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There are multiple ways to enable CORS in Spring Boot. Enable CORS Globally To apply CORS settings to all endpoints in your Spring application, you can use the WebMvcConfigurer interface. Enable CORS for Specific Endpoints You can use the @CrossOrigin annotation to enable CORS for specific controllers or methods. This approach is ideal if you…
NullPointerException (NPE) is a notorious runtime exception that plagues Java developers, often leading to unexpected crashes and errors in their applications. In this blog, we’ll explore the causes of NullPointerExceptions, examine common scenarios where they occur, and provide practical examples and best practices for preventing and handling them effectively. Causes of NullPointerException: Uninitialized Variables: In…
Introduction: The problem involves identifying pairs of indices in an array that satisfy certain conditions, with a specific mathematical operation. This blog will discuss the problem, the provided solution, and break down the code for a better understanding. Problem Overview: The goal is to find the count of such nice pairs of indices. Due to…
When it comes to building and managing Java projects, dependency management plays a crucial role. One aspect of this is caching the dependencies to ensure faster builds and more efficient project development. In the Java ecosystem, Ivy is a widely used dependency manager, and understanding how it manages its cache is essential for any developer….
gRPC is a powerful framework for defining and using services that run over HTTP/2. It’s particularly efficient for low-latency, high-throughput applications. Over time, as you develop gRPC-based systems, you might encounter the need to deprecate certain parts of your API, such as services, methods, fields, or even entire messages. Deprecation is crucial when you need…
In the world of multithreading, synchronization is a crucial concept to ensure that threads don’t interfere with each other while accessing shared resources. Class and object-level locks are two mechanisms used in Java to achieve this synchronization. In this blog, we’ll explore what class and object-level locks are, when to use them, and their advantages…
While going through multithreading in java you must have came across this function “Thread.yield This function is special for me because the definition of the function is So let’s go in detail about the native modifier In Java, the native modifier is used to indicate that a method is implemented in a platform-specific manner, typically…
Making a class immutable means that its state cannot be changed once it’s created. In other words, all the fields of the class are set at the time of instantiation and cannot be modified afterward. This can be achieved by using the following techniques: Declaring all fields as final: This ensures that the fields cannot…
Reflection in Java is a mechanism that allows a program to examine and manipulate the structure and behavior of objects at runtime. With reflection, a program can inspect and modify fields, methods, and constructors of a class, as well as access information about the class itself, such as its name, superclass, and interfaces. Reflection is…
In Java,we use these keywords in our development all the time and somehow never realize in which situation we get a compile error until the intellisense prompts us or when we are asked question in interview about it.So let’s see both the keywords in detail. Final keyword can be applied to a 1.A class 2.A…