Hibernate, Maven and HSQL – Example Project (XML Mapping)

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In this tutorial we will write a simple Java project to demonstrate Hibernate, HSQL and Maven. We will first create a Java project using Maven and then will add Hibernate on it. HSQL database is used to make the project simple, as we can use in-memory database and we would need only a JAR file […]

jQuery Effects – Hide, Show and Toggle

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We can create great animations using jQuery. jQuery provides various methods to create animation effects in the web pages. We can use standard animation effects those are most frequently used and also we can customize the effects for better visuals. In this article, we’ll discuss about jQuery basic effects. Let’s discuss about three main methods […]

Working with DOM Attributes using jQuery

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In the previous article we learned about manipulating CSS class using jQuery. In this article, we discuss about dealing with DOM attributes using jQuery. jQuery provides flexible methods to get or set DOM attributes and values of the matched elements, and to get or set property values of the matched elements and also to get […]

Creating Simple Web Application Using Apache Maven

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In the previous post we saw how to create simple Java project using Maven. We will create a simple web application. The goal of this post is to highlight the basic features Maven provides to develop web applications. This post covers the following : Create simple web application using Maven Archetype plugin. Prepare the Tomcat […]

Example for a class implementing comparable interface in Java

When you need some sort of ordering for the classes which you define, you will be going either for a comparable or comparator interface. Consider this example package test; import java.util.*; public class TreeSetTest { private static Set<Person> s = new TreeSet<Person>(); public static void main(String a[]){ s.add(new Person(20)); s.add(new Person(30)); s.add(new Person(10)); s.add(new Person(50)); […]

Quartz Job Scheduler – Example Code

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In this section we are going to develop a simple Quartz Scheduler application with the help of Quartz framework. That will display Hello World Quartz Scheduler :date & time on the console window after specified time schedule. Before using Scheduler you have to instantiate it. For doing this some users may keep an instance of […]

What is load on startup element in web.xml file

specify the order in which we want to initialize various Servlets. Like first initialize Servlet1 then Servlet2 and so on. This is accomplished by specifying a numeric value for theĀ  <load-on-startup> tag. <load-on-startup> tag specifies that the servlet should be loaded automatically when the web application is started. The value is a single positive integer, […]

Hibernate XML configuration file example

What is super and this keyword in java?

keyword : this ‘this’ is used for pointing the current class instance. It can be used with variables or methods. Look into the following example: class Test{ private int i=10; public void m(){ System.out.println(this.i); } } In the above code this is used for the current instance. Since this is instance of a class it […]

How to use BitWise shift operator in Java?

They are called shift operators and they operate by shifting the number of bits being specified as an operand in the operation. >> —> Right shift Operator << —> Left Shift Operator >>> —-> Right bit with zero fill operator. The first two maintain the MSB when shifting thereby they maintain the sign of the […]