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Java Interface with Real-World Payment Example
In Java, an interface is like a contract. It defines what a class should do, not how it does it.…
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Java static Keyword Explained with Real Examples
The static keyword in Java is commonly used but often misunderstood. It helps define variables or methods that belong to the class…
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Spring Boot Kafka Publisher and Consumer Example with Docker
Apache Kafka is widely used for building real-time data pipelines. In this post, we’ll build a simple Kafka-based communication between…
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Spring Boot Scheduled Tasks with Real-World Examples
In many applications, we need to run background jobs — like sending reminders, syncing data, or cleaning logs. Spring Boot…
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Spring Boot Interceptor: Understanding with Real-Time Example
🤔 What is an Interceptor in Spring Boot? In Spring Boot, an interceptor is a component that allows you to intercept incoming…
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Java 8 Stream API — Interview Q&A with Real Examples
In this post, we explore commonly asked Java 8 Stream API interview questions with practical examples and explanations. Ideal for…
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What is a Singleton Class in Java?
Java: Single Class — Real Use Cases & Interview Q&A 👨💼 Interviewer: Can you explain what a Singleton class is?…
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How to Read Data from a CSV File and Convert to ArrayList in Java
Reading data from a CSV file is a common task in Java programming. In this post, we’ll learn how to…
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Spring Boot Interview – Return JSON and XML from the Same Endpoint (Interactive Q&A)
Let’s simulate a Java/Spring Boot interview where the topic is producing both JSON and XML responses from a REST endpoint. Here’s how…