J2EE FAQ

Java 2 Enterprise Edition

Code
import java.io.*;
import java.util.*;
public class Hello
{
public static void main(String args[])
{
System.out.println("!@#$%^&*");
}

Singleton Design Pattern,Factory,DAO,MVC ,Prototype ..

To implement log4j in the web application there are different way. 1.we have to write a common logger class. 2.we have to configure corresponding class in web.xml and 3. we have to configure the prop...

You cannot do that.

Abstract classes used to implement polymorphism. Abstract class allows additional method declaration in the class.

Please read detailed discussion here http://www.geekinterview.com/question_details/19145

Hash map is basically a collection API which is used to save data in sorted order avoiding duplicates. where hash table herits Object class. Hashtable is synchronized, whereas HashMap is not. This m...

The HashMap class is roughly equivalent to Hashtable, except that it is unsynchronized and permits nulls. (HashMap allows null values as key and value whereas Hashtable does not allow). HashMa...

Servlet is not thread safe, but that is because of the class/instance variables. So care must be taken to provide synchronized access to class/instance variables. Synchronizing entire service or doGet/doPost methods is bad and should be avoided.

servlet is not thread safe by itself but u can make it thread safe by synchronizing the particular line's of service method.

No, you cannot call Java swing in JSP or Servlet without using Applet.

how can i convert the jsp file into html file?