How to exclude fields from serialization in Java using transient

🚀 Observer Pattern Example (Java) This example demonstrates the Observer pattern. The `Subject` class maintains a list of `Observer` objects and notifies them when its state changes. The `ConcreteObserver` class implements the `Observer` interface and updates its state when notified by the `Subject`. The `Subject` and `Observer` classes are loosely coupled, meaning that they can be changed independently of each other. This promotes flexibility and maintainability. Learn more on our app: https://lnkd.in/gefySfsc #Java #JavaDev #OOP #Backend #professional #career #development

🚀 Comparing Strings: equals() vs. == (Java) When comparing strings in Java, it's crucial to use the `equals()` method rather than the `==` operator. The `==` operator compares the memory addresses of the String objects, while the `equals()` method compares the actual content of the strings. Using `==` can lead to incorrect results, especially when comparing strings created using different methods. Always use `equals()` for content comparison and `equalsIgnoreCase()` for case-insensitive comparisons. Learn more on our App and Website: 📱 App: https://lnkd.in/gefySfsc 🌐 Website: https://techielearn.in #Java #JavaDev #OOP #Backend #professional #career #development

🚀 String Immutability (Java) Strings in Java are immutable, meaning that once a String object is created, its value cannot be changed. Any operation that appears to modify a String, such as concatenation or substring, actually creates a new String object. This immutability ensures that String objects can be safely shared and used in multi-threaded environments. Understanding string immutability is crucial for optimizing performance and avoiding unexpected behavior. 📖 Learn one new thing daily — become 1% better every day! 💪 Study smarter, not harder — 10,000+ concepts, 4,000+ articles, and 12,000+ quiz questions at your fingertips! 📲 Download the app: https://lnkd.in/gefySfsc 🌐 Learn more: https://techielearn.in #Java #JavaDev #OOP #Backend #professional #career #development

🚀 Accessing and Modifying Fields Dynamically (Java) Reflection allows you to access and modify the values of fields (including private fields) of an object at runtime. You can obtain a `Field` object representing the field you want to access or modify. For private fields, you need to call `setAccessible(true)` to bypass access restrictions. Then, you can use `get()` to retrieve the field's value and `set()` to modify it. This capability can be useful for debugging, testing, and serialization. #Java #JavaDev #OOP #Backend #professional #career #development

Discovering JConsole — Your Window into the JVM When your Java app starts using more memory than expected or behaves strangely under load, what do you do? Most developers jump straight to logs — but there’s a hidden gem built right into the JDK: JConsole. What is JConsole? JConsole (Java Monitoring and Management Console) is a graphical tool that connects to a running Java Virtual Machine (JVM) and gives you real-time insights into what’s happening inside it. How to launch it: Open your terminal and run: jconsole Then select the process you want to monitor (local or remote). What you can monitor: Memory usage – See heap, non-heap, and garbage collection activity. Threads – Check how many threads are active, blocked, or waiting. CPU load – Understand how much processing your app consumes. MBeans – Interact with your application’s JMX (Java Management Extensions) beans. Classes – Track how many classes are loaded or unloaded. Why it matters: JConsole helps you diagnose memory leaks, monitor performance, and fine-tune JVM parameters — without restarting or instrumenting your application. Pro tip: You can connect remotely to a production JVM (securely) using: -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=9010 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false (Just remember to secure these connections in real environments!) In short: JConsole gives you visibility into the JVM’s heartbeat — and it’s already on your machine. Sometimes, the best monitoring tools are the ones you’ve had all along. #Java #JVM #Performance #Monitoring #JConsole #DevTips

🚀 Object Serialization and Deserialization (Java) Object serialization is the process of converting an object's state to a byte stream, which can then be stored in a file or transmitted over a network. Deserialization is the reverse process, reconstructing the object from the byte stream. Java provides the `ObjectOutputStream` and `ObjectInputStream` classes for serialization and deserialization, respectively. The class of the object being serialized must implement the `Serializable` interface. Serialization is useful for persisting object data and transferring objects between applications. Learn more on our app: https://lnkd.in/gefySfsc #Java #JavaDev #OOP #Backend #professional #career #development

🚀 Bounded Type Parameters: Limiting Generic Types (Java) Bounded type parameters allow you to restrict the types that can be used with a generic class or method. You can specify an upper bound using the `extends` keyword, which means that the type parameter must be a subtype of the specified class or interface. This allows you to write code that relies on specific methods or properties of the bounded type. Bounded type parameters improve type safety and allow for more specific generic programming. Learn more on our app: https://lnkd.in/gefySfsc #Java #JavaDev #OOP #Backend #professional #career #development

🚀 Implementing a Thread Pool for Socket Handling (Java) Using a thread pool in a socket server provides a more efficient way to manage threads compared to creating a new thread for each connection. A thread pool reuses existing threads to handle multiple tasks, reducing the overhead of thread creation and destruction. This leads to better performance and resource utilization. The `ExecutorService` interface in Java provides a convenient way to implement thread pools. 💡 Sharpen your skills, expand your horizons! 📚 Build your tech expertise — 10k+ concise concepts, 4k+ articles, 12k+ practice questions. AI-enhanced! ⚡ Join thousands: https://lnkd.in/gefySfsc 🌐 Website: https://techielearn.in #Java #JavaDev #OOP #Backend #professional #career #development

☕ Day 14 of my “Java from Scratch” Series – “Logical Operators in Java” Logical Operators are used to combine multiple conditions and return a boolean result (true or false). 🔹 1. AND (&&) If both values are true, the result will be true. Otherwise, the result is false. T && T => T T && F => F F && T => F F && F => F 🔹 2. OR (||) If any one of the values is true, then the result will be true. If both values are false, the result will also be false. T || T => T T || F => T F || T => T F || F => F 🔹 3. NOT (!) This gives the opposite value of the condition. If it’s true, it becomes false — and vice versa. !T => F !F => T 💡 In simple words: Logical operators are most commonly used in if conditions, loops, and complex decision-making. 👉 Question for you: What will be the result of this code? 👇 int a = 5, b = 10, c = 15; System.out.println(a < b && b < c); (Comment your answer below ⬇️) #Java #Programming #Learning #SoftwareDevelopment #SoftwareEngineering #JavaDeveloper #Logic #Coding #JavaFromScratch #Tech #LogicalOperatorsInJava #NeverGiveUp

🚀 Using UDP Sockets (Java) UDP sockets in Java are implemented using the `DatagramSocket` and `DatagramPacket` classes. `DatagramSocket` is used to send and receive UDP packets, while `DatagramPacket` represents the actual data being transmitted. Because UDP is connectionless, each packet is sent independently and may arrive out of order or not at all. This example demonstrates sending and receiving UDP packets, highlighting the lack of a persistent connection. 👉Download our app to access 10,000+ concise concepts, 60+ subjects and 4,000+ articles — explore now. 📱App : https://lnkd.in/gefySfsc 🌐 Visit our website for more resources. 🌐 Website : https://lnkd.in/guvceGZ3 👉 Learn smarter — 10,000+ concise concepts, 4,000+ articles, and 12,000+ topic-wise quiz questions, personalized by AI. Dive in now! 📱 Get the app: https://lnkd.in/gefySfsc 🌐 Explore more on our website. 🌐 Website : https://lnkd.in/guvceGZ3 #Java #JavaDev #OOP #Backend #professional #career #development