Java

Run A Batch Job On Open Liberty Application Server

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Okay, let’s walk through setting up and running a Jakarta Batch (formerly Java Batch, JSR 352) job on the Open Liberty application server. 1. Prerequisites: 2. Server Configuration (server.xml): You need to enable the batch feature and configure persistence for job repository data (status, history, etc.). Example server.xml Snippets: (Remember to replace the dataSource config … Read more

Messaging With JMS and ActiveMQ by Example

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One of the best way to link together different parts of your application environment is to use asynchronous messaging. And the standard way to do this with Java is JMS. And one of the most popular tools for developing JMS messaging applications is ActiveMQ. Here we will discuss JMS messaging with and provide some ActiveMQ … Read more

Difference Between equals() Method and == Operator in Java

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The equals method and the == operator are often the focus of tests and interview questions as testing for equality in Java is often something that can trip up beginner java developers. So what is the difference between the method and the operator? Lets try and make this crystal clear. Both the equals() method and … Read more

What is the JDK, JRE and JVM

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Java is one of the most popular programming languages, known for its platform independence and robust ecosystem. To understand how Java works, it’s essential to explore its three core components: JVM (Java Virtual Machine), JRE (Java Runtime Environment), and JDK (Java Development Kit). These components form the foundation of Java’s ability to “write once, run … Read more

How To Extract Text From A PNG Image

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In this tutorial, lets see how we can use OCR to extract text from a PNG image, using Java. We should be able to do this using free open source tools, so no need to spend any money here. How We Will Extract The Text From The Image Introduction If you have text in an … Read more