In this Java tutorial I am going to share with you how to create an Anonymous java class and also how to Replace Java Anonymous Class with a shorter lambda expression. Let’s start by creating and interface which we will use in this tutorial. Our anonymous java class will implement a single method defined in this java…
Read More Replace Anonymous Java Class with Lambda ExpressionOften in our applications we need to work with objects that contain lots class fields. To instantiate such objects is very inconvenient using class constructor and is not thread safe using the setters and getters approach. The best way out will be to use Builder design pattern and in this blog post I am going…
Read More Builder Design Pattern Example in JavaIn this short code example I am going to share with you how to concatenate two ArrayList in Java. Concatenate ArrayList using addAll() function Let’s say we have these two ArrayList(s): List<String> itemsList1 = new ArrayList(Arrays.asList(“One”, “Two”)); List<String> itemsList2 = new ArrayList(Arrays.asList(“Three”, “Four”)); To concatenate the two lists together we can create a new ArrayList, and…
Read More Concatenate Two ArrayList in JavaWith this short blog post I am going to share with you how to create XML document using Java. Often we need to send HTTP Post request that contains JSON or XML payload. Earlier I have shared a blog post on different ways to create JSON Payload by converting Java objects into JSON. Below is…
Read More Create XML Document in JavaHi guys! Just wanted to share with you a new blog post and that I am about to publish a series of blog posts + videos on How to build…
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Read More RESTful Web Services with Java for your Swift Mobile ApplicationIn this short blog post I am going to share with you how to create a new Amazon AWS S3 bucket in Java and how to set permissions on it so that any user can read files from it but only you, the owner will have write access. You can use the code below with…
Read More Create Amazon AWS S3 Bucket in JavaHibernate is a great framework to use to persist data into a database when building RESTful Web Services for your mobile application with Jersey and JAX-RS. In most of the projects I have participated when designing RESTful Web Services for Mobile App we used MySQL database server and Hibernate framework to store user data which…
Read More Persist Java Object in MySQL Database With HibernateIn this blog post, I am going to share with you how to generate a Java project with Maven. You will also learn how to package your project with all the dependent libraries into a single jar file and run your Java application via the command line in the terminal window. Step 1: Install Maven…
Read More Create Java Project with MavenWhen a user signs up for our mobile app, we require them to create a secure password, which we then store in our database. However, we know that storing passwords as plain text is not secure, as it allows anyone who views the database to access users’ actual passwords. To protect these passwords from being…
Read More Encrypt User Password Example in JavaThe below code examples demonstrates how to create a new array of 5 elements of String data type in Java and how to populate each array element. You will also learn how to access each array element individually and print out its value. Create a New Array in Java. Code example. package com.appsdeveloperblog.arrays; public class…
Read More Create New Array Example in JavaIn this little Java code example you will learn how to create a new file in Java. Please note that the path to the file is absolute. Also note the use of createNewFile() function which will also check for existence of the file before creating a new one. So there is no need to write…
Read More Create New File In JavaWKWebView is a powerful class in the WebKit framework that allows you to embed web content in your iOS app. It’s essentially a mini-browser that provides a rich, interactive web experience within your application. Unlike UIWebView, which was deprecated and removed from iOS 12 onwards, WKWebView is more efficient, has better performance, and offers advanced features like…
Read More Create WKWebView Programmatically and Load Webpage URLIn this tutorial, you will learn how to implement an Apache Kafka Idempotent Producer in a Spring Boot application. Idempotence, in the context of Kafka, refers to the ability of the Kafka producer to prevent sending duplicate messages, even in the case of network errors, retries, or broker failures. This is important because it ensures…
Read More Apache Kafka Idempotent Producer in Spring BootIn this tutorial, you will learn about the retryable and non-retryable exceptions in Apache Kafka. You’ll learn how to create your own custom exceptions and how to register then with Kafka’s DefaultErrorHandler object. To demonstrate how retryable and not retryable exceptions work, I will use the Kafka Consumer Spring Boot Microservice, which I created earlier.…
Read More Retryable and Not Retryable Exceptions in Apache KafkaIn this tutorial, you will learn how recover from deserialization errors gracefully in your Kafka Consumer Spring Boot Microservice. You’ll see how to use specific settings to ensure that a single problematic message doesn’t disrupt your message processing. By the end, your consumer will be able to skip over errors and continue processing subsequent messages…
Read More Kafka Consumer: Handle Deserialization Errors