Mastering Java String Algorithms: Substrings and Palindromes

After years of Java, I finally tried Python.  Honestly? I didn't expect to enjoy it this much. No semicolons. No curly braces. No type declarations. Just... clean, readable code that almost reads like English. As a Java developer, some things caught me off guard: → Returning multiple values without creating a class → List comprehensions replacing 5 lines with 1 → Decorators that actually execute code (unlike Java annotations) → Context managers that feel conversational I wrote about my first impressions — the good, the surprising, and where I still trust Java more. If you're a Java developer curious about Python, this one's for you. #Python #Java #SoftwareDevelopment #Programming #LearningInPublic

🚀 Just wrapped up an intensive Java OOP deep-dive session! Here’s what we covered today on method overloading vs. overriding, polymorphism, and abstraction: 🔍 Key Concepts Discussed: Method Overloading: Same method name, different parameters, within the same class. No inheritance needed. Method Overriding: Same method name and parameters, but in different classes (parent-child). Requires inheritance. Polymorphism: Achieved via method overriding, enabling "one interface, multiple implementations." Explored runtime polymorphism (dynamic binding) vs. compile-time polymorphism (static binding). Abstraction: Hiding implementation details while exposing essential features using abstract classes/methods. 💡 Why It Matters: Understanding these pillars—Encapsulation, Inheritance, Polymorphism, and Abstraction—is crucial for writing clean, scalable Java code. They form the foundation of robust OOP design and are frequently tested in interviews. 🎯 Pro Tip: When asked about polymorphism in interviews, go beyond "many forms." Explain with examples, cover loose/tight coupling, and discuss real-world applications (like the permit method in our airport example). 📚 Next Up: Interfaces and pure abstraction! Looking forward to diving deeper tomorrow. #Java #OOP #Programming #SoftwareDevelopment #Coding #LearnInPublic #TechSkills #Abstraction #Polymorphism TAP Academy

Day 43-Understanding Runtime Polymorphism in Java If compile-time polymorphism is about decisions made early, runtime polymorphism is where things get interesting — decisions are made while the program is running. What is Runtime Polymorphism? Runtime polymorphism is the ability of a program to decide which method to execute at runtime based on the object. It is achieved using method overriding. 🔹 Simple Idea: Same method name, same parameters… but different behavior depending on the object. 🔹 Example: class Card { void swipe() { System.out.println("Please wait..."); } } class CreditCard extends Card { void swipe() { System.out.println("Payment via Credit Card"); } } class DebitCard extends Card { void swipe() { System.out.println("Payment via Debit Card"); } } public class Main { public static void main(String[] args) { Card c; c = new CreditCard(); c.swipe(); // Credit Card method c = new DebitCard(); c.swipe(); // Debit Card method } } 🔹 What’s happening here? - The reference type is Card - But the object changes (CreditCard / DebitCard) - JVM decides which method to call at runtime 🔹 Key Points: ✔ Happens at runtime (execution time) ✔ Achieved using method overriding ✔ Also called Dynamic Binding / Late Binding ✔ JVM decides method execution based on actual object This is what makes Java powerful and flexible in real-world applications. #Java #OOP #Polymorphism #CodingJourney #ProgrammingBasics

Switching from Python to Java: Coming from a Python-heavy background, working with Java has been a real shift in perspective. In Python, a lot is taken care of for you through powerful high-level abstractions. You can move quickly, write less code, and focus on solving problems. But Java? It makes you slow down in a good way. You start paying attention to details you might have overlooked before: type definitions, structure, and the mechanics behind what your code is actually doing. It demands more explicitness, more discipline, and a deeper level of understanding. And that’s the beauty of it. Different languages, different strengths, but stepping outside your comfort zone is where real growth happens. https://lnkd.in/deNbabM5 #Java #Python #SoftwareEngineering #CodingJourney #LearningToCode

🚀 Day 22 of Learning Java 📘 Built-in Methods in Strings Today, I explored some important String methods in Java that make text manipulation easier and more efficient. 🔹 Key Methods Covered: ✔️ "length()" – Returns the length of the string ✔️ "charAt(index)" – Returns character at given index ✔️ "toLowerCase()" – Converts string to lowercase ✔️ "toUpperCase()" – Converts string to uppercase ✔️ "indexOf()" – Finds first occurrence of a character ✔️ "lastIndexOf()" – Finds last occurrence of a character ✔️ "startsWith()" – Checks starting characters ✔️ "endsWith()" – Checks ending characters ✔️ "equals()" – Compares two strings (case-sensitive) ✔️ "equalsIgnoreCase()" – Compares without case sensitivity ✔️ "replace()" – Replaces characters in string ✔️ "substring()" – Extracts part of string ✔️ "split()" – Splits string into array ✔️ "trim()" – Removes extra spaces ✔️ "compareTo()" – Compares strings lexicographically 💻 Example Code: String s = "TapAcademy"; System.out.println(s.length()); System.out.println(s.charAt(3)); System.out.println(s.toUpperCase()); System.out.println(s.toLowerCase()); System.out.println(s.indexOf('A')); System.out.println(s.substring(3,7)); 🎯 What I Learned: ✨ Strings are immutable in Java ✨ Built-in methods simplify coding ✨ Very useful for real-world applications #Java #CodingJourney #100DaysOfCode #Programming #Learning #JavaDeveloper #Tech

𝐂𝐚𝐧 𝐰𝐞 𝐨𝐯𝐞𝐫𝐫𝐢𝐝𝐞 𝐭𝐡𝐞 "𝐦𝐚𝐢𝐧()" 𝐦𝐞𝐭𝐡𝐨𝐝 𝐢𝐧 𝐉𝐚𝐯𝐚? In my previous post, we discussed that the "main()" method is static. No — we cannot override the "main()" method Why ? Because "main()" is static. And we cannot override static methods And in Java: 📃Overriding happens at runtime ⏱️ 📃 It depends on objects 👤 But ❌ Static methods belong to the class ❌ They are loaded during class loading time (before objects are created) 🔍𝐖𝐡𝐚𝐭 𝐚𝐜𝐭𝐮𝐚𝐥𝐥𝐲 𝐡𝐚𝐩𝐩𝐞𝐧𝐬 𝐭𝐡𝐞𝐧? You can write a main() method in a child class ❌ But it does not override the parent’s main(). It’s called "𝐌𝐞𝐭𝐡𝐨𝐝 𝐇𝐢𝐝𝐢𝐧𝐠". 𝐜𝐥𝐚𝐬𝐬 𝐏𝐚𝐫𝐞𝐧𝐭 { 𝐩𝐮𝐛𝐥𝐢𝐜 𝐬𝐭𝐚𝐭𝐢𝐜 𝐯𝐨𝐢𝐝 𝐦𝐚𝐢𝐧(𝐒𝐭𝐫𝐢𝐧𝐠[] 𝐚𝐫𝐠𝐬) { 𝐒𝐲𝐬𝐭𝐞𝐦.𝐨𝐮𝐭.𝐩𝐫𝐢𝐧𝐭𝐥𝐧("𝐏𝐚𝐫𝐞𝐧𝐭 𝐦𝐚𝐢𝐧"); } } 𝐜𝐥𝐚𝐬𝐬 𝐂𝐡𝐢𝐥𝐝 𝐞𝐱𝐭𝐞𝐧𝐝𝐬 𝐏𝐚𝐫𝐞𝐧𝐭 { 𝐩𝐮𝐛𝐥𝐢𝐜 𝐬𝐭𝐚𝐭𝐢𝐜 𝐯𝐨𝐢𝐝 𝐦𝐚𝐢𝐧(𝐒𝐭𝐫𝐢𝐧𝐠[] 𝐚𝐫𝐠𝐬) { 𝐒𝐲𝐬𝐭𝐞𝐦.𝐨𝐮𝐭.𝐩𝐫𝐢𝐧𝐭𝐥𝐧("𝐂𝐡𝐢𝐥𝐝 𝐦𝐚𝐢𝐧"); } } 𝐩𝐮𝐛𝐥𝐢𝐜 𝐜𝐥𝐚𝐬𝐬 𝐃𝐞𝐦𝐨 { 𝐩𝐮𝐛𝐥𝐢𝐜 𝐬𝐭𝐚𝐭𝐢𝐜 𝐯𝐨𝐢𝐝 𝐦𝐚𝐢𝐧(𝐒𝐭𝐫𝐢𝐧𝐠[] 𝐚𝐫𝐠𝐬) { 𝐏𝐚𝐫𝐞𝐧𝐭 𝐩 = 𝐧𝐞𝐰 𝐂𝐡𝐢𝐥𝐝(); 𝐩.𝐦𝐚𝐢𝐧(𝐚𝐫𝐠𝐬); // 𝐜𝐚𝐥𝐥𝐬 𝐏𝐚𝐫𝐞𝐧𝐭 𝐦𝐚𝐢𝐧 𝐂𝐡𝐢𝐥𝐝.𝐦𝐚𝐢𝐧(𝐚𝐫𝐠𝐬); // 𝐜𝐚𝐥𝐥𝐬 𝐂𝐡𝐢𝐥𝐝 𝐦𝐚𝐢𝐧 } } Output : Parent main Child main ♟️These main() methods are not called automatically by the JVM — they run only when we explicitly invoke them. ♟️Only main(String[] args) is invoked automatically by JVM. Other overloaded or hidden main() methods are executed only when explicitly called. 🚀 𝐅𝐢𝐧𝐚𝐥 𝐓𝐚𝐤𝐞𝐚𝐰𝐚𝐲 "main()" method cannot be overridden because it is static — it can only be hidden #Java #JavaDeveloper #JavaBackend #Programming #TechJourney #LearnBySharing #JavaConcepts #OOP #InterviewPrep

Python vs Java — It’s not just syntax, it’s how they THINK Most beginners compare these two based on ease or popularity… But the real difference lies in how your code actually runs behind the scenes. 🔹 Python → Interpreted, flexible, fast to build 🔹 Java → Compiled + JVM, structured, performance-focused 👉 Python converts code to bytecode and executes it via an interpreter 👉 Java compiles first, then runs on JVM with JIT optimization Same goal. Different journey. 💡 So the real question isn’t “Which is better?” It’s “Which one fits your use case?” – Want quick development & AI/ML? → Python – Building scalable systems & apps? → Java 🎯 Smart developers don’t pick sides. They pick the right tool. 🚀 Follow Skillected for more real-world tech breakdowns 💬 Comment below: Python or Java — what’s your pick and why?

“I memorized OOP concepts for months… but couldn’t use them in real code.” Hello 👋🏻 When I first learned Java, I thought understanding syntax was enough. But when I tried to build something on my own… I got stuck. That’s when I realized — 👉 The real power of Java lies in OOP concepts At first, everything felt confusing: Encapsulation, Inheritance, Polymorphism, Abstraction… I used to just memorize definitions for exams and interviews 😅 But once I started understanding them with real examples, everything changed. 👉 I could actually think like a developer 👉 I started writing cleaner and reusable code So I decided to break it down in the simplest way possible. 📌 I’ve explained OOP concepts in Java with practical examples here: https://lnkd.in/gGGZfx4c If you're learning Java or preparing for interviews, this might help you 🤝 This is part of my Core Java series — documenting my learning step by step 🚀 #Java #OOP #Programming #BackendDevelopment #LearningInPublic

--->> Understanding Inheritance in Java & Its Types **Inheritance is a fundamental concept in Object-Oriented Programming (OOP) that allows one class to acquire the properties and behaviors of another class. √ What is Inheritance? It is the process where a child class inherits variables and methods from a parent class using the extends keyword. ~Why is it Important? ✔️ Code reusability ✔️ Reduced development time ✔️ Better maintainability ✔️ Cleaner and scalable design @ Types of Inheritance in Java 1️⃣ Single Inheritance 2️⃣ Multilevel Inheritance 3️⃣ Hierarchical Inheritance 4️⃣ Hybrid (combination of types) # Important Notes 🔸 Java does NOT support multiple inheritance using classes ➡️ Because of the Diamond Problem (ambiguity in method resolution) 🔸 Cyclic inheritance is not allowed ➡️ Prevents infinite loops in class relationships 💻 Code Example (Single Inheritance) Java class Parent { void show() { System.out.println("This is Parent class"); } } class Child extends Parent { void display() { System.out.println("This is Child class"); } } public class Main { public static void main(String[] args) { Child obj = new Child(); obj.show(); // inherited method obj.display(); // child method } } 👉 Here, the Child class inherits the show() method from the Parent class. -->> Real-World Example Think of a Vehicle system 🚗 Parent: Vehicle Child: Car, Bike All vehicles share common features like speed and fuel, but each has its own unique behavior. @ Key Takeaway Inheritance helps you avoid code duplication and build efficient, reusable, and scalable application TAP Academy #Java #OOP #Inheritance #Programming #JavaDeveloper #Coding #SoftwareDevelopment #LearnJava

Embabel treats LLMs as participants in strongly typed workflows — not black boxes — and the Spring creator Rod Johnson spring says that gives Java developers an edge Python can't match. By Darryl Taft