Roy Tutorials

Introduction In this example we will see how to work with spring boot multi-module project and deploy them together in embedded Tomcat server. The Tomcat Server comes with the Spring Boot API, so we don’t need to include extra jar or library for it. The individual module is also deployable. You may also want to use other server like Jetty…

Introduction This example will show you how to add two matrices using two dimensional array in C program. In this example a user will be asked to enter the number of rows and columns for two matrices. Then user will be asked to enter the elements at each index of the matrices. Once user finishes providing inputs for two matrices…

Introduction Here we will see an example on creating a custom HashMap in Java. We have seen the built-in implementation of HashMap in Java API and we know how HashMap works and its usages. The intention of this example is not to create a rigid HashMap that provides the same functionalities as Java API provides but to give an idea…

Here we will see how the huge volume of data in a file can be sorted easily. You can use tutorial Generate File with Random Content in Java to generate a large text file. For a smaller file whose contents fit into the memory, sorting the file programmatically can often be as simple as reading the contents of the file into…

In this Codeigniter AngularJS CRUD example, we will see the integration of AngularJS with Codeigniter REST. We are going to create CRUD application using Codeigniter REST API on server side and AngularJS is encapsulated within PHP file on client side. Thus the client will communicate with server asynchronously using AngularJS $http service. Please read the following tutorials before reading this…

File with Random Content This tutorial will show you how to generate file with random content in Java. I will generate random content in a text file using wordnet-random-name API in Java. You can set limit to any number of lines for the text file to hold generated random content in it. This kind of random content is a quick…

Introduction In this tutorial I will show you an example on Spring Data JPA CRUD. Here I will use the embedded or in-memory HSQL database. CRUD means Create, Read, Update, Delete. So I am going to perform basic CRUD operations on some entities. In this example I will create annotation based Spring standalone application. Related Posts: Embedded HSQL Database in…

In this tutorial we will see the integration of AngularJS with PHP REST. We are going to create CRUD application using PHP REST API on server side and AngularJS is encapsulated within html file on client side. Thus the client will communicate with server asynchronously using AngularJS $http service. Please read REST API CRUD Example in PHP, MySQL for server…

In this tutorial we will see the integration of AngularJS with Spring MVC. We are going to create CRUD application using Spring REST API on server side and AngularJS is encapsulated within JSP file on client side. Thus the client will communicate with server asynchronously using AngularJS $http service. If you need PHP version https://roytuts.com/angularjs-php-rest-crud-example/ If you need Codeigniter version…

Spring Async In this tutorial I will discuss about the asynchronous execution support in Spring using the @Async annotation. There are cases where Spring framework’s @Async is necessary to execute piece of code asynchronous. An example would be while sending a (JMS) message from one system to another system. The advantage is that the user does not have to wait…