 𝐄𝐱𝐩𝐫𝐞𝐬𝐬𝐢𝐨𝐧𝐬? Conciseness: Reduces boilerplate code and improves readability. Flexibility: Enables functional-style programming. Reusability: Pass functionality around as data. Performance: Works seamlessly with the Stream API for parallel processing. 🎯 𝐂𝐨𝐧𝐜𝐥𝐮𝐬𝐢𝐨𝐧 Lambda expressions have transformed how Java developers write code. They simplify tasks like sorting, filtering, and processing collections, all while making the code more readable and maintainable. Embracing lambda expressions allows you to fully leverage Java’s powerful functional programming features. 🔗𝗟𝗲𝘁’𝘀 𝗖𝗼𝗻𝗻𝗲𝗰𝘁! 𝗙𝗼𝘂𝗻𝗱 𝘁𝗵𝗶𝘀 𝗵𝗲𝗹𝗽𝗳𝘂𝗹? 𝗛𝗶𝘁 𝘁𝗵𝗲 ❤️ 𝗮𝗻𝗱 𝘀𝗵𝗮𝗿𝗲 𝘄𝗶𝘁𝗵 𝘆𝗼𝘂𝗿 𝗻𝗲𝘁𝘄𝗼𝗿𝗸! 🚀 #Java #LambdaExpressions #FunctionalProgramming #Java8 #Coding

🚀 𝐃𝐚𝐲 𝟏𝟗: 𝐀𝐧𝐨𝐧𝐲𝐦𝐨𝐮𝐬 𝐂𝐥𝐚𝐬𝐬𝐞𝐬 - 𝐃𝐲𝐧𝐚𝐦𝐢𝐜 𝐂𝐨𝐝𝐢𝐧𝐠 𝐌𝐚𝐝𝐞 𝐄𝐚𝐬𝐲 🎯 𝐓𝐨𝐝𝐚𝐲'𝐬 𝐓𝐨𝐩𝐢𝐜: Anonymous Classes In Java, Anonymous Classes are inner classes defined without a name, created for quick, single-use implementations. They simplify code when creating short-lived objects for abstract classes or interfaces. ✨ 𝐂𝐨𝐧𝐜𝐞𝐩𝐭𝐬 𝐂𝐨𝐯𝐞𝐫𝐞𝐝: 1️⃣ 𝐖𝐡𝐚𝐭 𝐚𝐫𝐞 𝐀𝐧𝐨𝐧𝐲𝐦𝐨𝐮𝐬 𝐂𝐥𝐚𝐬𝐬𝐞𝐬? Special inner classes with no name. Defined inline during object creation. Often used for event handling or short, concise implementations. 2️⃣ 𝐒𝐲𝐧𝐭𝐚𝐱: Interface obj = new Interface() { @Override public void method() { System.out.println("Anonymous class method implementation!"); } }; 3️⃣ 𝐔𝐬𝐚𝐠𝐞: Abstract Classes: Provide quick implementations for abstract methods. Interfaces: Implement methods inline for one-time use. 🌟 𝐁𝐞𝐧𝐞𝐟𝐢𝐭𝐬 𝐨𝐟 𝐀𝐧𝐨𝐧𝐲𝐦𝐨𝐮𝐬 𝐂𝐥𝐚𝐬𝐬𝐞𝐬: 1️⃣ Eliminate the need for separate class files for short-lived functionality. 2️⃣ Keep code concise and focused. 3️⃣ Access variables of the enclosing class. 💡 𝐓𝐢𝐩𝐬 𝐟𝐨𝐫 𝐏𝐫𝐚𝐜𝐭𝐢𝐜𝐞: 1️⃣ Implement an interface using an anonymous class. 2️⃣ Override methods of an abstract class on the fly. 3️⃣ Use them for quick event handling in GUIs. 🎙️ 𝐈𝐧𝐭𝐞𝐫𝐯𝐢𝐞𝐰 𝐓𝐢𝐩𝐬: 1️⃣ Be prepared to explain the syntax and purpose of anonymous classes. 2️⃣ Understand the scope and lifecycle of these classes. 3️⃣ Compare anonymous classes with lambda expressions in Java 8+. 🌟 Anonymous classes simplify coding for single-use scenarios, enabling you to write efficient and concise Java programs. Master them to elevate your Java expertise! 💪 #JavaChallenge #100DaysOfJava #AnonymousClasses #LearnJava #JavaOOP #Day19Java #CodeEveryday #ProgrammingMotivation #BackendDeveloper #JavaLearners

🚀 𝐃𝐚𝐲 𝟑𝟐: 𝐋𝐚𝐦𝐛𝐝𝐚𝐬 - 𝐏𝐨𝐰𝐞𝐫𝐢𝐧𝐠 𝐅𝐮𝐧𝐜𝐭𝐢𝐨𝐧𝐚𝐥 𝐏𝐫𝐨𝐠𝐫𝐚𝐦𝐦𝐢𝐧𝐠 🎯 𝐓𝐨𝐝𝐚𝐲'𝐬 𝐓𝐨𝐩𝐢𝐜: Lambdas in Java Lambdas are a cornerstone of functional programming in Java, introduced in Java 8. They simplify code, making it more concise and expressive. ✨ 𝐂𝐨𝐧𝐜𝐞𝐩𝐭𝐬 𝐂𝐨𝐯𝐞𝐫𝐞𝐝: 1️⃣ 𝐃𝐞𝐟𝐢𝐧𝐢𝐭𝐢𝐨𝐧: A lambda expression is an anonymous function that can be used to implement functional interfaces. It eliminates the need for verbose anonymous inner classes. 2️⃣ 𝐒𝐲𝐧𝐭𝐚𝐱: (parameters) -> expression or (parameters) -> {statements} Examples: (x, y) -> x + y str -> System.out.println(str) 3️⃣ 𝐊𝐞𝐲 𝐅𝐞𝐚𝐭𝐮𝐫𝐞𝐬: Conciseness: Reduces boilerplate code. Readability: Code is easier to understand. Flexibility: Works seamlessly with functional interfaces like Runnable, Callable, Comparator, etc. 4️⃣ 𝐔𝐬𝐞 𝐂𝐚𝐬𝐞𝐬: Sorting collections using Comparator. Performing actions with forEach in streams. Simplifying multi-threading with Runnable. 💡 𝐓𝐢𝐩𝐬 𝐟𝐨𝐫 𝐏𝐫𝐚𝐜𝐭𝐢𝐜𝐞: 1️⃣ Use lambdas to simplify operations on collections. 2️⃣ Experiment with different functional interfaces to understand how lambdas integrate. 3️⃣ Learn how type inference works with lambdas. 🎙️ 𝐈𝐧𝐭𝐞𝐫𝐯𝐢𝐞𝐰 𝐓𝐢𝐩𝐬: 1️⃣ Be prepared to explain the advantages of using lambdas. 2️⃣ Know how lambdas work with streams and functional interfaces. 3️⃣ Discuss scenarios where using lambdas can make code cleaner and more efficient. 🌟 𝐌𝐚𝐬𝐭𝐞𝐫 𝐥𝐚𝐦𝐛𝐝𝐚𝐬 𝐭𝐨 𝐭𝐚𝐤𝐞 𝐲𝐨𝐮𝐫 𝐉𝐚𝐯𝐚 𝐩𝐫𝐨𝐠𝐫𝐚𝐦𝐦𝐢𝐧𝐠 𝐭𝐨 𝐭𝐡𝐞 𝐧𝐞𝐱𝐭 𝐥𝐞𝐯𝐞𝐥! 🚀 #JavaChallenge #100DaysOfJava #LearnJava #Java8Features #Day32Java #LambdasInJava #CodeEveryday #ProgrammingMotivation #BackendDeveloper #JavaLearners

**Hey Coders! 👩💻👨💻** Yesterday, i gave a brief explanation of **Java 8 features**. Now, we will dive into each feature in detail, one by one, along with the syntax and examples. Stay tuned! 🚀 **Exploring Lambda Expressions in Java 8** Java 8 introduced Lambda Expressions, making code more readable and concise! With this powerful feature, we can express instances of single-method interfaces (functional interfaces) more compactly. 🔍 What is a Lambda Expression? A lambda expression is essentially a block of code that you can pass around to execute later, much like a method, but without all the boilerplate syntax. 📌 Syntax: (parameters) -> { expression or block of code } 📘 Example: // Traditional approach with an anonymous class Runnable r1 = new Runnable() { @Override public void run() { System.out.println("Hello, Lambda!"); } }; // Using Lambda Expression Runnable r2 = () -> System.out.println("Hello, Lambda!"); In the above example, we simplified the creation of the Runnable interface instance using a lambda expression. No need for an anonymous class! 🚀 💡 Why use Lambda Expressions? 1. Concise Code: Reduces the boilerplate code. 2. Functional Programming: Makes Java more functional. 3. Improved Readability: Less code, clearer intention. #Java8 #LambdaExpression #FunctionalProgramming #JavaDeveloper #CodeSimplified Let me know if you’d like to tweak this further!

🚀 Java Generics Simplified: extends vs super 🚀 If you're diving into Java Generics, understanding the difference between “? extends T” and “? super T” is key to mastering type safety and flexibility. Here’s a simple breakdown to clear things up!  🔹? extends T Think of “? extends T” as saying “I can work with T and any subclass of T.” 💡Best for reading: If you only need to read data, extends ensures that everything you retrieve is guaranteed to be at least of type T. - Example: List<? extends Number> lets you safely read Integer, Double, or Float — any subclass of Number. However, adding items isn't allowed since Java doesn’t know the exact type inside.  🔹? super T Now, “? super T” means “I can work with T and any superclass of T.” 💡 Best for writing: If your goal is to add elements, super lets you write items of type T or its subclasses. - Example: List<? super Integer> allows adding Integer items, as well as anything derived from Integer. But, reading gives you an Object type since Java isn’t sure of the exact type.  In short: - extends → for getting values (safe reads 🧐) - super → for putting values (safe writes 📝) Mastering extends and super makes Java generics so much more powerful and flexible! 💡 #Java #Generics #Coding #SoftwareEngineering #BackendDevelopment 

🌟 Day 22: Lambda Expressions & Functional Programming in Java 🌟 Java introduced Lambda Expressions to simplify functional programming, enabling more concise and readable code. Here's a look at how to use them: 1. Lambda Expression: A short way to implement a functional interface (an interface with one abstract method). Example: List<String> names = Arrays.asList("Alice", "Bob", "Charlie"); names.forEach(name -> System.out.println(name)); 2. Functional Programming: Using lambda expressions in operations like filtering, mapping, and reducing in collections. Example: List<Integer> numbers = Arrays.asList(1, 2, 3, 4); numbers.stream().filter(n -> n % 2 == 0).forEach(System.out::println); Lambda expressions are a game-changer for simplifying code and making it more expressive! How do you use lambdas in your projects? #Java #LambdaExpressions #FunctionalProgramming #Java8 #StreamAPI #JavaProgramming #LearnJava #SoftwareDevelopment #TechLearning #30DaysOfCode #Day22

 Lambda Expressions in Java: Unlocking the Power of Functional Programming 🚀 What Are Lambda Expressions? 🤔 A lambda expression is essentially an anonymous function — a block of code that can be passed around and executed. It enables you to treat functionality as a method argument or code as data. In simpler terms, lambda expressions let you write code in a functional style, which is especially useful for streamlining tasks like data manipulation and collection processing. Why Use Lambda Expressions? 🌟 1- Less Boilerplate Code: Say goodbye to lengthy anonymous inner classes. 2- Improved Readability: Express your intent clearly in fewer lines of code. 3- Functional Programming: Enables declarative coding, which is easier to parallelize. 4- Stream API Compatibility: Perfectly complements Java's Stream API for data processing. ** for more info: https://lnkd.in/djHvzp76 #Java #LambdaExpressions #FunctionalProgramming #Java8 #CodingTips

Exploring Java Versions from 17 to 21: Key Features and Enhancements Full blog at: https://lnkd.in/g8wKm3Xv As Java continues to evolve, each version brings significant improvements and features that enhance the development experience. important features introduced from Java 17 to Java 21. Java 17 (LTS) - Sealed Classes: Restrict which classes or interfaces can extend or implement them, providing more control over code architecture. - Pattern Matching for Switch (Preview): Simplifies complex data-oriented queries with more readable code. - Enhanced Pseudorandom Number Generators: New interfaces and implementations for random number generation. Java 18 - Simple Web Server: A minimal web server for prototyping and testing. - UTF-8 by Default: UTF-8 becomes the default charset for standard Java APIs. - Vector API (Second Incubator): Provides a mechanism to express vector computations for performance improvements. Java 19 - Virtual Threads (Preview): Part of Project Loom, allowing lightweight concurrency and simplified thread management. - Structured Concurrency (Incubator): Simplifies concurrent programming by treating multiple tasks running in different threads as a single unit of work. - Pattern Matching for Switch (Third Preview): Further enhancements to the switch statement for pattern matching. Java 20 - Scoped Values (Incubator): A new way to share immutable data within and across threads. - Record Patterns (Preview): Enhancements to the pattern matching capabilities introduced in earlier versions. - Foreign Function & Memory API (Third Preview): Provides Java programs access to native code and memory outside the Java heap. Java 21 - Sequenced Collections: New interfaces to represent collections with a defined encounter order. - Virtual Threads (Stable): Lightweight threads that dramatically simplify concurrency. - Pattern Matching for Switch (Stable):Officially integrated into the language after multiple previews. - String Templates: Simplifies the creation and processing of strings with embedded expressions. #Java #JavaDevelopment #SoftwareEngineering #Programming #TechUpdates #Java17to21

optional class in #java

𝐔𝐧𝐝𝐞𝐫𝐬𝐭𝐚𝐧𝐝𝐢𝐧𝐠 𝐃𝐢𝐚𝐦𝐨𝐧𝐝 𝐀𝐦𝐛𝐢𝐠𝐮𝐢𝐭𝐲 𝐢𝐧 𝐉𝐚𝐯𝐚 The 𝐃𝐢𝐚𝐦𝐨𝐧𝐝 𝐩𝐫𝐨𝐛𝐥𝐞𝐦 is a common issue in Object-Oriented Programming where a class inherits methods with the same name from multiple parents. This creates ambiguity—how does the program decide which method to use? 𝐉𝐚𝐯𝐚 𝐬𝐨𝐥𝐯𝐞𝐬 𝐭𝐡𝐢𝐬 𝐩𝐫𝐨𝐛𝐥𝐞𝐦 𝐢𝐧 𝐭𝐰𝐨 𝐰𝐚𝐲𝐬: 𝐍𝐨 𝐌𝐮𝐥𝐭𝐢𝐩𝐥𝐞 𝐈𝐧𝐡𝐞𝐫𝐢𝐭𝐚𝐧𝐜𝐞 𝐟𝐨𝐫 𝐂𝐥𝐚𝐬𝐬𝐞𝐬 Java doesn’t allow a class to inherit from more than one class. This eliminates the risk of ambiguity altogether when working with classes. 𝐄𝐱𝐩𝐥𝐢𝐜𝐢𝐭 𝐂𝐨𝐧𝐟𝐥𝐢𝐜𝐭 𝐑𝐞𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧 𝐟𝐨𝐫 𝐈𝐧𝐭𝐞𝐫𝐟𝐚𝐜𝐞𝐬 Java does allow a class to implement multiple interfaces, even if they have methods with the same name. However, if two interfaces have the same default method, Java forces the child class to resolve the conflict by overriding the method. Example Explained: Imagine this scenario: 𝑖𝑛𝑡𝑒𝑟𝑓𝑎𝑐𝑒 𝐴 {     𝑑𝑒𝑓𝑎𝑢𝑙𝑡 𝑣𝑜𝑖𝑑 𝑠ℎ𝑜𝑤() { 𝑆𝑦𝑠𝑡𝑒𝑚.𝑜𝑢𝑡.𝑝𝑟𝑖𝑛𝑡𝑙𝑛("𝐴'𝑠 𝑚𝑒𝑡ℎ𝑜𝑑"); }   }   𝑖𝑛𝑡𝑒𝑟𝑓𝑎𝑐𝑒 𝐵 {     𝑑𝑒𝑓𝑎𝑢𝑙𝑡 𝑣𝑜𝑖𝑑 𝑠ℎ𝑜𝑤() { 𝑆𝑦𝑠𝑡𝑒𝑚.𝑜𝑢𝑡.𝑝𝑟𝑖𝑛𝑡𝑙𝑛("𝐵'𝑠 𝑚𝑒𝑡ℎ𝑜𝑑"); }   }   𝑐𝑙𝑎𝑠𝑠 𝐶 𝑖𝑚𝑝𝑙𝑒𝑚𝑒𝑛𝑡𝑠 𝐴, 𝐵 {     @𝑂𝑣𝑒𝑟𝑟𝑖𝑑𝑒     𝑝𝑢𝑏𝑙𝑖𝑐 𝑣𝑜𝑖𝑑 𝑠ℎ𝑜𝑤() {   // 𝑅𝑒𝑠𝑜𝑙𝑣𝑒 𝑡ℎ𝑒 𝑐𝑜𝑛𝑓𝑙𝑖𝑐𝑡 𝑒𝑥𝑝𝑙𝑖𝑐𝑖𝑡𝑙𝑦     𝐴.𝑠𝑢𝑝𝑒𝑟.𝑠ℎ𝑜𝑤(); // 𝐶𝑎𝑙𝑙 𝐴'𝑠 𝑣𝑒𝑟𝑠𝑖𝑜𝑛 𝑜𝑓 𝑠ℎ𝑜𝑤()   }   } In this example: →    Both A and B have a show() method. →    Class C implements both interfaces, so Java asks you to explicitly decide which version to use. 𝐖𝐡𝐲 𝐢𝐬 𝐭𝐡𝐢𝐬 𝐢𝐦𝐩𝐨𝐫𝐭𝐚𝐧𝐭? →    It avoids unexpected behavior in your programs. →    It keeps your code clean and predictable. By enforcing clear conflict resolution, Java ensures your design remains robust and error-free. #Java #OOP #ProgrammingTips #SoftwareTesting #CleanCode #Inheritance #JavaDevelopment #TechEducation #CodeExamples #LearnJava