Java Constructor Overloading in Rectangle Class

Java provides multiple ways to create lists, but not all lists behave the same. List.of(), Arrays.asList(), and Collections.unmodifiableList() may look similar, yet differ in mutability, behavior, and use cases. Understanding these differences helps you: Write safer, cleaner code Avoid unexpected runtime exceptions Choose the right list type for your application #Java #JavaDeveloper #CoreJava #ProgrammingTips #BackendDevelopment #SoftwareEngineering #ShristiTechAcademy

⚠️ throw — Manually creates an exception In Java, throw is used to explicitly create an exception. ✔ Used inside method body / constructor ✔ It is an executable statement ✔ Used to signal invalid business logic or conditions throw new IllegalArgumentException("Age below 18"); Once an exception is thrown 👇 👉 It must be handled using try-catch 👉 OR it must be declared using throws GitHub Link: https://lnkd.in/gABuxNag 🔖Frontlines EduTech (FLM) #Java #ExceptionHandling #Throw #Throws #CleanCode #JavaDeveloper #Java #ResourceManagement #AustraliaJobs #SwitzerlandJobs #NewZealandJobs #USJobs #CleanCode #JavaDeveloper #ProgrammingConcepts #BackendDevelopment #SoftwareEngineering

🚀 Illustrating Method Overloading with Different Parameter Types (Java) This code demonstrates method overloading using different data types for the parameters. The `display` method is overloaded to accept an integer and a string. When the `display` method is called with an integer, the first version is executed. When it's called with a string, the second version is executed. This highlights how Java's compiler resolves method calls based on the provided arguments, enabling flexible and reusable code. Learn more on our app: https://lnkd.in/gefySfsc #Java #JavaDev #OOP #Backend #professional #career #development

🚀 Illustrating Method Overloading with Different Parameter Types (Java) This code demonstrates method overloading using different data types for the parameters. The `display` method is overloaded to accept an integer and a string. When the `display` method is called with an integer, the first version is executed. When it's called with a string, the second version is executed. This highlights how Java's compiler resolves method calls based on the provided arguments, enabling flexible and reusable code. Learn more on our app: https://lnkd.in/gefySfsc #Java #JavaDev #OOP #Backend #professional #career #development

🚀 Illustrating the Illegal Method Overloading by Return Type (Java) This code will result in a compile-time error because the two `calculate` methods have the same name and parameter list but different return types. The Java compiler cannot differentiate between these methods based solely on the return type. This example emphasizes the rule that method overloading must be based on differences in the method signature (name and parameter list), not just the return type. #Java #JavaDev #OOP #Backend #professional #career #development

🚀 What I learned this today in Java I revisited a small but powerful Java feature that often gets overlooked: Optional. Instead of returning null and risking a NullPointerException, Optional helps make the absence of a value explicit and safer. A simple example: Optional<User> user = userRepository.findById(id); user.ifPresent(u -> log.info(u.getName())); What stood out to me: Forces you to think about null handling Makes code more readable and intention-revealing Helps reduce defensive null checks everywhere Small improvements like this may not look impressive, but they compound over time and lead to cleaner, more maintainable code. 👉 How do you usually handle null values in your Java applications? #Java #CoreJava #CleanCode #BackendDevelopment #JavaDeveloper

Java☕ — Exception handling taught me responsibility ⚠️ Earlier, whenever I saw an error, I did this: #Java_Code try { } catch (Exception e) { e.printStackTrace(); } It worked… but it was trash code. Then I learned the real purpose of exceptions: They are not for fixing errors — they are for handling failure properly. Good exception handling means: ✅Catch only what you can handle ✅Never swallow exceptions ✅Fail fast when required #Java_Code try { readFile(); } catch (IOException e) { throw new CustomException("File read failed", e); } This changed my mindset: Exceptions are part of design, not afterthoughts. #Java #ExceptionHandling #CleanCode #BackendDevelopment

Java☕ — Optional changed how I handle nulls 🚫 Earlier, my code was full of this fear: #Java_Code if(obj != null) { obj.getValue(); } Too many checks. Too easy to miss one. Then I learned about Optional. #Java_Code Optional<User> user = findUser(id); user.ifPresent(u -> System.out.println(u.getName())); Optional taught me an important lesson: Null is not a value — it’s absence. 📝With Optional, code becomes: ✅Safer ✅More expressive ✅Easier to read Instead of asking “Is it null?” I now ask “Is value present?” That mindset shift mattered more than the syntax. #Java #Optional #CleanCode #Java8

⚡ Small Java optimizations that actually matter Not every performance improvement needs a major refactor. Some small Java habits make a big difference over time. A few that I actively try to follow: Use StringBuilder instead of String in loops Prefer Set over List when you only care about uniqueness Avoid unnecessary object creation in frequently called methods Use early returns to keep methods readable Don’t fetch more data than you need from the database None of these are “advanced tricks”, but together they: ✔ Improve readability ✔ Reduce memory pressure ✔ Make debugging easier Clean code is often about doing fewer things, not smarter ones. 💬 What’s one Java optimization habit you always follow? #Java #CleanCode #Performance #BackendDevelopment #JavaDeveloper #LearningInPublic

Java didn’t magically become cross-platform. Someone had to solve a real problem. This post explains how that problem was solved. #Java #SoftwareEngineering #BackendDevelopment #ComputerScience #ProgrammingConcepts