Here is a quick introduction on how to create a Spring Boot web app. For this tutorial, I use Spring Tools 4 for Eclipse. Spring Boot Spring is a flexible framework with a lot of components that can be configured to be used by you Java applications. SpringBoot is a Read more…
This article shows how to quickly build a web application using the Spring Tools Suite. For this tutorial, I use Spring Tools 4 for Eclipse, where I initialize projects using Eclipse wizards. Spring Boot Web Application Spring has a lot of components, and SpringBoot is a convention over configuration approach Read more…
To back up a WordPress website, you need to backup two components: database: posts, pages, categories, comments, users, plugin data, etc. filesystem: media, plugins, files, etc. Here we see how to backup and restore a WordPress instance via command line both in pure-bash fashion and also wordpress is running on Read more…
This article contains a series of exercises on java arrays, including resizing array implementation, merging sorted arrays, etc.. Resizing-array implementation A Java ArrayList is a resizable-array implementation of the List interface providing amortized-time for insertion of O(1). Exercise: implement a ResizingArray class providing O(1) amortized-time for insertion. Growing the array Read more…
This article shows how to quickly build an EMF model using the Ecore Tools UML editor and generate the Java source code. For this article I am using eclipse eclipse-modeling-tools-2019-06. Modeling Motivations Main motivations for modeling and code generation: separation of application logic w.r.t. implementation: your independent model can be Read more…
In my development environment, I am running WordPress on docker containers, and I want a system to backup (and restore) both the DB and the WordPress data. For this article, I assume you are familiar with docker and Linux bash concepts. If you just want to backup a DB running Read more…
You use maven in Eclipse, and need to work with multi-module (hierarchical) projects? This page shows how to create and work with maven multi-module projects in Eclipse. For this article, I am using eclipse-jee-2019-06, which already supports maven. If you use a different version of eclipse, make sure the m2e Read more…
Here are three examples covering maven basics in Eclipse such as: convert a java project to maven nature, create a project with an archetype selection, and refresh/update projects and understand files and structure. For the article, I use eclipse-jee-2019-06, which already provides maven support. If you use a different version Read more…
Notes on practical usage of Java 8 stream filtering. Stream Filtering A Stream<T> references a sequence of T values, and exposes a set of aggregate operations we can use to manipulate data in a pipeline. As an example, we can find the name of any people older than 20. In java, you can loop Read more…
Here are some notes on parsing XML file with java to extract information Simple Example Assume we have an XML file and we want to extract specific attributes. A sample file could be: With XMLStreamReder Here is the code to quickly scan the XML file and get the values for Read more…