I gathered information from environment and sharing you this information with all. When Ever you want to call any servlet from another servlet We can use two ways:- A servlet can make an HTTP request of another servlet. Opening a connection to a URL A servlet can call another servlet’s public methods directly, if the [...]

Its a common requirement that we require a captcha to be integrated on our page. I would like to mention a free captcha service which can be implemented in integrated on websites. What is reCaptcha? reCAPTCHA is a free CAPTCHA service that helps to digitize books, newspapers and old time radio shows. It’s Free! Yep, [...]

What is JSON? JSON (Javascript Object Notation) is a light weight data interchange format. JSON is a subset of the literal object notation in JavaScript. It can be compared to XML but parsing of JSON is very much easier than XML data. It is a text format of data and is programming language independent. In [...]

A map is an interface in the java.util package which stores the association between key and its corresponding value. A map cannot contain duplicate keys; each key can map to at most one value Map differs from array in a way that we can store a value at a particular index in arrays but a [...]

Quartz is a full-featured, open source job scheduling service that can be integrated with, or used along side virtually any Java EE or Java SE application – from the smallest stand-alone application to the largest e-commerce system. Quartz can be used to create simple or complex schedules for executing tens, hundreds, or even tens-of-thousands of [...]

I found some useful information on internet about hibernate caching.I thought of sharing with everyone. High-volume database traffic is a frequent cause of performance problems in Web applications. Hibernate is a high-performance, object/relational persistence and query service. In many cases, second-level caching can be just what Hibernate needs to realize its full performance-handling potential. What [...]

While working I found one keyword Synthetic variable or method in java. Never heard of this before.I found some information on net and thought of sharing knowledge with everyone. If you want add something in this ,it would be really great. “Synthetic” attribute means a variable introduced by the compiler that doesn’t appear in the [...]

Dojo is the Open Source JavaScript Toolkit. It is tool for constructing dynamic web user interfaces. Dojo offers various widgets, utilities, higher IO (AJAX) abstraction etc.It is based on HTML and javascript. Dojo ups abstraction layer in a higher level. Dojo is sometimes advertised as AJAX framework. It is able to make AJAX requests with [...]

Marker interface is a interface which don’t have any mehtod.It is used to tag the implementing class based on their purpose.Marker interface is a Java interface which doesn’t actually define any fields. It is just used to “mark” Java classes which support a certain capability –the class marks itself as implementing the interface. For example, [...]

A type of inner class that has no name that you define right in the middle of a method (where static init blocks and instance init blocks count as methods). You define it, and create an object of that type as a parameter all in one line. An anonymous class is defined and instantiated in [...]