Java Thread Creation: Runnable vs Extending Thread Class

Hello Everyone👋👋 What is the difference between synchronized and volatile in Java? Synchronized makes sure that only one thread can access a block of code or method at a time, preventing concurrent access issues. Volatile makes sure that changes to a variable are visible to all threads immediately, but it doesn’t provide atomicity or mutual exclusion. #Java #backend #frontend #FullStack #software #developer #programming #code #class #object #Array #ArrayList #collections #SpringBoot #SpringAI #AI #GenAI #AgenticAI #OpenAI #Stream #API #Nodejs #React #Angular #multithreading #Java26 #interface #interview

Hello Everyone👋👋 What is an object? An object is a real-time entity with some state and behavior. In Java, an object is an instance of a class with instance variables representing its state and methods representing its behavior. Objects are created using the new keyword. #Java #backend #frontend #FullStack #software #developer #programming #code #class #object #inheritance #Array #ArrayList #collections #interface #abstract #SpringBoot #SpringAI #AI #GenAI #OpenAI #LLM #Nodejs #React #Angular #multithreading #interview

Hello Everyone👋👋 What are the different types of access modifiers in Java? Public: Accessible from anywhere. Protected: Accessible within the same package or by subclasses in other packages. Default (package-private): Accessible only within the same package. Private: Accessible only within the same class. #Java #backend #frontend #FullStack #software #developer #programming #code #class #object #Array #ArrayList #collections #SpringBoot #SpringAI #OpenAI #GenAI #AI #Nodejs #React #Angular #multithreading #interface #abstract #super #constructor #interview

Hello Everyone👋👋 What is method overriding? If a subclass provides a specific implementation of a method that is already provided by its parent class, it is known as Method Overriding. It is used for runtime polymorphism and to implement the interface methods. #Java #backend #frontend #FullStack #software #developer #programming #code #class #object #inheritance #lambda #super #constructor #SpringBoot #SpringAI #AI #GenAI #Java26 #Array #ArrayList #collections #Nodejs #Angular #React #AWS #interview

Hello Everyone👋👋 Can we make the abstract methods static in Java? In Java, if we make the abstract methods static, It will become the part of the class, and we can directly call it which is unnecessary. Calling an undefined method is completely useless therefore it is not allowed. #Java #backend #frontend #FullStack #software #developer #programming #code #class #object #Array #ArrayList #collections #super #constructor #lambda #SpringBoot #SpringAI #OpenAI #GenAI #AI #Nodejs #Angular #React #AWS #interface #abstract #Java26 #interview

Hello Everyone👋👋 Can we overload the main() method? Yes, we can have any number of main methods in a Java program by using method overloading. #Java #backend #frontend #FullStack #software #developer #programming #code #class #object #Array #ArrayList #collections #lambda #super #constructor #SpringBoot #SpringAI #GenAI #AI #OpenAI #Claude #Nodejs #React #Angular #AWS #Java26 #interface #abstract #interview

🚀 Day 4/30 — LeetCode Challenge Solved the "Palindrome Number" problem on LeetCode using Java. The logic is simple, but the key is choosing the right approach — reversing only half of the number instead of the entire value to avoid unnecessary operations. ✅ Key takeaway: Even simple problems have smarter solutions if you focus on efficiency. Continuing to build consistency and improve problem-solving skills. #LeetCode #Java #Algorithms #ProblemSolving #Consistency

🚀 Just solved LeetCode's Palindrome Number problem in Java — and all 11,511 test cases passed! ✅ Here's what I learned building a clean, string-based solution: 💡 The Approach: → Convert the integer to a string → Reverse it character by character → Compare the original vs reversed string Simple? Yes. But the real win is in the edge case — returning false immediately for negative numbers. That's clean defensive programming. 🧵 Key Takeaway: You don't always need complex math. Sometimes the most readable solution is the best solution — and readability is what makes code maintainable in production. ⚡ Runtime: 16ms | Memory: 46.62MB Not the fastest (beats 5.61%), but it's clear, correct, and gets the job done. I'm challenging myself to solve problems daily and document my thinking. Consistency > perfection. If you're on a similar DSA journey, let's connect! Drop your approach in the comments — I'd love to see how others tackled this. 👇 #LeetCode #Java #DSA #DataStructures #CodingChallenge #ProblemSolving #SoftwareDevelopment #100DaysOfCode #TechIndia

Hello Everyone👋👋 What is the difference between synchronized and volatile in Java? Synchronized makes sure that only one thread can access a block of code or method at a time, preventing concurrent access issues. Volatile makes sure that changes to a variable are visible to all threads immediately, but it doesn’t provide atomicity or mutual exclusion. #Java #backend #frontend #FullStack #software #developer #programming #code #class #object #inheritance #interface #abstract #Java26 #SpringBoot #AWS #microservices #AI #GenAI #OpenAI #Claude #LLM #RAG #Langchain #Nodejs #React #Angular #Array #interview

Hello Everyone👋👋 What is the purpose of a default constructor? The purpose of the default constructor is to assign default values to the objects. If no constructor is defined in the class, the Java compiler creates a default constructor. #Java #backend #frontend #FullStack #software #developer #programming #code #class #object #lambda #Array #ArrayList #collections #super #constructor #SpringBoot #SpringAI #AI #GenAI #interface #abstract #Nodejs #React #Angular #Java26 #interview