How to configure proxy settings in eclipse

Often times, Eclipse IDE may need access to the Internet for some plugins install and update. If your computer is behind a proxy server

then you need to handle the proxy of in the Eclipse to go throw the internet

What is GWT ? Why we want to use GWT ?

GWT :

Google Web Toolkit (GWT) is an open source Java software development framework that makes writing AJAX applications easy.

Named Native Query Vs Native Query Vs HQL / JPQL

there are some missing up with understanding the difference between the Native Named Query and Native Query and HQL , and a lot of headache about the the performance issue in using them.

How can we make a Empty interface ?

we can make an empty interface that to call it and make that configuration to the Compiler to take care about how to deal with the class that implement that interface.

What is SQL Injection ? how to prevent my website from it?

What is SQL Injection

• SQL Injection is a type of web application security vulnerability in which an attacker is able to submit a database SQL command which is executed by a web application, exposing the back-end database. 

Tomcat version 6.0 only supports J2EE 1.2, 1.3, 1.4, and Java EE 5 Web modules

I had this problem when I was adding my new server(Tomcat 6), While I was configured an old server (Tomcat 7) for the same project