Roy Tutorials

I am going to show you how to generate JAXB classes from XSD file using maven build tool. I am going to use JAXB-2 Maven Plugin to generate the Java classes from XSD file. Finally I am also going to show you how unmarshal XML file using JAXB 2 API. This will ensure the validity of your XSD file.

This tutorial example shows how to populate HTML input fields in form automatically when a page is loaded or when a checkbox is checked. The below example has three fields and one of then gets populated when the page is loaded and another one of them is populated when checkbox is checked. Sometimes you may need to auto populate the…

Introduction Here I am going to give an example on how Asynchronous REST webservice with Connection Callback. The most important concept in REST is resources, which are identified by global IDs — typically using URIs. Client applications use HTTP methods (GET/ POST/ PUT/ DELETE) to manipulate the resource or collection of resources. A RESTful Web service is implemented using HTTP…

Introduction Here I am going to give an example on how Asynchronous REST webservice with Completion Callback. The most important concept in REST is resources, which are identified by global IDs — typically using URIs. Client applications use HTTP methods (GET/ POST/ PUT/ DELETE) to manipulate the resource or collection of resources. A RESTful Web service is implemented using HTTP…

Introduction Here I am going to give an example Asynchronous REST service with Timeout using Jersey API. The most important concept in REST is resources, which are identified by global IDs — typically using URIs. Client applications use HTTP methods (GET/ POST/ PUT/ DELETE) to manipulate the resource or collection of resources. A RESTful Web service is implemented using HTTP…

Introduction Here I am going to give an example on how Asynchronous REST webservice works. This is a simple asynchronous REST service using Jersey API. The most important concept in REST is resources, which are identified by global IDs — typically using URIs. Client applications use HTTP methods (GET/ POST/ PUT/ DELETE) to manipulate the resource or collection of resources….

This tutorial shows how to read from a csv file and write to a csv file using PHP programming language. In this example I have shown how to read a csv file and display those values on the browser when you run the PHP file. I have also written those csv entries into another output csv file. There are few…

In this tutorial I will show you how to integrate Google Custom Search Engine with Codeigniter. Prerequisites PHP Engine 5.4 or later Codeigniter 2.2 Apache http server 2.2 or later Knowledge of html, css, javascript, php Final Output Step 1. Create google account if you do not have already one or sign in to google cse(Custom Search Engine) using your…

In this tutorial I will show you a step by step guide on how haar wavelet transform happens. We will show this implementation with sample data on which we will perform haar wavelet transform. Haar Wavelet Transform is based on Lifting Scheme. Haar wavelet transformation basically used in image processing. Using haar wavelet transform you can reduce the size of…

In this tutorial I will show you how you can read an image using Java. There are several kinds of image formats such as JPEG, GIF, PNG, BMP, TIFF etc. Java has built-in Image I/O API in javax.imageio package and it can be used to load external image formats into its BufferedImage formats. By default, Image I/O supports image formats…