Java Lambda Expressions: Syntax and Usage

Day 9 of my #JavaWithDSAChallenge Today’s topic: Java Exception Handling Problem: Given two integers a and b, find the minimum value of a $ b where $ can be any arithmetic operation (+, -, *, /). We also need to handle division by zero using Exception Handling in Java. Key Concepts: try-catch block to handle runtime errors gracefully Arithmetic operations and Math.min() for comparisons Handling invalid division cases safely Code Snippet: class Solution { public int findMin(int a, int b) { int add = a + b; int sub = a - b; int mul = a * b; int div = Integer.MAX_VALUE; try { div = a / b; } catch (ArithmeticException e) { // Division by zero handled } int min1 = Math.min(add, sub); int min2 = Math.min(mul, div); return Math.min(min1, min2); } } Example: Input: a = 5, b = -5 Output: -25 Explanation: Among (0, 10, -25, -1), the minimum is -25. Learning: Exception Handling is not just about catching errors - it’s about writing safe and reliable code that doesn’t break in unexpected situations. #Java #CodingChallenge #DSA #LearningInPublic #100DaysOfCode #WomenInTech #JavaDeveloper

🚀 String Manipulation (Java) Java's `String` class provides numerous methods for manipulating strings. Common operations include finding the length of a string using `length()`, concatenating strings using `+` or `concat()`, extracting substrings using `substring()`, and comparing strings using `equals()` or `equalsIgnoreCase()`. These methods allow developers to efficiently work with and process text data. Because strings are immutable, many manipulation methods return a *new* String object. #Java #JavaDev #OOP #Backend #professional #career #development

Today I’m sharing one of the most important Java concepts — Deep Copy vs Shallow Copy. When we copy objects in Java, it’s not always about duplicating data — sometimes we only copy references. This can cause unexpected behavior when one object changes and the other gets affected too. That’s where Deep Copy comes in! 💡 It creates a completely new object with its own copy of the data — ensuring changes in one object don’t impact the other. Here’s a simple example using HealthStatus and Character classes to show how Deep Copy keeps objects independent 👇 ✅ Output: The original object remains unchanged even after modifying the copy — a true Deep Copy! 💭 Deep Copy ensures data independence and prevents accidental side effects when working with objects containing references. #Java #Programming #OOP #DeepCopy #ShallowCopy #LearningJourney #CodeWithPavan #SoftwareDevelopment

☕ Day 12 of my “Java from Scratch” Series – “Relational Operators in Java”. When we want to compare two values or variables, we use Relational Operators in Java. These comparisons always give a boolean result — either true ✅ or false ❌. 🔹 List of Relational Operators 1. Equals (==) 2. Greater than (>) 3. Less than (<) 4. Greater than or equal to (>=) 5. Less than or equal to (<=) 6. Not equal to (!=) 📘 Example 1: int a = 5; int b = 5; if (a == b) { System.out.println("a and b are equal"); } ✅ Output: a and b are equal Because both a and b have the same value. 📘 Example 2: int a = 5; int b = 10; if (a >= b) { System.out.println("a is greater or equal to b"); } Result: ❌ This won’t print anything, because a is less than b, so the condition is false. 💡 In simple words: Relational operators help the program make decisions by comparing values. They are mainly used inside conditions (like if, while, etc.). 👉 Question for you: What will be the output of this code? 👇 int x = 7; int y = 10; System.out.println(x != y); (Comment your answer below ⬇️) #Java #Programming #Coding #JavaDeveloper #SoftwareEngineering #RelationalOperatorsInJava #Learning #Developers #JavaFromScratch #Tech #Technology #NeverGiveUp

*"Happy to share that I’ve learned about *Polymorphism in Java*! 🎉 Polymorphism allows *one interface to be used for multiple forms*, making code flexible and reusable. There are *two types*: 1. *Compile-time Polymorphism (Method Overloading)* – Same method name, different parameters. 2. *Runtime Polymorphism (Method Overriding)* – Subclass provides a specific implementation of a method defined in parent class. Excited to implement these concepts in real Java projects! 💻✨ #Java #OOP #Polymorphism #LearningJourney"*

The Java Collection Framework isn't just about data structures - it's about writing cleaner, more efficient, and scalable code. Here's a concise guide I've prepared to simplify its core concepts. Explore. Learn. Implement. #Java #JavaDeveloper #SpringBoot #Collections #LearningJourney #JavaDeveloperCommunity #InterviewPreparation #LearningTogether #TechCommunity

💡 Why Java is not 100% Object-Oriented? Even though Java is one of the most popular Object-Oriented Programming (OOP) languages, it’s not purely object-oriented. Here are the two key reasons why 👇 1️⃣ Primitive Data Types Java has 8 primitive data types (int, float, double, char, byte, short, long, boolean) — and they are not objects. 2️⃣ Static Methods & Variables Static members can be accessed without creating an object, which breaks the pure object-oriented principle. 🔹 In a fully object-oriented language, everything should be an object, but Java balances performance and OOP principles, making it a practical choice for development. #Java #OOP #ProgrammingConcepts #SpringBoot #Developers #LearningJava #TechCommunity

💡Constructor vs Method in Java 💻 Both look similar in syntax — but their purpose is totally different! This visual makes it crystal clear 👇 🟦 Constructor Used to initialize a new object. Same name as the class. No return type. Automatically invoked when an object is created. If not defined, Java provides a default constructor. 🟥 Method Used to perform actions or operations. Can have any name (not same as class). May return a value. Called explicitly when needed. No default method is provided by Java. ✨ Understanding this difference helps you design better, cleaner Java programs — and avoid those “why is my code not running?” moments 😅 #Java #OOP #ProgrammingBasics #LearningJava #Developers #CodingConcepts #SoftwareDevelopment #TechEducation

⭐𝐄𝐱𝐩𝐥𝐨𝐫𝐢𝐧𝐠 𝐚𝐛𝐨𝐮𝐭 𝐭𝐡𝐞 𝐓𝐨𝐤𝐞𝐧𝐬 𝐢𝐧 𝐉𝐚𝐯𝐚: In Java, tokens are the smallest meaningful elements of a program that the compiler can understand. They act as the fundamental building blocks of a Java program. Here's a breakdown of the types of tokens in Java: ➜ 1. Keywords: Reserved words in Java with predefined meanings. Examples: class, public, static, if, else, while, return, etc. Cannot be used as identifiers (e.g., variable names). ➜ 2. Identifiers: Names used to identify variables, methods, classes, or objects. • 𝐑𝐮𝐥𝐞𝐬: Must begin with a letter, _, or $. Cannot be a keyword. Case-sensitive. • 𝙀𝙭𝙖𝙢𝙥𝙡𝙚𝙨: myVariable, calculateSum. ➜ 3. Literals: Constant values directly used in the program. • 𝐓𝐲𝐩𝐞𝐬: Integer literals: 10, -5 Floating-point literals: 3.14, -0.01 Character literals: 'A', '9' String literals: "Hello", "Java" Boolean literals: true, false ➜ 4. Operators: Symbols used to perform operations on variables and values. • 𝐓𝐲𝐩𝐞𝐬: Arithmetic operators: +, -, *, /, % Relational operators: ==, !=, <, >, <=, >= Logical operators: &&, ||, ! Assignment operators: =, +=, -=, etc. ➜ 5. Separators (Delimiters): Characters used to separate tokens in a program. • 𝙀𝙭𝙖𝙢𝙥𝙡𝙚𝙨: 𝐏𝐚𝐫𝐞𝐧𝐭𝐡𝐞𝐬𝐞𝐬: () 𝐂𝐮𝐫𝐥𝐲 𝐛𝐫𝐚𝐜𝐞𝐬: { } 𝐒𝐞𝐦𝐢𝐜𝐨𝐥𝐨𝐧: ; 𝐂𝐨𝐦𝐦𝐚: , #java #Day3 #Corejava #Codegnan Thanks to my mentor: Anand Kumar Buddarapu Saketh Kallepu Uppugundla Sairam