Java 11 HttpClient API Simplifies HTTP Calls

✅ Java Features – Step 21: Pattern Matching for instanceof (Java 17) ⚡ Before Java 17, using instanceof required an extra cast. Example (old style): if (obj instanceof String) { String s = (String) obj; System.out.println(s.length()); } Java 17 simplifies this with pattern matching. if (obj instanceof String s) { System.out.println(s.length()); } Now the variable s is automatically created after the type check. Why this matters Less boilerplate code Safer type checking Improved readability Fewer casting mistakes Example Object value = "Java"; if (value instanceof String str) { System.out.println(str.toUpperCase()); } Key takeaway Pattern matching reduces repetitive casting and makes type-checking logic cleaner. This is part of Java’s effort to modernize the language. Next up: Recap – Key Features from Java 8 → Java 17 🚀

📄 On paper this looks like a small syntax tweak, ✨ but in real projects it feels like a relief. 🔧 DTO mapping, 📝 logging, or ⚙️ handling different event types in a backend system — we used to write instanceof checks followed by repetitive casts everywhere. ❌ It wasn’t just ugly, it was error‑prone. ✅ Now the flow is natural: if (event instanceof PaymentEvent pe) { auditLogger.log(pe.getTransactionId()); } 💡 This isn’t just saving a line of code. 👉 It’s about intent. 👥 When a teammate reads this, they immediately see what’s happening without being distracted by boilerplate. 🚀 In practice, these “small” changes: 🔓 reduce friction 👶 make onboarding easier for juniors 🎯 help teams focus on business logic instead of ceremony 📌 My takeaway: Code is not only for machines to run, but for humans to read, share, and maintain. Readability = productivity. This way your repost feels more personal, visually appealing, and relatable to everyday coding practice.

✅ Java Features – Step 19: Records (Java 16) 🚀 Java 16 introduced Records to simplify the creation of data-carrying classes. Before records, creating a simple data class required a lot of boilerplate: class User { private final String name; private final int age; public User(String name, int age) { this.name = name; this.age = age; } public String getName() { return name; } public int getAge() { return age; } } With Records, the same thing becomes much simpler: record User(String name, int age) {} Java automatically generates: Constructor Getters toString() equals() hashCode() Why this matters Removes boilerplate code Perfect for DTOs and immutable data objects Improves readability and maintainability Example usage User user = new User("Mariya", 30); System.out.println(user.name()); Key takeaway Records are ideal when your class is mainly used to store and transfer data. Next up: Java 17 – Sealed Classes 🔒

Discover Java 11 features like HTTP Client, var in lambdas, new String methods, and file I/O updates with code and JEP links.

Java 25 pattern matching in instanceof and switch With every new release in java numerous interesting features are being added.  Latest LTS java 25 has included pattern matching for primitive types in instanceof and switch(This feature is also available in non LTS versions 23 and 24). The biggest benefit a developer gets from this update is guarantee that there will not be any lossy conversion. A lossy conversion can lead to numerous bugs in the application. This makes a developers life easier. Example: int i = 1000; if (i instanceof byte) {   // false -- i cannot be converted exactly to byte   byte b = (byte)i;    // potentially lossy   ... b ... } can be written as if (i instanceof byte b) {   ... b ...        // no loss of information } because i instanceof byte b means "test if i instanceof byte and, if so, cast i to byte and bind that value to b". This is similar to reference type variable pattern matching. In the above example we can add a default condition in else when the type does not match any condition in if or in switch.  We will be seeing more changes in switch and instanceof in upcoming releases. The above being the latest one.

Text Block simple example In this post under Java Core, I will introduce you to newly added "Text Block" feature. This feature was added as part of Java 15. Pre Java 15, if we have to declare a multiline string we used to declare it as shown below String result = "Since Java 15, text blocks are \n" + "available as a standard feature.\n" + "With Java 13 and 14, \n" + "we needed to enable it as a preview feature.";...

🚀 Java Series – Day 5 📌 Methods in Java 🔹 What is it? A method in Java is a block of code that performs a specific task and runs only when it is called. Methods help organize code into smaller, reusable pieces, making programs easier to read and maintain. A method generally includes: • Method name – identifies the method • Parameters – input values passed to the method • Return type – the value the method sends back (optional) 🔹 Why do we use it? Methods help avoid code repetition and make programs more structured. For example: In a banking application, a method can calculate interest, another method can check account balance, and another can process transactions. Instead of writing the same code multiple times, we simply call the method whenever needed. 🔹 Example: public class Main { // Method definition static void greetUser() { System.out.println("Welcome to the Java Program!"); } public static void main(String[] args) { // Method call greetUser(); } } 💡 Key Takeaway: Methods improve code reusability, readability, and modularity, which are essential for building scalable Java applications. What do you think about this? 👇 #Java #CoreJava #JavaDeveloper #Programming #BackendDevelopment

✅ Java Features – Step 22: Java 8 → Java 17 Recap 🚀 Over the past few posts, I’ve been revisiting some key Java features introduced from Java 8 to Java 17. A quick recap of the highlights: 🔹 Java 8 Streams API Optional Functional Interfaces Lambda Expressions 🔹 Java 9–11 Factory methods (List.of, Set.of, Map.of) var for local variable type inference New String methods (isBlank, strip, repeat) Modern HttpClient API 🔹 Java 14–15 Switch expressions Text blocks 🔹 Java 16–17 Records Sealed classes Pattern matching for instanceof Key takeaway Java has evolved significantly to: Reduce boilerplate Improve readability Support modern programming patterns Understanding these features helps write cleaner and more maintainable backend code. Next up: Practical examples of modern Java features in real backend applications ⚙️

Java 26 will be supported for just six months, until the release of Java 27 later this year. The next LTS (long-term support) Java release is expected to be Java 29 in September 2027. https://lnkd.in/g-TERN6m

🚀 Key Features from Java 8 → Java 25 Here’s a quick overview of major updates across versions. ☕ Java 8 (2014) – The Biggest Revolution Introduced functional programming to Java. Key Features: • Lambda Expressions • Stream API • Functional Interfaces • Default & Static methods in Interfaces • Optional Class • New Date & Time API 📦 Java 9 (2017) Focused on modularity and better application structure. Key Features: • Module System (Project Jigsaw) • JShell (Interactive Java Shell) • Stream API improvements • Private methods in interfaces 🚀 Java 10 (2018) Reduced boilerplate code. Key Feature: • Local Variable Type Inference (var) 🔄 Java 11 (LTS – 2018) Provided long-term stability and modern APIs. Key Features: • New String methods (isBlank, lines, repeat) • HTTP Client API • Files API improvements ⚡ Java 12 – 15 Focused on language improvements. Highlights: • Switch Expressions • Text Blocks • Sealed Classes (preview) ⚙ Java 16 (2021) Reduced POJO boilerplate. Key Features: • Records (standard) • Pattern Matching for instanceof 🔒 Java 17 (LTS – 2021) Improved class hierarchy control. Key Features: • Sealed Classes • Strong encapsulation of JDK internals 🧵 Java 19 → Java 21 (LTS – 2023) Major improvements in concurrency and developer productivity. Highlights: • Virtual Threads (Project Loom) • Pattern Matching for switch • Record Patterns • Sequenced Collections 🚀 Java 22 → Java 25 Focused on productivity, performance, and modern cloud-ready Java. Highlights: • String Templates • Foreign Function & Memory API • JVM optimizations • Concurrency improvements #Java #JavaDeveloper #ModernJava #BackendDevelopment #Programming #SoftwareDevelopment #JavaLearning #TechCareer #JavaFullStackDeveloper